ISP TECHNOLOGIES

ISP Technologies

PRODUCT FAQ

QUESTION:
I have a question on the setup of a Decimator G Sting Pedal. I’m trying to use the decimator in the effects loop and in front of the amp. I’m using a Peavey 6505+ amp. When engaging the effects loop on the Peavey pedal, with the Decimator on, the amp is silent. When engaging the lead channel of the amp, I get a hiss that won’t go away, no matter how much I turn up the Decimator G String. The amplifier is set at low volume, around 2 on the master.

This is my setup;

Fender Strat, Single, Single, Humbucker.

Effects Loop –
Decimator-Dec Out/Super Chorus/Digital Delay/Barracuda/Blues Driver to Amp FX Return – Amp FX Send to Decimator-Dec In

Front of Amp –
Guitar (Strat) to Tuner/Compressor/Fat Boost/Decimator-Guitar In/Decimator-Guitar Out to front of Amp.

Am I using this incorrectly or is there a better way of setting this up?

ANSWER:
I am not clear which Peavey amp you are using.  It sounds like the effects loop is a parallel loop and not a series loop.  In a series loop all of the signal will pass through the loop and the Decimator needs a series loop to work correctly.  You can try this test.  Turn on the loop on the amplifier and plug a cord into send and return and leave the other end of the cord open (don’t connect the other end of these two cords to anything).  If the amp has a series loop you won’t get any sound through the amp since all of the signal is going through the loop and there is no connection between the send and return.  If you get a signal then the loop is a parallel loop.  Some amps allow you to switch between series and parallel so you can check you manual to confirm.  If the amp has a parallel loop then you can still use the G-String with the pedals by inserting the pedals between the Guitar OUT and Decimator IN on the G-String and connect the Decimator OUT to the input of the amp.

 


 

QUESTION:
What is the difference between the Decimator and the Decimator G String?

ANSWER:
The difference between the two pedals is to understand the technology. Inside the pedal the guitar signal splits off into two signal paths. One path feeds a detector circuit that converts the dynamics of the guitar signal into what we call a control voltage. This control voltage is fed to a voltage controlled amplifier  (VCA) which is the second path in the pedal. The standard Decimator has these inputs of both paths tied together for one input and the output is the output of the VCA. This keeps it simple and cost effective. On the G String, for end users that require more precise triggering of the technology ie: high gain setups , we split the two signal paths apart from each other, hence the four 1/4″ ph jacks. The jacks labeled Guitar In and Guitar Out is the input of the detector. The intention is to have the guitar connected directly to the Guitar In to feed the detector directly with your dry guitar signal dynamics. The Guitar Out will connect to the front end of your pedal board or to the input of the amp. This is a consistent signal source for the detector to trigger off of. The other two jacks (Dec In and Dec Out) is the path where the VCA is located. This is the path where you’ll get the noise reduction. This path can be located after your noisiest dynamic changing pedal such as compressors, boosters, overdrives and distortion pedals. If the lead channel in the amp is the source of your noise, then the Dec In Dec out path of the G String can be inserted into the send and return of your series fx loop on the back of the amp. Because the Decimator acts like an automatic volume control, we recommend inserting it just ahead of any delay or reverb fx.

 


 

QUESTION:
Where do I place my pedals in the chain with an ISP Pro Rack G?

ANSWER:
You want to have the direct guitar output go to the input of channel 1.  We need to see the un-altered direct guitar signal for the Decimator to track correctly.  Then go from the output of channel 1 to your pedals and then to your preamp or amp.  If you are using a preamp go from the preamp out to the Decimator channel 2 input then to the power amp.  If you have a guitar amp then go pedals to the input of the amp and put the Decimator channel 2 in the effects loop.  If you add any echo or reverb you want these after the output of the Decimator channel 2 so you don’t cut off any reverb or echo tails.

 


 

QUESTION:
I’d like to change my setup and use a pedal preamp distortion. Where does it go?

ANSWER:
You can put a preamp distortion unit in between Guitar OUT and Decimator IN and then plug Decimator OUT into the input of your amp   This will allow the Decimator G String to remove the noise from the preamp pedal.  Or you can put the Decimator IN and Decimator OUT into your effects loop if you have a series effects loop.  You will need to plug your guitar into Guitar IN and put any reverb or echo after the Decimator OUT to avoid cutting off any verb or echo tails.

 


 

QUESTION:
How do the NS2 and the Decimator work?

ANSWER:
Both the NS2 and the Decimator work on the Masking principle, which means that when you play the signal will mask the noise and the Decimator works like an automatic volume control that will reduce the volume when the signal gets close to the noise floor.  The Decimator is far more adaptive than the NS2 so it should be better but I would listen to some of the clips on line and or test a unit if possible to see if it will solve your problem.

 


 

QUESTION:
I’ve got a Decimator G-String 1st version.  My amplifier is a Fender DeLuxe Reverb reissue, which doesn’t have Fx loops ; so, I wonder if there’s a better way to connect G-String to avoid cutting off delays and reverbs’tail . Normally, the signal chain is: guitar in Guitar In, then Guitar Out to first drive pedal, then modulation pedals, delay, reverb and reverb out in Dec IN . Finally, Dec OUT to the amp.
Is my rig correct ?

ANSWER:
You are  correct on the connections the only thing you can do is put your reverb and or delay between the Decimator OUT and the input of the amplifier this will avoid cutting of echo and reverb tails after you stop playing. Most of the noise comes from any gain pedals you use so this should not make the noise problem too bad.

 


 

QUESTION:
I have a question about the Decimator II and the Decimator II G String. On the Guitar Center website, it says that on the G String you can go from clean to high gain without adjusting the threshold at all. Does this mean that on the Decimator II you might have to do some adjusting when switching from clean to high gain, or are both capable of withstanding the polar opposite change in gain??

ANSWER:
Regarding the threshold settings you are correct, the G String allows you to track the guitar directly and insert the noise reduction block in your effects loop.  This will allow you to change from high gain to clean and never have to adjust the threshold since the level detector is tracking the direct guitar signal. If you insert the standard Decimator II in the effects loop it will require you to switch the Decimator off when you go from high gain to clean or you would need to re-adjust the threshold since the amount of noise in the signal seen by the level detector will change.

 


 

QUESTION:
I’m about to purchase the ISP Stealth PowerAmp and I want to ask you what is the better connection between the PowerAmp and an 8ohm 60W guitar cab.

From the specs I see that your PowerAmp is Mono 140W @ 8 ohm or Stereo 2x60W @ 8 ohms.

1 – Do I have to use the mono output 140W even if my cab is 60W? In this case, are there any risks of speaker damage?

2 – Can I use only 1 channel of the stereo output 60W? In this case, are there any risks of amplifier damage (since it operates in stereo but only one output is used)?

ANSWER:
You can run just one channel in stereo mode without any problem.  You can also run in mono bridge and just not drive the speaker too hot.  Most speakers that are rated at 60 watts can handle two times the power allowing for proper headroom for transients.  We use a 75 watt 8 ohm speaker in mono bridge and don’t have any problems but I think either way should be fine just that you will get more power in mono bridge.

 


 

QUESTION:
Which Decimator pedal will serve me best?

I have 2 pedal boards with two separate power pedals for each board.

The first board has all my drive pedals, fuzzes and wah. It goes Guitar > drive pedals > amp in.

The second board has all my modulation pedals like delay, chorus, tremolo, phaser. It goes Fx loop send > modulation pedals > fx loop return.

I was wondering if I could use the G-String II like this:
First: Guitar > Drive pedals > Decimator Guitar In > Decimator Guitar Out to Amp input
Then: Fx Loop Send > Modulation pedals > Decimator Dec In, then Decimator Dec Out to Fx Loop Return

Will this work?

I need to know if I can run the Decimator G-String II like that or if would be better to use just the normal Decimator II in front of the amp, and then I would just forget the Fx loop part.

ANSWER:
I would recommend the G String because it have better performance but you want to go direct from the Guitar to the Guitar IN on the Decimator G and then go from Guitar OUT to your gain pedals.  This will allow the Decimator to track the guitar directly.  You can then insert the Decimator IN to the send jack and put any kind of Reverb and or Delay between the Decimator OUT and the return jack in the loop.  This will allow the verb and delay to trail off in the background and eliminate the noise in the chain.  If you have any ground loop problems you simply need to remove the ground on one end of your cables that go to the Decimator IN and Decimator OUT.  Some companies offer ground lift cables so you can make or buy them.

 


 

QUESTION:
Can the Decimator Pro Rack G unit run in mono?

ANSWER:
You can simply insert a jumper between Guitar OUT and the input of Channel 1 and the unit will work just like the ProRack G.  Then re-patch when you need true stereo operation.

 


 

QUESTION:
Is it possible to power the ISP Decimator pro rack G with a MXR MC-403 Power System? The noise gate needs 900mA AC but the MXR just provides 800mA AC. Would it be possible to use these two units together or would it cause some trouble?

ANSWER:
The Pro Rack G will pull about 800 milliamps of current so it will be very close.  This could cause the MXR power supply to overheat since there will not be any headroom.  I would recommend you use a minimum 1000 milliamp supply or greater to avoid pulling the maximum current from the supply and overheating the supply.

 


 

QUESTION:
I need to replace the power supply adaptor on my ProRack G. Will any9V 1 amp power supply work or do I need something that is specialized?

ANSWER:
We ship the units with a 1.5 amp 9VAC adaptor so as to avoid overheating a smaller adaptor.  The unit will pull approx 600 milliamps and a 1AMP adaptor should be fine but, for long term reliability, we use the 1.5 amp adaptor.

 


 

QUESTION:
Can the Theta PreAmp pedal go direct to the mixing console without an amp in line for live use?  Or is an amp required?

ANSWER:
You can go direct into a mixer without an amp since it is a line level output.  It does not have a speaker simulated output so you may want to roll off the HF on the mixer to get a better speaker simulated sound but it will work direct into a mixer.

 


 

QUESTION:
What is the difference between the “normal” decimator and the “g-string” model? The only difference I know of is the one is more expensive. I have an MXR Noise Gate but it colors my tone I notice and doesn’t get rid of that 60 cycle hum. I want to upgrade to something a little more expensive
possibly if it means I will sound more professional. Thanks.

ANSWER:
The Decimator has two jacks (Decimator IN and Decimator OUT), the G String has four jacks, Guitar IN, Guitar OUT, Decimator IN and Decimator OUT.  The G String is designed to track the Guitar output directly and insert the Decimator block in your effects loop or after your gain pedals.  This is a much more effective way to control the noise reduction providing better noise reduction and better tracking for smoother operation.  This also allows you to use the decimator in your effects loop and never need to switch it off when you change settings from high gain to clean.

 


 

QUESTION:
I have the theta pedal and the stealth power amp.  I want to invest in the vector 1×12 cab as well as the vector 210 powered cab.   My question is: how would I hook all them up being that the 210 is powered.   Would I still run from output of stealth to the 210?  Or run mono out of stealth to 1×12, then from that cab to the 210?

ANSWER:
You have two options, the Vector 210 is a powered cabinet but you can connect it at either line level or at speaker level.  This would allow you to take the line level signal going to the input of the Stealth and connect it to the input of the Vector 210 or you can select the switch on the input of the Vector 210 for speaker level and then connect it to the speaker output of the Stealth.   I have included the manual for the Vector 210 to help explain the connections and hookup.

 


 

QUESTION:
Does the Impression use 200mA or 2,000mA?

ANSWER:
The Impression pedal will consume or use 200 milliamps of current at 9 volts AC.  If we shipped the pedal with a 9VAC adaptor that could only source 200 milliamps the adaptor would fail after a short period of time since it would overheat since it would be sourcing its maximum current rating at all times.  We ship the unit with a 9VAC power adaptor rated to supply a maximum of 2000 milliamps, which means the adaptor is oversized for the actual continuous load.  This means the power adaptor will run very cool and should last forever since it is sourcing about 10% of the rated maximum load current.

 


 

QUESTION:
I recently purchased a ISP G String Decimator because my Boss NS2 significantly decreased dynamic on my clean channel. I have a 5150 original head and usually have had a signal path that goes something like; TC Polytune, Crybaby from Hell, Line FM4, Maxon OD808, Wampler Triple Wreck, NS2 (now the G String), TC Dreamscape Chorus, TC Hall of Fame Reverb, Eventide Timefactor, Mission Volume Pedal.

I’ve never used my effects loop on the 5150 as I’ve noticed a decrease in volume, although I am bringing it to a top tech in Brooklyn this coming week.

Could I run the G String as I did the NS2 in the front of the amp? Should it go before the tuner as to track the guitar better? Should it be in the loop?

ANSWER:
You can set up a loop with the Decimator G String as follows: Plug your guitar directly into the Guitar IN. Insert your pedals between Guitar OUT and Decimator IN. Guitar OUT to the first pedal in and then your last pedal out to the Decimator IN. Then plug the Decimator OUT into your guitar amp. This will put your gain pedals in a loop of the Decimator and it will remove all of the gain noise from these pedals.

 


 

QUESTION:
I’ve just got myself a Decimator Pro Rack G and I LOVE IT! Great unit! The only snag I’ve hit is the power adapter seems too big to fit between a single rack space in to my power conditioner.  I DO already have a Visual Sound 1Spot adapter (plus the little adapter plug that allows it to plug into any line 6 stompbox/Decimator) that seems to fit perfectly between two rack units on the back. I haven’t actually tried it because I don’t want to fry my Decimator.  I’ve read that it draws roughly 800ma. The 1Spot is 1700ma. Do you think it would work? If not, do you guys know of an alternative way to make it work? I’m trying to use a small rack right now.  Thanks for your time!

ANSWER:
Please note the Decimator ProRack G is powered with a 9 volt AC adapter not 9 volt DC, so, if the One Spot adapter is 9 volt AC output at 1700 milli-amps you will be fine. We ship a 2000 or 3000 milli-amp adapter with the unit which helps ensure a long life for the power adapter. Since the unit pulls about 800 milli-amps, you want to go over by at least 50% to avoid overheating the adapter, which will cause failure.

 


 

QUESTION:
Is it possible to change the channels on the THETA Pre Amp Pedal with pedals g-lab gsc3?

ANSWER:
The THETA has two jacks on the back that allow the unit to switch between GAIN 1 and GAIN 2 and also allows you to switch PREAMP ON / OFF and DISTORTION ON / OFF.  You need to control these with switch closure.  Many MIDI controllers offer MIDI control functions to control channel switch functions, this is the same control needed to switch the THETA preamp functions I describe above.

 


 

QUESTION:
I have a JCM 800 Bass Series which does not have an effects loop. Can the Theta PreAmp Pedal be used like a stomp box through the front end of an amp? Will it sound as good as it would through the power amp section?

ANSWER:
You can use the THETA preamp pedal into the front end of an amplifier without any problem.  You just want to set the amp for clean and without any EQ if possible.

 


 

QUESTION:
Is there a particular footswitch I should use with the Beta Bass Preamp to turn the compressor / exciter on and off? Do I need a double or could it work with a single footswitch?

ANSWER:
You can use any of the standard latching switches that are sold at all of the guitar stores to switch channels on your amplifier.  If you want to control both functions on the Beta Bass you will need a dual switch.

 


 

QUESTION:
I have a quick question regarding the Stealth amp.  I have a rather complicated stereo (guitar) rig, and was wondering if you have any experience or feedback from users who have tried the Stealth with (1) a Barber Electronics Barb EQ pedal as a pre amp tone shaper, or (2) an Ethos Overdrive pedal doing the same.  A lot of the guys on different guitar/gear forums (I frequent jazzguitar, tdpri, gearpage, etc) have commented that the Stealth would be a good consideration, among other “amps.”  The jazz guys seem to like the Barb EQ in front of a Henriksen guitar amp, but I play fusion as well as straight ahead archtop type jazz, so I am looking for flexibility that is lighter and more portable than my old Fenders (the Barb EQ simulates Fender voicing).

So, I hope maybe someone has tried either of these combos (I couldn’t find anything in a thread or on YouTube demoing or describing these specifically), and you can comment.  I do own a Decimator pedal, so I know you make well built stuff.  I am aware of the Theta preamp pedal, and it looks interesting, but I am just looking at an amp at the moment, and wanted to ask for your thoughts on the above combos.

ANSWER:
You should not have any problems running this setup.

 


 

QUESTION:
Can I run the Theta pedal into an Electro Harmonix 44 magnum power amp with good results?

ANSWER:
The THETA pedal should work fine with the Magnum 44 since the THETA has variable output level it will drive almost any power amplifier input without any problem.

 


 

QUESTION:
I have the Decimator G-String. Do I connect the guitar to guitar in and the guitar out to the amp and then the effect pedal or something equal to the Dec In and Dec out? Is that right?

When I do that, there is no sound coming out from the effect pedal and no signal is going to the amp. I tried this setup with two new pedals from the shelf and had the same problem.

ANSWER:
The easiest way to test the G String pedal is to take a distortion pedal and insert it as follows: Guitar to Guitar IN, Guitar OUT to the distortion pedal IN, Distortion pedal OUT to Decimator IN and Decimator OUT to the input of a guitar amp. This will set up a loop with the G String and confirm if the pedal is working. You can also simply insert a jumper cord between Guitar OUT and Decimator IN and use Guitar IN and Decimator OUT for the connections and it will work just like the standard Decimator pedal.
I tell customers who are having problems with the loop on their amp to do this simple test to determine if their loop is a series loop, which is needed for the Decimator to work in the loop.
1. Make sure the loop is turned on if there is a switch on the amp or a footswitch required to activate the loop.

2. Inset a patch cord in both Send and Return of the amplifier’s loop but do not connect the other end of these cords, just let them float not connected to anything.

3. Play the guitar and if the loop is a series loop you will not get any signal from the amplifier. Now connect a patch cord between the Send and Return and the sound should return.

This test will confirm if the amplifier loop is a series loop. If you break the Send / Return signal and you still get sound then the loop is most likely a parallel loop, or the loop is not active due to a defect. The Decimator can only remove noise from the signal passing through the Decimator so it will not work with a parallel loop since a parallel loop mixes the loop return signal with an internal direct signal like two channels on a mixing board.

 


 

QUESTION:
Can we use the Stealth Power Amp in stereo with a 2×12” cabinet in 2 x 16Ohms ? A customer has a 2×12” Blackstar cabinet, in 8 Ohm mono and 2x16Ohms stereo. Can he use his Stealth power amp in stereo 2 output ?

ANSWER:
The Stealth Power Amp will work with a stereo 16 ohm load–it will just provide a lower output level than it would if it were connected to a 4 or 8 ohm load.  I believe the output power will be approximately 30 watts at 1% THD and about 45 watts at 10% THD.  There is not problem for the Stealth to operate with this load and in fact the Stealth will run with very little heat into this load impedance.

 


 

QUESTION:
I am new to guitar power amps so I don’t understand what the power ratings mean in the Stealth manual. I plan starting using the Stealth with a single G112 cab so I understand I can safely plug the output 1 to a speaker while output 2 is disconnecte. Today I just read this:

OUTPUT POWER MONO
4Ω=75WRMS@1% THD/ 90WRMS@10%
8Ω=45WRMS@1% THD / 60WRMS@10%

1.- Does this mean that the Stealth will send 45 or 60 Watt rms to a 8 Ohm speaker thru stereo channel 1 or 2?
2.- Does this mean that the Stealth can send more power to a 4 Ohm speaker than to a 8 Ohm spekaer? If this is correct then does that mean that a 4 Ohm speaker will be louder than a 8 Ohm speaker with the same power rating?
3.- Manual states each stereo output can be connected to 4, 8 or 16 Ohm speaker but the power rating does not describe how much power it will send to a 16 Ohm speaker. Could you please clarify?
4.- I know your G112 cab has a Celestion G75T but I am asuming it is 8 Ohm and I have not seent it on any spec from any online dealer. Can you please clarify?

ANSWER:
This means that if you use just channel 1 the output power into an 8 ohm load will be 45 watts RMS at 1% distortion.  You can also use the Bridge output and drive the input of channel 1 and you will get the 150 watts into the 8 ohm load.  If you are using a G112 you should be fine to use the Bridge mode output and get the higher power output.

 


 

QUESTION:
I have the Theta pedal and the Stealth power amp running mono into a 212 mono Avatar cab. Ready to pull the trigger on the Impression but worried about the stereo outs.  Can the Impression run mono? Thanks for your time. Absolutely LOVE the tone I am getting with this set up!!!

ANSWER:
There is no problem using the Impression in Mono, you just use one of the outputs.  We have many players using the Impression in a Mono rig.

 


 

QUESTION:
What would be the placement order for the theta on a traditional pedal arrangement? Wah -> fuzz -> Distortion -> amp in and FX loop amp send -> chorus -> delay -> reverb -> amp return. Where in the chain would the Theta fit? I would also like to take advantage of the Decimator in the Theta so I would imagine the preamp would also be on where I could just have flat eq.

ANSWER:
I would recommend that the THETA be in the chain first unless you prefer the sound of you wha pedal in front of your distortion, which most do.  I would then go guitar into Wha into THETA and then into your other pedals.  If you are still going to use the distortion pedal you have then you can put it in front of the THETA and use the Decimator but it will be a different decimator threshold setting required for a pedal distortion than it will for the THETA distortion.  You can switch on the THETA clean preamp and then use the decimator in the clean channel but it will require a change in the threshold setting to make this work.  I would then leave your other effects in the loop as you describe.

 


 

QUESTION:
I have nice reverb and delay pedals that I run through the effects loop on my amp. The problem that I have is that neither the reverb or delay have the ducking or dynamic feature.

Can I use Decimator G-String to duck or side track my reverb and delay? I want the reverb and delay to soften as I play notes and then return to full between notes.

ANSWER:
Unfortunately, the Decimator will not function as a ducker just a single ended noise reduction system.

 


 

QUESTION:

Can the Impression pedal’s channels/effects be controlled by a MIDI controller?

ANSWER:
The IMPRESSION does not have any control connections that would allow MIDI control. The original design concept for the IMPRESSION was to make this pedal as simple to use and offer just the basic main effects that player is looking to use. Most players are using the IMPRESSION for fly dates that gets them the basic effect they need for a gig.

 


 

QUESTION:
Is there a buffer in the Decimator G-String pedal, and if so where is it placed?

ANSWER:
The Decimator G String does not have a buffer between Guitar IN and Guitar OUT. We did this so as to avoid any noise intrusion between the Guitar output and the input of the rig being used. With extremely high gain rigs even a buffer amplifier can add more noise than the straight guitar signal. We use a very high impedance tap of this Guitar IN signal to derive the Decimator control signal right from the Guitar. There is a buffer between the Decimator IN and Decimator OUT so even with the G String switched out there is a Buffer in this signal path.

 


 

QUESTION:
For the Theta, what is its adapter jack and polarity? Is the DC plug center positive or center negative? What are its dimensions?

ANSWER:
The THETA manual specs are shown below:
Input Impedance

Maximum Gain PREAMP+ DISTORT

Treble Control /PREAMP

Treble Control /DISTORT

Bass Control /PREAMP

Bass Control /DISTORT

Mid Sweep Frequency /PREAMP

Mid Sweep Frequency /DISTORT

Mid Boost/Cut Range /PREAMP

Mid Boost/Cut Range /DISTORT

Decimator Effective Noise Reduction

Dimensions

Weight

Power

500k ohms

Greater than 150db

+/-15db at 10Khz

+/-15db at 10Khz

+/-15db at 80Hz

+/-15db at 80Hz

300Hz to 6KHz

300Hz to 6KHz

+/-12db

+/-12db

Greater than 80db

7” x 5” x 1.9”

2.2 lbs

9VAC External Adaptor

You can see the power is listed at 9VAC. This is 9 volts AC not DC and there is no polarity with AC since this is alternating current, not Direct Current.
Again from the manual:

The Power Jack is connected to the supplied 9VAC power adapter. The THETA pedal internally converts the 9 volt AC signal from the power adapter to a professional +/- 15 volt DC power supply. This allows a 30 volt internal signal swing required for proper headroom and professional level performance. The THETA pedal will only operate on a 9VAC power source, do not use any other power adapter or damage may result.

You need to either use the 9VAC adapter supplied with the unit or use one of the available power suppliers that offer 9VAC with a minimum of 800 milliamps available current.

 


 

QUESTION:
Will the ISP Theta Preamp Pedal will work with a CIOKS AC8 power supply?

ANSWER:
I looked at the CIOKS website and it appears that the AC8 power supply should power the THETA Pedal. It shows on the picture 800 by the two AC outputs 7 and 8. I cannot find a download for the manual so I cannot confirm that both of these AC outputs are 800 milliamps but this is what it looks like from the data on their website. You will want to use the output 7, which shows 9 volts AC NOT output 8, which shows 12 volts AC and you should be good.

 


 

QUESTION:
Is it safe to have the Stealth disconnected from a speaker while an input is still feeding? For example, input one? Will this damage the unit?

ANSWER:
There is no problem if you run the STEALTH power amp without a load on one or both of the output channels. Unlike most Tube amps where a load is recommended the STEALTH will work without any issue.

 


 

QUESTION:
What is the best way to connect the pedals to my amp? The amp comes with FX loop but currently my new setup is running everything upfront. I only want to gate my drive pedals and vibe.

The pedals in use are as below:
Strobo Stomp tuner > Timmy Overdrive > Animal Overdrive > Simble Overdrive > MXR Vibe > Strymon Timeline > EBS Dyna Verb.

I reckon the connection using ISP G String 2 should be as the following steps:
1. Guitar > ISP G String 2 Guitar in
2. ISP G String 2 DEC IN > Strobo Stomp tuner > Overdrive pedals > MXR Vibe > ISP G String 2 DEC OUT
3. ISP G String 2 Guitar out > Strymon Timeline > EBS Dyna Verb > Amp input

ANSWER:
You want to set up a loop with the G String as follows:

Guitar to Guitar IN on Decimator G String
Guitar OUT on G String to your Tuner > Overdrive Pedals > MXR Vibe.
Output of MXR Vibe to the input of Decimator IN
Decimator OUT to Strymon Timeline > EBS Dyna Verb > Amplifier input.

This will put the Tuner, Overdrive pedals and MXR Vibe in a loop of the Decimator G String and will apply noise reduction to just these pedals. The output will drive your Strymon and Dyna Verb without any truncation of the delay or reverb and the output of these effects will feed the input of your amplifier. The loop of the Decimator G String is between the GUITAR OUT and DECIMATOR IN.

 


 

QUESTION:
Are the distortion channels basically just distortion pedals, not really a full “preamp” unless you combine the preamp channel in? And to switch between just distortion to just preamp, do I have to hit two buttons or does turning off distortion automatically engage preamp?

ANSWER:
There are two sections to the THETA Preamp Pedal. The Distortion channel and a Preamp channel. Both have a full EQ section so you can use the THETA as both your clean channel by using the Preamp section for your clean tone and then use the Distortion channel for your high gain distortion tone. Or you can use the Preamp section to overdrive the input of the Distortion channel if you want “over the top gain”, which would dedicate the THETA pedal to your high gain distort sound. The distortion channel has plenty of gain, which allows you to use the Preamp for your clean tone and the Preamp for your clean channel. You can listen to any of the Ethan Brosh videos on line (just do a search for Ethan Brosh), he is using the THETA with just the distort channel for his high gain and says he does not need any more gain by using the preamp as an overdrive. Ethan did the entire tour as the opening act for Yngwie Malmsteen using just the THETA pedal for both his clean and distortion sounds.

Here’s just a couple of links for Ethan THETA demos:
http://www.youtube.com/watch?v=cu09b6HNse4
http://www.youtube.com/watch?v=ztNLNG-LRnc

Regarding switching, you are correct that you would need to switch Distort OFF and Preamp ON to change between the two but we’ve had a number of players make an external footswitch that plugs into the back control jacks and allows one switch to change between the two channels. You can take one of the standard one button switches for amp channel switching and make this footswitch if you prefer to change between the two channels with a single button.

Here’s a schematic for the THETA Pedal Remote PreAmp / Distort Switch:

THETA PEDAL REMOTE SWITCH SCHEMATIC


 

QUESTION:

I run my pedal board into my HiWatt style amp. The Theta Pedal interests me but my amp already has a preamp so when I see that in the title of this pedal I wonder is itst right for my application. I’m just trying to find a high quality distortion pedal. I don’t need any extras. Let me know if I am misunderstanding this pedal or if you have a simple high gain distortion pedal in your line up.

ANSWER:
The THETA pedal can be used in several ways including set up as your high gain distortion pedal.  We designed the pedal with both a preamp and distortion channel.  Some players use the preamp as the clean channel in their rig but the Preamp can also be used as an overdrive for the distortion channel for over the top gain or if the distortion channel has enough gain for your playing style you can just use the distortion channel.  Many THETA users will put the THETA in front of their amp and use it just like any other distortion pedal but we have received countless emails and calls from guitar players who bought the THETA Pedal and claim it is the absolute best guitar tone they have ever had.

 


 

QUESTION:
I am really interested in the rackmount ISP Decimator but have one question. I play with a ton of gain and thus a ton of noise.  I really want to eliminate the noise but I use a lot of the “good” feedback in some of our songs.  Is it possible to set the thing up to eliminate noise but still be able to let the amp feedback when needed?  I have no idea if it is possible to really have your cake and eat it too with feedback but if anything can it seems the Decimator might be able to.  If not I can always just get the pedal and turn it off when I want to feedback…just looking at options…

ANSWER:
The Decimator will not cut off any desirable feedback and this is why.  The Decimator is a below threshold downward expander, when you play and let a note decay down into the noise floor the guitar signal will drop below the threshold you set on the threshold control.  When the guitar signal goes below this threshold the expander will exponentially increase the expansion as the signal drops below this user-defined threshold.  When you get sustained feedback (good feedback) between the guitar and amplifier this is a high level note that is sustained and turns into feedback.  This signal is far above the threshold set point and the Decimator will not affect this high level feedback.   It will however eliminate the unwanted feedback that can occur when you stop playing because this will show up after you stop the strings from vibrating.  This type of feedback will actually build up from a short stop in playing.  While this squealing type of feedback seems to happen immediately when you stop playing it actually occurs several milliseconds after you stop the strings from vibrating.  Since the Decimator expander responds in less than a millisecond it will attenuate the signal before this unwanted feedback can start to build.   It will attenuate the signal passing through the Noise reduction and as a result eliminate the unwanted feedback since the signal is attenuated by upwards of 80db.

 


 

QUESTION:
Will the Theta Pre Amp Pedal work in front of my Carvin TS100 tube power amp? Will it function as a regulalar preamp?Is it powerfull enough?

ANSWER:
The THETA pedal can be used as a stand-alone preamp pedal or line a distortion pedal. It will work at lower levels like a distortion pedal or with a higher level output like a preamplifier. You would not have any problem using the THETA in front of you Carvin amp and it will have the required output to drive the amp directly.

 


 

QUESTION:
Is the Stealth designed to be connected directly to a guitar pedal (instrument level) or is it designed for line level input?

ANSWER:
Both. The input level range on the Stealth power amp should allow it to work at both lower levels for direct pedal outputs and also for line level signals.  The only thing you need to be aware of is you typically want some preamp between a direct guitar output and the power amp when you are in clean mode so you may want something for EQ on a clean signal.

 


 

QUESTION:
Can your Steve Luthaker, Vector 112, or Vector 212 subwoofer systems add low end to a bass-anemic system or do they only work with what they are given?

ANSWER:
That’s exactly what it was designed for. You want to look at the Vector 210 or the Vector SL. There is a price difference so if you are using a low watt amplifier the Vector 210 will be an excellent fit.

 


 

QUESTION:
I have a brand new Diezel VH-4 head. I use an ISP Decimator G String II. When I plug it like the manual says, and when the noise gate is not active, I have a huge hum when using distortion channels. As far as I remember, I had not this issue on my old Peavey Triple XXX.

Is there another way to plug the Decimator G String II so there’s no hum?

ANSWER:
It sounds like a ground loop unless there is an extremely bad hum but you said when the Decimator is active the hum is gone so this does sound like a ground loop.  You can try the following, connect a guitar cable between GUITAR OUT and DECIAMTOR IN.  Then plug your guitar into GUITAR IN and from DECIMATOR OUT go to the input of your amp.  This will give only one connection between the Decimator and your amp.  The pedal should give you noise reduction only on the guitar signal and won’t remove any gain noise but if this works and there is no noise in the amp I think we have a ground loop.  If this works then you need to take two of your cables and remove the ground connection on one end.  Most players leave the GUITAR OUT ground connection since this will give us the first ground to the input of the amp and cut the ground connection on one end of the two cables that connect to the loop of the amplifier.  This will break the ground loop and will still give you a shielded cable on the loop connections.

 


 

QUESTION:
I’m currently looking to buy a Decimator. I had an older version in the past when I used to use high gain but my rig has changed now. I don’t have an effects loop but I do have a noisy delay pedal. I was wondering if I put the Decimator after the delay, will it cut the repeats off in any way?

ANSWER:
The Decimator will work if you put a regular Decimator after the delay. That way the level detector will be after the delay and it will see the signal from the output of the delay. It will slightly attenuate the soft repeats as they decay down but it should be fine. If you used a G String and put just the Decimator block after the delay it will cut off the repeats as soon as you stop playing since the level detector would be reading the direct guitar signal. If you want to allow the repeats to trail off after you stop playing then you want to use a regular Decimator and put it after the delay.

 


 

QUESTION:
I can’t seem to get the Decimator Pro Rack G set up correctly. I had the original G String Decimator and we replaced it with the rack and cant get it dialed in. Are there any tips or additional troubleshooting you can provide?

ANSWER:
You want to take the output of your wireless receiver and feed the input of channel 1 of the Decimator ProRackG then the output of channel 1 should feed the input of you pedal board.  You want to feed the un-altered guitar signal out of the wireless into the input of channel 1 so it will track the direct guitar signal.  The insert channel 2 in your effects loop or after you gain stages.  This will allow both channels of the Decimator ProRackG to track the direct guitar signal but channel 2 will be inserted after your gain to remove any noise at the end of the chain before the power amp section.  Most will insert effects like verb or delay after the second channel to avoid cutting off repeat echos or reverb tails.

 


 

QUESTION:
I recently bought the Stealth Power Amp and I’ve a question for you. I bought this unit because I designed simple, easily portable and lightweight rack for the gigs my band is due to play next year. Basically I don’t need a 4×12″ guitar cabinet and I’m planning to use a 2×12″ cab with this unit. Generally speaking, 2×12″ cabs in the market today are offering just 120w to 160w power handling and I’m wondering am I able to use just one channel of the amp to run my 2×12″ cab. I’m using Fractal Audio Axe FX II MKII as a preamp, keeping all quiet and controllable with Decimator 2 pedal and powering the whole rack with Furman PL-8CE Power Conditioner. Thanks for your help and I truly appreciate your business!

ANSWER:
There is no problem to power a 2×12 cabinet with a single channel of the STEALTH.  In fact, you should not have a problem using mono bridge mode if you need more power since most speaker will handle close to 2x the rated RMS power.  You just want to look at the impedance of the cabinet.  The most power in Bridge mode is 180 watts into an 8 ohm load and 90 watts per channel stereo into a 4 ohm load.  Let me know what impedance your cabinet is and I will be happy to give you more input on setting up your rig.

 


 

QUESTION:
Which position should I put the Decimator 2 on? I have:
comp-Ts9-mainDist1-mainDist2-EQ-Volume-Chrous-Dleay-Reverb.

Should I put on this before Volume? or before Chorus? which way is the best?

ANSWER:
Put the Decimator before your volume control for the best tracking.  If the Decimator is after the volume control it would require a threshold change when you change the volume setting since the noise floor from the other pedals will change.

 


 

QUESTION:
Will the G-String work with no issues if I were to hook it up this way instead of the recommended placement where it’s at the end of the chain? The G-String will always be on, so will my clean sound be affected?

Guitar -> Tuner -> Compressor -> Phaser -> Guitar input of G string -> drive pedals in G String loop -> G String out to delay -> amp

ANSWER:
You do not want to put any other signal processor between the Guitar and Guitar IN on the Decimator.  The Guitar IN needs to see the direct guitar signal to track correctly.  If you put a compressor before the Guitar IN the compressor will constantly change the noise floor of the Guitar signal since it will be change the gain between the Guitar and the Guitar IN on the Decimator.  You want to go Guitar to Guitar IN and then Guitar OUT to the input of your system.  Then to your pedals and then to the Decimator IN.  You want the delay after the Decimator to avoid cutting off delay like in your information below but note that there is not active electronics between Guitar IN and Guitar OUT so there will be no change in the sound of your signal and no change in the noise level.  The Decimator Guitar IN needs to see the direct signal from the guitar to track correctly.



QUESTION:

I want to run both my ISP and delay pedals both through the amp effects loop. Can this be done or will not be able to work this way? I like to use it this way as my delay is clear through the effects loop. Rather then in line when I use the dirty channel on my amp.

ANSWER:
Many players are doing exactly what you are looking to do by putting the Decimator noise reduction in the effects loop and then putting their delay and or reverb in the loop after the Decimator.  So you would connect send to the Decimator IN, Decimator OUT to the input of the echo or verb and then echo or verb output to the return.  If you use a Decimator G String you would put the DEC IN and DEC OUT in the loop and connect the Guitar IN and Guitar OUT at the front end of your rig right between the Guitar and the input of your rig.  This will allow the echo and or verb to spillover in the background when you stop playing.



QUESTION:

I live in Italy and I’ve just purchased a STEALTH PRO from Thomann from Germany. The poweramp works perfectly, but when I turn the volume to zero, there’s still a little signal flowing to the cab, and if I strum my guitar you can hear just a bit of sound coming from the speakers. I’m using a zoom pedalboard as a pre for my sounds. Is it normal? I know that it happens sometimes with some kind of amps and I was wondering if this is typical of the STEALTH PRO.

ANSWER:
This is normal, the level control is designed to match the output reference level of the driving unit so it does not go all the way to zero.



QUESTION:

Just got a question about the Stealth power amp. If using in stereo and the cabs are different (one 8 ohm, one 16 ohm for example) will that put strain/damage the unit at all?

In my band our other guitarist and I both run through my AxeFx II and currently use a Matrix stereo poweramp. My signal goes out output 1 and his output 2. The Matrix doesn’t care if the ohmage’s aren’t the same. It’s not super common that the cabs at the venues are different but odd occasion they are.

We don’t need to drive the cabs super hard cos our tones go direct to FOH from the AxeFx. The cabs are just for a bit of on-stage sound/vibe.

ANSWER:
There is no problem running a different impedance on each channel.  The one with a higher impedance will just have less output power but no problem with the Stealth.



QUESTION:

My amp is a 66′ reissue of a Vox AC30 and there is no effects loop on it. For overdrive I use the Paul Cochrane TIM and the Fulltone Fulldrive 2 Mosfet.  My Guitar is a Tele Thinline that I’ve put Seymour Duncan Stacked P90s in.  Is there a benefit to using the G string over the standard Decimator II if I don’t have an effects loop? (Meaning I run straight from Guitar, to pedal board, to amp)

ANSWER:
You can make a loop with the G String and insert your overdrive pedals in the loop.  This will eliminate the noise going into the amplifier and will not require any threshold adjustment when you turn on and off the overdrive pedals.  This will give you the best performance without a loop built in the amplifier.


QUESTION:
I’m running a line 6 HD500x and I have a 2X12 cab with 2 vintage 30 Celestion speakers (8 Ohms each). Can I use the Stealth Power Amp with this? Would I need to re-wire the cabinet?

ANSWER:
You can drive an 8 ohm load in mono bridge mode for a maximum power of 180 watts or you can drive two 4 ohm speakers in stereo mode for 90 watts per channel or if you use two 8 ohm loads in stereo you will get about 50 watts per channel.  It sounds like you should not have a problem with this setup.

 


 

QUESTION:
I whant to know about the ISP Technologies Stealth Power-Amp Stereo. I know that it can be used at stereo mode and mono-bridged mode. But can I connect only the channel 1 input from my preamp and use only one channel output? like channel 1 output? Is for use it in mono mode but with less Watts than mono-bridged mode. thanks in advance for the support!!

ANSWER:
You can use just one channel without any problem.  You are correct this will give you less power but you do not have any issue if the second channel is not connected.

 


 

QUESTION:
From what I’ve seen on your website, the Prorack G is similar in its principle to the G string pedal, i.e that only line 2 acts as an attenuator and line 1 is used solely for tracking. Correct me if I’m wrong please.

 

If I need noise elimination both at the front end of the amp after my pedalboard and in the fx loop I understand that I will need 2 Decimator II units or a Prorack G with the stereo mod. Am I right?

ANSWER:
The G String is a single channel of Decimator that is controlled by the direct guitar signal and you are correct, the Decimator NR is controlled by the Guitar IN signal but there is no noise reduction between the Guitar IN and Guitar OUT.  This just allows us to read the un-altered direct guitar signal to control the Noise Reduction in between the Decimator IN and Decimator OUT connections.  If you want a channel of NR at the front end and one in the loop or after your gain you can either use two standard Decimator pedals with a LINK cable between them or you can use the ProRack G.  Two standard Decimator pedal linked with allow the second channel to track the direct guitar input so you don’t need to switch off the Decimator when you go from high gain to clean.   The ProRack G has two channels with one between the direct guitar input at channel 1 and a second that you can insert anywhere in the signal chain.

The ProRack G Stereo MOD is a two channel unit with a separate GUITAR IN and GUITAR OUT so this unit allows you to place both channels of Decimator anywhere in your signal chain.  Most people buy the Stereo MOD for true Stereo rigs so you can track the direct guitar signal and still have two channels of NR to place in a stereo signal path.

 


 

QUESTION:
Does the stealth power amp have enough power to use for bass.

ANSWER:
The STEALTH is a 150 watt at 1% and 180 watt at 10% THD amplifier.  There are many bass guitar amplifiers that are between 100 and 150 watts so the STEALTH will work for a lower powered bass system without any problem.  You simply need to make sure you have a 8 ohms speaker load that you are driving with the STEALTH and connect it in MONO Bridge mode.  This will give you the maximum output power possible.

 


 

QUESTION:
I am based in the UK and on Monday I received my ISP Decimator G String II that I ordered from my nearest ISP dealer which is Thomann in Germany.

However, whilst the pedal is fantastic and everything I was hoping for, it has a loud popping noise that makes it unusable unfortunately. I would therefore like some advice regarding the pedal and whether I should  return it and ask for a replacement or just get a refund.

Ultimately, with everything connected and the pedal off everything is fine but as soon as I switch the pedal on I get a popping noise every time a fret a note or contact the strings with the right hand. The only way to get rid of this is to either reduce the threshold to where the pedal doesn’t actually do anything or to increase the threshold to the point whether the
notes are so dramatically cut off it is not usable. Anywhere in the range of -20 to -50 produces the popping noise when a note is fretted or the strings are touched.

I really love the pedal but this issue makes is it unusable and this happens on both clean or gain channels. FYI, I am using a Randall RD20h into an Orange cab with an isolated and independent power supply. The chain used is guitar to guitar in on the pedal and then guitar out to a Seymour Duncan 805 overdrive then to amp. The effects loop send then goes to the dec in and then the dec out goes to a Hall of Fame reverb and DigiDelay then to effects return on the amp. However, I have also run the pedal on its own and with no other pedals and have checked the other pedals individually in the loop and upfront. However, the only time I ever get the popping noise is when the Decimator pedal is engaged, whatever combination or pedal arrangements I try. As soon as the decimator is switched off everything is fine again. I even tried running a pedal between the guitar and the decimator, changing guitar volume, gain and channel settings and nothing has an effect. Even on a completely clean channel with the guitar turned down and no effects pedals used the popping is exactly the same sound and volume as the gain channel cranked with pedals upfront and in the loop.

I do want to keep the pedal as it is transparent and cleans up the sound brilliantly but this popping noise just makes it unusable. Is this a faulty unit or is this a feature of pedal? Please can you advise so I know whether I should get a replacement or refund from the dealer.

ANSWER:
Let me know how you have the pedal connected and to what other gear.  It’s possible that you are clipping the pedal if it’s in a loop that is too hot of a signal level.  It should not be a problem since we seldom see a setup that will clip the pedal.  The maximum input level is approximately +9dbU so this is great headroom for a -10db reference signal level but not enough for a +4db reference level.  I would try to connect the pedal as follows just for a test.  You can connect a jumper cable between Guitar OUT and DECimator IN and then plug your guitar into Guitar IN and DECimator OUT to the input of your amp.  The Decimator G String will work just like the standard pedal with this jumper connected and this will allow you to confirm if the pedal is still causing the noise you described.  If the pedal still has the noise then there is a problem with the pedal.  If it works like this then I will guess you have are overdriving the pedal where it is inserted in the signal path.

 


 

QUESTION:
I’m planning on using an ISP Decimator II or two in my rig. I will either use the G-String and put my dirt pedals in its loop, or two of the non-G-String versions: one directly after my guitar, and the other after my dirt pedals with an 1/8th inch RTS cable linking them. However, I was wondering if it makes sense to get one G-String and one non-G-String while I figure out the best way to set up my rig. I can think of two examples of how I could do this. First, I could run my guitar into the non-G-String and link it with a G-String that has my dirt pedals in its loop. Second option, I’m wondering if I can run the G-String the same way you run the non-G-String?

For example, could I run my guitar into the non-G-String, then put the G-String (in series) after my dirt pedals (linked to the non-G-String), not using the G-String’s loop? Or would I be better off with two non-G-String Decimators if that is the setup that works best for my rig?

ANSWER:
The only advantage of using a G String and Standard Decimator pedals linked is that you can setup a true stereo operation.  You can do everything you need with two standard Decimator pedals except place two blocks of Decimator in your signal path at any location.  Using two standard Decimator pedals you can put the first one after your guitar output and place the second one after your gain pedals or in an effects loop and the second pedal will track the direct guitar input so you do not need to adjust your threshold when you switch from high gain to clean.

 


 

QUESTION:
I have an old Marshall JMP 100W amp/cabinet set-up and a standard (analog) pedal board – no effects loop on the amp and no loop function built into the board.

Which ISP noise reduction product is best suited for this ‘straight line’
set up and should the recommended product go at the end of the pedal chain, or only after the most noise producing effect (i.e. the distortion pedal)?

I see lots of advice on line for looping scenarios with your products, but nothing for my more basic set-up.  I play mostly hard rock/metal in the band, so I have distortion, reverb, flanger, compressor/sustain, octave unit and echo on board.

ANSWER:
You would be best to use the Decimator G String and set up a loop.  You can insert your distortion and other pedals between the GUITAR OUT and the DECIMATOR IN.  This will allow you to switch on and off any gain, overdrive our distortion pedals in this loop and never have to adjust the threshold of the Decimator.  It will clean up any noise from your guitar and any pedal in the loop.

 


 

 

QUESTION:
In stereo, would this work? OK into 2 x 16ohm cabinets (each cabinet containing 1 x 12″ speaker)?  If so, what power would you expect per channel into 16ohm? I’m trying to keep the size of the rig as small (and light) as possible.

ANSWER:
The Stealth will work fine using two 16 ohm cabinets in Stereo.  The power into a 16 ohm speaker in stereo would be approximately 35 to 40 watts per channel based on the actual impedance.  The Stealth will deliver 90 watts per channel into 4 ohms, 60 watts into 8 ohms and about 35 or 40 watts into 16 ohms stereo.  In mono bridged you will get about 106 into a 16 ohm load. Speakers all have a sensitivity rating so how loud it will be is in part based on the sensitivity of the speaker.

 


 

QUESTION:

I purchased the ISP Pro Rack G on eBay and I just found out that it does not have a Ground Lift switch.
Is this an old version? By the way, I installed it into my rack case. I got the ground loop hum noise. How can I fix this?

ANSWER:
It looks like a early model without Ground Lift switches.  You can make ground lift cables by cutting the ground connection at just one end of the cable.  This will do the exact same thing as the Ground lift switches.  You need only one ground connection between each piece of equipment connected in a system so you can look at how your unit is connected and remove all but one ground connection to eliminate ground hums that are caused by ground loops.

 


 

QUESTION:
I am gonna hook up my rig with an ISP Decimator II G-string. So I want to know: what is value of “input impedance of Decimator II G-string Dec in”, and “output impedance of Decimator II G-string Dec out”?

ANSWER:
The input impedance for both the Guitar IN and the Decimator IN is 1 meg ohms. The output impedance for the DEC OUT is 100 ohms.

 


 

 

QUESTION:
Is there anything I should remember when using the Decimator II or Decimator G String II?

ANSWER:
When using a Decimator II or Decimator G String II, always remember  to check the polarity of the power adapter being used to externally power the unit.  The Decimator II and Decimator G String II use a negative center on the barrel connector.

 


 

 

QUESTION:
I have a Stealth pro power amp and there is no issue at all when I use it in a rack system with a Mesa preamp and a TC multi effect unit, but I recently tried to use it with a pedalboard, including a floor tube preamp. The sound is really good but there is a hum because nothing is grounded in this configuration. So I’d like to ask you some advice. I have noticed that the noise can be cancelled if I run a wire from a metal part (for example a jack chassis) somewhere to the AC outlet ground connector. Do you recommend this or something else as a valid and safe solution?

ANSWER:
The STEALTH is powered by the external power supply like a laptop computer. This adapter does not have a ground pin on the input side only a hot and neutral. As a result there is not a ground connection between the STEALTH ground and earth ground like you would have with a grounded power plug.

When you connect the STEALTH with another unit that has this earth ground it is connecting the STEALTH circuit ground common to the earth ground via the ground of the MESA or TC power pin. When you connect the STEALTH to a pedal board and there is no other unit in the system with any earth ground reference it should still be quite if all of the grounds are common in the system. If you still have a ground hum and it does eliminate your hum when you run a ground wire from the earth ground of the AC outlet to the common ground of the pedal system this is NOT a problem as long as you are careful to only connect to the ground of the AC outlet. This is in fact making your system safer since you have now tied your system ground to the same potential as earth ground via the AC outlet ground. One note to be aware, the STEALTH input 1 and 2 and the chassis are at ground but both the output of channel 2 and the bridge output negative connection on the 1/4 inch jack is the inverted output swing of channel 2 so make sure to use a chassis connection or the ground of input channel 1 or channel 2 or the chassis of the STEALTH.

 


 

 

QUESTION: 
What’s the difference between the old Stealth Power Amp and the new Stealth Ultra Lite?

ANSWER:
The new Stealth Ultra Lite is a mono channel, 90 watts RMS into a 4 ohm load, or about 60 into an 8 ohm load. The Stealth Pro is 180 watts bridged into the 4 ohm load or 90 watts per channel if you run it in stereo (it’s a 2 channel unit).

 


 

 

QUESTION:
Can you use the STEALTH ULTRA LITE as a poweramp only? Can I run another preamp into it?

ANSWER:
The STEALTH ULTRA LITE is a power amplifier with extra gain on the input so you can increase the level of pedals in order to drive the amplifier to full output.  You can turn this level down and use the ULTRA LITE as a straight power amplifier with any other preamplifier and the unit also has bass and treble if you need to enhance the tone.

Just for your reference, the STEALTH power amplifiers are not CLASS D and have considerably better sound than the new small CLASS D amplifiers starting to appear on the market.  All of the small CLASS D amps we have listened to lack the full rich tone of the STEALTH power amplifiers. The STEATLH power amplifiers are based on our patented class A/B / Class H technology that has the warm analog sound and clip naturally for great guitar tone.

Share this with a friend...Share on FacebookTweet about this on TwitterPin on PinterestEmail this to someone