The question most often asked:
Short answer - No.
Second -most-often asked question - Why?
Answer - The Gainmaster is a floating front end to the Powers of Ten amp.
It is not a pedal.
It will not make another amp sound like a Gjika amp.
It is not sold separately.
No... why, you may ask?
I am not a copycat, or clone builder of other people's designs. All my amps are of my own design.
It takes a lot of time and money invested to design a great amp.
Changing the number of tubes in the amp, or any other thing, for that matter, means, to me, a total redesign.
The 10^n is a very high power 4 power tube single-ended amplifier. from this format alone, you have probably never played through anything similar. Building single-ended amps of this power is hard to do,. That is why you will not see, or have never seen from the past, this type of design readily available.
This particular amp is a no-holds-barred example of this design concept. So this amp runs at a very high current. I could go on and on about specifics, but I won't, because all you have to do is play through it, to be blown away by this concept in guitar tone.
Because you only need 2. Let me give you an idea of my design concept in relation to tone controls... You can give me any amp to play through, ranging from a good one, to one that sounds like total crap, and for a given volume that I would be asked to play through one of these amps, there will be an exact way for all the poorly-designed controls to be set, for me to get the optimum GUITAR TONE out of this amp, at the volume I'm expected to play it.
So now, if I am at a gig, and I am at one volume level at sound check, and for some reason, when it's time to play, I am being told to turn up or down, I am going to feel the need to re-adjust the whole EQ rack to match this volume change.
So what I give you on my amps, is the ability to match a great GUITAR TONE in relation to EQ, to the volume level you are expected to play at, with only one control. So if you memorize where you like that control set, in relation to where your volume control is set, life gets real easy. So of course, me being a purist type of designer, why in the world would I want to send my signal through a whole bunch of extra parts, such as potentiometers and other tone-robbing components? The only reason I can think of is if I was not actually an amp designer, but instead, just a guy who copies the same old designs that never satisfied, anyway.
An example I can give you of this type of copycat nonsense, with the same thing over and over again, from amp builders, would be a standby switch. There is no practical use for a standby switch on a tube amplifier. It actually causes harm to your tubes. The original guy put one on his amps without knowing this, and everyone keeps copying it over and over again.
I have discussed this in some of my videos, in context. Most people ask this question out of relevant context. The answer to the RELEVANT question is that it is as loud as you will ever need, or as quiet as you will ever need to be, with all the raging driven amp sound you can imagine, thanks to it's design, alongside that of the Gainmaster.
Due to the unique design of the 10^n, standard wattage numbers do not answer that question adequately, I know that annoys some people, so they can come over and demo it, therefore answering the question for themselves.
Is it loud enough - YES.
Is it quiet enough? - YES
The 10^n is not limited by music genre - it is the most responsive amp with the most pure vocal tone. The fat harmonically-rich guitar tone that the 10^n can provide, with your skills, is unmatched, regardless of your chosen style of playing.
A message to all aspiring amp cloners:
Please do not waste your time or mine, asking for a schematic for this amp, or any of my original designs, because that's not going to happen.