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yeah its a combination of the linear volume control, a power amp that has gobs of negative feedback, and a preamp that really drives the crap out of the power section.
the lack of grid stoppers could be said to be an issue, but there are plenty of amps that are like the ampeg V4 in that regard. it certainly doesn't help, but I wouldn't call it a primary cause.
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That guys writes such great articles. I have always loved reading his stuff.
So in the phase inverter of the ampeg we do have high coupling cap values, but there are grid resistors there. 47k grid resistors. and the bias feed resistors are lower than they would be in a fender or marshall (100k in the ampeg vs 220k in the fender/marshall)
There is a lot of feedback in the power amp, the preamp does have a lot of gain, and of course the coupling caps could be dropped to .1uf or even .047uf without much change in sound.
If you are worried about this, change the coupling caps first. just my two cents.
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Guys, I have do what you said. I remove two tubes and switch to 4ohm. I also switch to -9db the input rocker switch. Everything before was amazing at the first time, then turned to be a little bit frustrating 'cause of the "unwanted distortions", but... now it's perfect! Thank you very much, soon as I can I'll do a recap job.
