ive noticed a decrease in Gain and low end from my amp lately, same guitar just the amp, i was wondering if this would be a problem with the pre amp valves or the pot amp ones?
I think it's probably your preamp tubes if you're losing gain. Often if it's power tubes you'll lose volume as well. How long has it been since the tubes have been changed?
Sounds like a preamp tube issue to me. I just re-tubed my mark IV for a similar issue. Amp was just sounding weak, and the EQ was all over the place. Put some fresh glass in it, and it's barking like a big dog again.
thanks guys, i am planning to re tube all of it, just funds are low at the moment, and i can only afford one or the other for now, and im not sure when the tubes where changed last, a year ago i think