Question for Ampeg B25-B owners..........

[Fender4Me]

At what point does your B25-B break-up ? Mine is breaking up with the volume at about 9 o'clock which seem way too early to me. Thanks!

[JimmyM]

Sounds early to me too, unless of course you have an extremely hot bass or you're really cranking the lows. Might need rebiased or something.

[B25Expert]

I am no expert, but from my experience with these amps is that you may have your power tubes biased too hot, or maybe you even have a higher gain 12ax7 in your preamp. These are the first two things that lead to your premature distortions.

Ps. Mine breaks up at about 10:30 with JJ 7027As, a stock ampeg tube rectifier, and new stock ampeg branded 12AX7s.

[B25Expert]

I forgot to add that i use an active shecter bass with EMG humbuckers, so that may be why it breaks up at 10:30 instead of 11

[Fender4Me]

I am using passive basses through it. Everything is bone stock including the Magnavox tubes. I felt like it was breaking up too early and you guys have confirmed it. I'll take it to a tech for a check up. Thanks