So currently my main amp is still my Deville 4x10, and lately it's been sounding not so fresh. Well, now that I know how amps work, I figured rebiasing it wouldn't hurt. Well, sure enough, it was biased a little cold - I couldn't really crank it to get a feel for how it sounds now because i'm doing this in my apartment, but from what i could tell it sounds a lot warmer, which makes sense. Next practice will tell...
anyway, this brings up another point - when i had the tubes replaced on this amp, i took it to a prominent local tube amp repair place to have the work done. Now I won't name names, but the place is in south jersey. when i got the amp back, one of the speakers was blown. Now i'm not saying they did it, but they definitely should have caught it. Anyway, one of the things I paid for at the time was for them to put high-quality tubes in the amp - and i paid $100 extra for this.
The tubes in my amps are regular Sovteks. Nothing special, and $24/pair tubes. So not only was this guy incompetent, but also dishonest.
Let this be a lesson! Know your amp tech, and get some background information on them if you can! If you're replacing your power tubes, you DO need to have the amp rebiased. This is NOT something you should do if you don't know what you're doing because we're talking about serious voltages that can kill, but if you want to here's a link that explains how to do it.
Of course, I'll be happy to install your tubes and bias them for a nominal fee, and I also won't rip you off on the tubes. I'll even give you a link to a place to check the prices on them.
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