So my bassist ended up buying a used Traynor YBA 200-2 after trying out a YBA 250 at guitar center and falling in love with it. He met up with the guy at a halfway point so he didnt get to test it out before buying it. He got it back to our practice space and with the gain AND master both all the way up it just wasn't very loud. After a lot of messing with the eq and trying it through 2 different cabs (ampeg svt 2x12 and my cheap hartke 4x10) it still wasnt loud enough. For reference "not loud enough" means that even when cranked he wasnt audible over me or our drummer. I turned my volume down to half of what I normally play at (4 as opposed to 8 on my 60w 6505 2x12) and he still wasn't audible. We decided to take a look at the tubes and the power tubes all APPEAR to be good, however the V3 tube in the preamp (12au7) isn't glowing, but also produces no noise when we did the "pencil test" on it. I'm assuming that since it's not glowing like all the other tubes it's gone bad. Now, I think I have a rough idea of what the phase inverter does (sends the signal from the preamp to the power amp ?) which leads me to believe that that could be causing the volume issue, though I could be wrong. So, I guess my questions is, Is it possible that a bad phase inverter tube cause the low volume problem, and if so, would playing the amp in it's current state cause any potenial damage? and if that's not the case are 200 tube watts just not enough for a bass amp? I know bass amps are typically rated for higher wattages because bassist need more clean headroom, and because it takes more watts to push the low end frequencies. Any help is appreciated.