My Ibanez TSA15H does not satisfy me. I dont like its tone, either cleans or drives. I is hard to crunch, because it is set at a low bias in order do have headroom... but when I can achieve it with a booster, I just dont like it very much. Anyway, check this out http://www.youtube.com/watch?v=9uCbUjo7Tw0 , those are the stock tubes, 2 chinese 12AX7. Changing them will make a REAL difference?? THANKS AND KEEP ROCK AND ROLLING FOLKS!