I used to own a dual rectifier 3 channel and I had it retubed with JJ ecc83s preamp and Svetlana winged C power tubes. I used a Tonebone hot british pedal in the front end and a bbe sonic maximizer in the loop and it tightened up the channel 3 modern low end amazingly. There was absolutely no comparison between recording straight through the head and when using the pedal and maximizer. Unfortunately I had to sell it, but now I'm back in the market for a Mesa head. Can anyone let me know how the older 2 channel rectifiers and basically any other Mesa head compares with the low end tightness and gain. I play heavy progressive metal and need definition without losing low end. If I can get a head that is tighter to begin with I'll be in tone heaven!