I tried that monster Tube Amp yesterday using my Rickenbacker 4001V63 Bass, matched with a 410 cabinet. This is quite the machine I should say, with tons of warmth and I especially digged the dirty channel mixed with the clean channel. It has a wonderful overdrive Tone !!! The compressor, 10 band EQ, bright, Deep and tuner features really make this a versatile Tube amp, in my opinion. It has so much power too !!! Anyone ( who needs a "back" relief, cause these are heavy !!! ) has one for sale in good condition ???? Let me know !!!!