OK, I was really skeptical of all the hype I was hearing about the Thunderfunk TFB-420. I went ahead and bought one to try out, and all I can say is WOW.... I used it at rehearsal last night, plugged into an 8 ohm Mesa Road ready 4X10. My bass was a Lakland 55-94 with Barts. The bass and treble were both slightly boosted, which is how I have it EQ'd 95% of the time. I set the amp EQ flat, and I turned the enhance knob halfway up. When I played I was greeted with a sound that one of my bandmates described as "punchy bottom". I turned the "Timbre" knob one click to the left, and that was all I did to EQ the amp. The "Timbre" knob seems to be the trick to getting the most out of the amp, but I really haven't had it long enough to be sure. The amp handled everything I put into it, and was VERY quiet, just like I had read. This is really a great sounding amplifier! It's warm, punchy, and clear. I didn't believe what was being written about the amp sounding great with the EQ set flat, but it really does live up to the claim. I've been a Mesa player for years, but this just might put my M-2000's into retirement. Kudos to Dave Funk!