So, I played live for the first time in 10 years this past weekend. I thought I had a pretty powerful, dependable set-up. Not quite as it turns out. I would have thought that my carvin R600 amp, coupled with 2 hartke cabinets --a 4x10 (no horn) and an 18" (+horn) would have provided more volume than I could have used without problems. Nope. I used the 4x10 for the high end and the 18" for the low. I got unwanted distortion and weird popping sounds. What did I do wrong? I should add that I ran the basses through a zoom 506 pedal and a sonic maximizer. Both basses were active, though I accounted for that. I also turned the tube section of the pre-amp off completely. Any thoughts would be welcome.