Well - here's an interesting question. I just acquired a used SWR Bass 350 head. While the tone of the amp is good - it's not 'my' tones; the tones I created with my ADA MB-1 programmable preamp. The SWR Bass 350 has no PA input to bypass the internal preamp. Meaning, my only option is (apparently) to run the output of the MB-1 preamp into the preamp stage of the Bass 350 and then out through the chain....etc. This does work, but I find that the preamp on the Bass 350 clips with the gain past about 11 o'clock and the PA section does the same at 11-12 o'clock. This is to be expected, given the set up. The question is (you electronically inclined folks) that, assuming I am happy with the sound I am getting now without the Bass 350 amp or preamp going into clip, is a resistive pad in line with the connection between the MB-1 and the Bass 350 input the way to go to damp down the input signal to the preamp section of the Bass 350? I am stumped to come up with another solution short of modifying the amp and adding a switch and jack to disable the Bass 350 preamp and use the MB-1 direct to the 350 PA section. This could be done, but I'd rather leave the amp stock as I am not convinced it's a keeper. Thoughts?