Larry - I run the K7 into a stereo channel on my mixer. The mixer main outputs run into my 400watt sub. The sub has a built in crossover network set at 100hz. The left crossover sub out goes to a 60watt speaker on a stand and the right crossover sub out goes to a 60watt speaker on a stand on the other side. This produces a very good sound. However, I programme at home in my garage with all the speakers set up and save the setting to SD card. On a gig, room response affects the sound at times and it's usually the drums and bass that need adjustment. Bass cut on the mixer helps a little but does alter the overall sound, not just the bass and drums volume. The separate sub outs seem not to be able to be set for midi part 2 (bass) or midi part 10 (drums). Therein lies the problem.

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Alan Minnear