Aside from the Mono issue.....which I could live with if necessary....although some KBs handle the stereo phase issue better then others...For me it "wasn't the sound" at all....with some EQ'ing & if needed added second Sub I got it to where I could make it work.....but more of the personally aggravating time consuming 4pc setup and having to squeeze it all in to those tight covers with zippers over & over again besides all my other equipment,....remember this many times is 2 or 4 x a day....when you have to run to the next gig with 1 hr to spare.