I haven't bought the multichannel extension yet (it's crazy that it's an additional cost, to be honest). I'm flipping back and forth between 2.2 stereo (MA1 Aligned) and 5.1 (unaligned) currently.
I have 3x KH120II, 2x KH750, 2x KH80. LR go into left sub, C and Lfe go into right sub. When...