Hi Larry,

From what I can make out, after attempting to blow up the pic more in Photoshop:

KN7000 Rear View (audio inputs/outputs: from left to right):

1) Mic input
2) Line IN (right/mono)
3) Line IN (left)
4) Aux IN (right/mono)
5) Aux IN (left)
6) Sub (or line?) OUT 2
7) Sub (or line?) OUT 1
8) Main OUT (right/mono)
9) Main OUT (left)

I assume that the Main OUTS are used for sending the primary 'main mix' out of the KB as stereo audio. I'm speculating that the Sub OUT 1 and 2 would be used if you wanted to send your vocals or a specific track(s) such as drums or bass, out independently. Perhaps someone who knows for sure can clarify.

I like the KN7000's feature of offering 2 stereo (Line & Aux) inputs.