Bill I have used the Bose Compact $995.00 for almost a year. I found no need for the larger unit. The Compact is not stereo – is very light --- can be used with three heights for the column. I love it; I am no longer searching for a better unit.

Two Channels:
1-Is for vocals ONLY. It has Bass and Treble and Volume controls.
2-Offers no bass or treble controls – It does offer a volume a mode switch if you are playing guitar – and an impute for an IPod or CD player.

Many of the Yamaha players want stereo – I find no need. There are highs from the column speakers and there is the sub for lows, but mid-range is a bit lacking. I have been using the EQ in my Pa800 to add mids. A mixer would be a good add-on. I did not buy the Bose mixer unit, it was half the price of the Compact.

My bottom line; When I plugged the Kn7000 into the Bose I could not believe the clarity. I was able to hear every little aspect of the Kn7000. A mixer would warm the sound if one desired.

My recommendation for would be to buy one with a return privilege. You will not be disappointed.

There is also a learning curve Bill. Where to place it? Deciding the amount output of the keyboard; I find that it makes a difference – and I am not talking about distortion. I do find that the volume does not change to a large degree from the front of a room to the rear of the room.

Hope this helps, John C.