Hey Tony,
On my Korg PA 80 and my Yamaha PSR 750 there are left and right stereo outputs. On both keyboards the Left is labelled as L/mono. Does that mean that the keyboard already routes both channels to a combined mono output or would I be wise to plug a Y connector in to both outputs before plugging into the Bose?
As far as sending out a stereo sound image throughout the room you would never hear the stereo image like you do on headphones even if you were in the sweetest of "sweet spots"
All I know is what I hear from slightly behind and to one side (without feedback) from the Bose is the best sound I have heard from my setup. My friend checked it out in a church hall where I was playing. He told me the sound he heard from anywhere in the room was the same as what he heard when he stood beside the speakers. Combined with the fact that I was hearing myself better than ever before that info was enough to convince me to turn my rental into a purchase.
God Bless,
Don
Don ... I haven't really tested it with the KORG, but with my kn6000 I definitely heard a fuller, more rich sound using the Y connector and I have been doing that ever since, even when I went to the KORG ... I will have to give the KORG a test one of these days ...
As far as the sound disbursement of the BOSE, you are definitely correct, and I think that has been well documented ... I always do a sound check before starting a gig, and the very first time I used a BOSE - not mine unfortunately, just filling in for a friend at his steady gig - I put a midi file of "Breezin" on the kn6000 and as I walked around this long, fairly narrow room I was really amazed at how it sounded ...
When I am using 2 speakers (Podium 10's), I only hope the audience is hearing some of the same separation I am hearing ...