Bill you'll never get stereo from a mono system......with that said I would suggest using two cables L&R outputs, to my ears most times it gives you a fuller sound, you can test this yourself,hook up both and while your playing remove the R/cable & listen close... & there has been talk of phasing problems with pianos with Yamaha units in previous posts too when using NON Stereo as a primarily a full KB Piano/arranger player check that out also.....I hope you played all your gear thru the Bose before you purchase it? Also why do you want global Reverb? Aren't all your registrations EQ'd properly part by part?

Anyway Good luck with your bew system & report back soon.



[This message has been edited by Dnj (edited 12-08-2008).]