Gary & Donny, please, if at all possible, be sure to take your Yamaha PSR2000/2100 keyboard over to the Uncle Dave show tonight and have him (or you) play the stereo 'Live Grand' acoustic piano voice going out mono to one Bose PAS, and report back what 'you' think it sounds like. Be sure to remember to play the keyboard with varying playing dynamics (loud, medium, and soft) as well. Thanks. - Scott