I used a pair of Bose L1's for several months...absolutly astonishing stereo sound, and a very useful stereo seperation.

Yamaha insists that I use a stereo system for my demos and clinics...I use a Yamaha Stagepas 500 or 300.

Stereo also lets any voices with stereo dependent effects, sound as they were meant to sound.

Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.