Chas is right about the concerts - they are ALL in mono - not stereo. I used to help set up the band stands for many of them at the Maryland State Fairgrounds. Often dozen or more speakers, all huge, all out of the huge mono mixer board.

Gary cool
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)