TO TURN ON SOUND: 1) RED BUTTON “ON” IN SOUND BOOTH; 2) TURN ON GREEN BUTTON ABOVE AMP’S (leave amp’s switched “ON” the GREEN button turns them ON and OFF); 3) WAIT 3 SECONDS THEN TURN LEFT&RIGHT VOLUME KNOBS ALL THE WAY CLOCKWISE (TWO KNOBS ON TOP AMP, TWO ON BOTTOM AMP). TO TURN OFF, 1) FIRST TURN DOWN VOLUME KNOBS COUNTER-CLOCKWISE ALL THE WAY, 2) THEN SWITCH OFF GREEN BUTTON ABOVE AMP’S; 3) SWITCH OFF RED BUTTON IN SOUND BOOTH