power LED
protection LED
ch 3/4 input level control
pb681X
ch 3/4 high level inputs
pb881X
ch 3/4 low level inputs
ch 3/4 crossover mode selector switch
ch 3/4 bass boost level control
ch 3/4 low pass frequency control
ch 3/4 high pass frequency control
speaker connections
features and controls
4 c h a m p P B 6 8 1 X • P B 8 8 1 X
ch 1/2 input level control
ch 1/2 high level inputs
ch 1/2 low level inputs
ch 1/2 crossover mode selector switch
10
ch 1/2 bass boost level control
ch 1/2 low pass frequency control
ch 1/2 high pass frequency control
power terminals
power fuse