Rane MA 6 1988 version - Manual (Page 10)

Diagram 2. Stereo Biamped Operation
The MA 6 will drive an active two way stereo system when wired as shown. The high-frequency
drivers are run direct from channels 1 and 2. The low frequency drivers, requiring much more
power, are then run from two bridged pairs: channels 3 & 4 bridged to one woofer and
channels 5 & 6 bridged to the second woofer.
CAUTION: 8 OHMS IS THE LOWEST IMPEDANCE THAT CAN BE DRIVEN BY THE MA 6 IN
THE BRIDGED MODE. IF THERE ARE TWO WOOFERS IN EACH BASS CABINET,
BE SURE THAT THEY ARE WIRED IN SERIES IF THEY HAVE AN INDIVIDUAL
IMPEDANCE OF LESS THAN 16 OHMS EACH.