Biamp MCA Series - Manual (Page 9)

9
BRIDGING
Bridge DIP switches allow the adjacent odd/even numbered channels to be bridged together in
pairs, for a higher, combined output power (see Bridge on pg. 7). When a pair of channels are
bridged, their wattage is combined, but the minimum load increases to 8 ohms (MCA 8050 = 100
watts @ 8 ohms; MCA 8150 = 300 watts @ 8 ohms). Bridge disables the even numbered input,
and applies the odd numbered input signal to both amplifier channels. From the factory, Bridge
is bypassed (switches up). To assign Bridge to a pair of channels, move the related switch to the
down position. Connect the source signal to the odd numbered input channel, connect the positive
speaker line to the (+) output terminal of the odd numbered channel, and connect the negative
speaker line to the (+) output terminal of the even numbered channel (see diagram on right).
NOTE: Only adjacent odd/even numbered channels, which share a common Bridge switch, can be
bridged. When channels are bridged, the minimum load is increased to 8 ohms. The negative (-)
output terminals on bridged channels are not used (no connection).
2
1 2
outputs
level
signal / peak signal / peak
level
input input
HPF HPF
OFF OFF OFF
BRIDGE
source
signal
speaker
positive
speaker
negative
1