W Audio MCA-4 Operation Manual - page 7
Operation Manual
page 7
2 Setup
Figure 2.2
Balanced Input
Connector Wiring
Figure 2.3
Unbalanced Input
Connector Wiring
Figure 2.4
Left: Normal Operation Wiring
Right: Bridged operation wiring
2.4 Choose Input Wire and Connectors
Recommends using pre-built or professionally
wired, balanced line (two-conductor plus shield), 22-24
gauge cables and connectors. Depending upon which
amplifier input you choose, you should use either 3-pin
male XLR connectors, TRS phone connectors, or terminal
forks at the amplifier inputs.
Unbalanced line may also be used but may result in noise
over long cable runs.
Note: Amplifier input connectors not used for audio signal
input may be used for daisy-chaining of the audio signal
to other components.
Figure 2.2 shows connector pin assignments for balanced
wiring, and Figure 2.3 shows connector pin assignments
for unbalanced wiring.
NOTE: Custom wiring should only be performed
by qualified personnel.
2.5 Choose Output Wire and Connectors
Recommends using pre-built or professionally
wired, high
quality, two- or four-conductor, heavy
gauge speaker wire and connectors.
Using the guidelines below, select the appropriate
size of wire based on the distance from amplifier
to speaker.
Distance Wire Size
up to 25 ft. 16 AWG
26-40 ft. 14 AWG
41-60 ft. 12 AWG
61-100 ft. 10 AWG
101-150 ft. 8 AWG
151-250 ft. 6 AWG
CAUTION: Never use shielded cable for output wiring.
4-channel amplifier
+
+
BRI
OUTPUT ASSIGNMENT
CH 1+ :
CH 1- :
SIGNAL
GROUND
CH 2+ :
CH 2- :
SIGNAL
GROUND
CH 1+ :
CH 2+ :
SIGNAL
GROUND
OUTPUT 1
OUTPUT 2
BRIDGE 1
CH 3+ :
CH 3- :
SIGNAL
GROUND
CH 4+ :
CH 4- :
SIGNAL
GROUND
CH 3+ :
CH 4+ :
SIGNAL
GROUND
OUTPUT 3
OUTPUT 4
BRIDGE 2
+