Dell Inspiron 1764 Service Manual page 3

LAH-20 ALL MASTER SYSTEM with L
2) Each twisted pair must be connected to terminals #1 and #2, #3 and #4, #5 and #6, etc. Please refer to wiring diagram.
3) Wiring may be in a loop as shown above, or in a home-run manner.
4) We advise installing amplifier near the center of the system.
5) Connect the red and black wires within the amplifier to plus (+) and minus (-) respectively of the power supply. The
power supply may be mounted inside the amplifier cabinet.
CAUTION: DO NOT ATTEMPT TO CONNECT POWER SUPPLY TO LAH-20 MASTER STATION.
INSTALLATION FOR WALL MOUNTING
1) Attach the mounting bracket to wall or plaster ring.
2) Attach the master station to this mounting bracket.