Read JBL PSW-D112 (serv.man4) Service Manual online
NOTE: When testing the PSW-D112/DPS-12 amplifier, a load must always be connected to the
output terminals, whether the woofer, or a 4 to 8 ohm resistive load.
output terminals, whether the woofer, or a 4 to 8 ohm resistive load.
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