Klipsch Subwoofer Amplifier Service Manual KSAMM-002a
OTHER FEATURES
This amplifier uses a control circuit to control the operation of the output relay. When
power is first applied the circuit provides a delay before activating the relay. This is a protection
feature to protect the speaker and amplifier from initial current surges. The circuit also provides
protection from over-current conditions by de-activating the relay when excessive output current is
sensed. The relay and it’s control circuitry is located on the Filter/Driver Board and consists of
U11, U12, RLY 1 and R131. R131 is used to set the threshold level for over-current sensing.
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