JBL 8, Service Manual

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Powered Subwoofer ARC SUB 8
CONTROLS AND THEIR FUNCTION
1. Output Level - The Output Level adjustment
determines volume level strength.
2. Crossover Frequency - The Crossover Frequency
adjustment determines the highest frequency the
ARC SUB 8 will reproduce. It allows a seamless
transition from the subwoofer to the satellite
speakers.
3. On (LED) - This LED will light green when the unit is
plugged in and is receiving signal. When in
standby mode the LED is red.
4. Low Level Input - These left and right Line Level
Inputs are normally used when the
receiver/processor has line-level pre-amp out
or subwoofer out jacks.
5. High Level Inputs - These High Level Inputs are for
receivers that do not have line-level pre-amp out
or subwoofer out jacks. When a pair of main or
satellite speakers are attached to the OUTPUT
terminals, frequencies below 180 Hz are attenuated
by the high-pass filter.