Harman JBL GX-A422SI, Service Manual

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10 10
CONTROLS, INPUT CONNECTIONS AND INDICATORS
SET THE CROSSOVER CONTROLS
2-CHANNEL OPERATION
Crossover Filter switch:
•
If you have connected the amplifier to a pair of 6" or smaller full-range speakers, set the Crossover Filter switch in the “HP” (high-pass) position.
This will limit the amount of low-frequency energy sent to the speakers, significantly reducing distortion and preventing the speakers from damage.
• If you have connected the amplifier to a pair of large full-range speakers (6" x 9" or larger) that can handle significant bass and you are not using a
subwoofer in the system, set the Crossover Filter switch to the "FLAT' (full-range) position.
• If you have connected the amplifier to a pair of woofers or subwoofers, set the Crossover Filter switch in the “LP” (low-pass) position. This will limit
the amount of high-frequency energy sent to the woofers/subwoofers, improving the clarity of vocals and other midrange sounds.
L+L–R–R+
Speaker-Level
Input Connector
Protection
Indicator
Line-level
Input Connectors
Crossover
Filter Switch
Bass Boost
Switch
Power
Indicator
Level
Control