Gain Control
If the sound level is too low, even when the volume of the car stereo used along with this power amplifier is turned up, turn gain control clockwise. If the sound distorts when the vol- ume is turned up, turn the gain control
•When using with an RCA equipped car stereo (standard output of 500 mV), set to the NORMAL position. When using with an RCA equipped Pioneer car stereo with max. output of 4 V or more, adjust level to match the car stereo output level.
•For synced amplifier’s gain control, see the “Setting the Gain for synced amplifier” sec- tion.
BFC (Beat Frequency Control) Switch
If you hear a beat while listening to an MW/LW broadcast with your car stereo, change the BFC switch using a small standard tip screwdriver.
HEAT Indicator (Yellow)
This indicates a problem with the amplifier. See the “Troubleshooting” section on page 17 for details.
PROTECT Indicator (Red)
This indicates a problem with the amplifier. See the “Troubleshooting” section on page 17 for details.
Power Indicator (Blue)
The power indicator lights when the power is switched on.
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Subsonic Select Switch
The subsonic filter cuts inaudible frequencies below 20 Hz to eliminate unwanted vibrations and minimize power loss.
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