Pioneer GM-7150M Service Manual - Page 32

4 3 2 1 GM-7100M/XU/EW 32 F E Power Indicator The power indicator lights when the power is switched on. LPF (Low-Pass-Filter) Cut Off Frequency Control You can select a cut off frequency from 40 to 240 Hz. 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 on the front of the power amplifier clockwise. If the sound distorts when the volume is turned up, turn the gain control counter-clockwise. • 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. • If you hear too much noise when using the speaker input terminals, turn the gain control counter-clockwise. Bass Boost Control You can select a bass boost level from 0, 6, 9 and 12 dB. For instruction of connecting the bass boost remote control to the amplifier, see the "Connection Diagram" section. D C B 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. A 8. OPERATIONS (GM-7100M/XU/EW) 4 3 2 1