Pioneer GM-2000A Owner's Manual page 3

@ Gain Control
If the output is low even when the volume of the car stereo is turned
up, turn this control clockwise. If there is distortion when the volume
of the car stereo is turned up, turn this control counter-clockwise.
@ Low Boost Switch
Press this switch to increase the volume of sounds in the low-fre-
quency range if your car audio system does not reproduce enough
bass sounds. This is effective when the amplifier is used to drive a
sub-woofer.
e If there are no low-frequency sounds in the music you are listening to, or if
you are using relatively smail speakers, this switch may not make much
difference.
@ Mode Select Switch
@ Load Impedance Select Switch
connected to this amplifier is less than 4 ohms.
© Power Indicator
The power indicator lights when the power is switched on.
HSIIDNA