Service Manual
Page 23
... the left ) OFF (center) HPF (right) Audio frequency range to the right. GM-X434,X334 23 For four-channel input, slide this switch to high-frequency range Speaker Type Sub-woofer Full range Full range Remarks Connect a sub-woofer. output of the car stereo is set to the Pioneer amplifier. If you use one input plug...
... the left ) OFF (center) HPF (right) Audio frequency range to the right. GM-X434,X334 23 For four-channel input, slide this switch to high-frequency range Speaker Type Sub-woofer Full range Full range Remarks Connect a sub-woofer. output of the car stereo is set to the Pioneer amplifier. If you use one input plug...