Pioneer GM-D1004 Owner's Manual page 10

Section
03 Connecting the units
5 RCA cables (sold separately)
6 Car stereo with RCA front output jacks
7 Car stereo with RCA rear output jacks
Two-channel input (Stereo) / (Mono)
! Slide INPUT SELECT (input select) switch
to 2CH position.
! Connect to the RCA front input when using
it in two-channel mode.
10
En
3
5
1 INPUT SELECT (input select) switch
2 RCA input cord
To signal input terminal of this unit.
3 RCA front input
1
2
4