Sony XM-GS6DSP Mode D'emploi page 12

 High level input connection 
(with DSP enabled/2ch mode)
With the speaker connection  (page 14)
White
White/striped
Gray
Gray/striped

12
GB
Front speaker
output (left)
Front speaker
output (right)
 High level input connection 
(for Subwoofer BTL system/6ch mode)
With the speaker connection  or  (page 14)
White
White/striped
Gray
Gray/striped
Green
Green/striped
Purple
Purple/striped
Brown
Sky blue
Brown/(black) striped
Brown/(blue) striped

Note
If subwoofer outputs are not equipped to your car
audio unit, use this unit as a 4ch amplifier, or make the
connection in 2ch mode () instead.
Front speaker
output (left)
Front speaker
output (right)
Rear speaker
output (left)
Rear speaker
output (right)
Subwoofer
output