Hey i have :
-Kicker CVR104 (07CVR104) 10" Dual 4 ohm CompVR Series Car Subwoofer
-Pioneer DEH-4300UB
-(4)Sony XS-GT1626A (2 for the front and 2 for the back).
-Kicker ZX400.1 (10ZX400.1)

Well my problem is that there is bass coming from the rear to speakers but no actual music, just the bass. And the only thing the Head unit has is Balance, no fader. The Balance is for the Front 2 speakers only tho, no option for the rear comes up. Come some one please tell me or try to figure out what is wrong.