Hey guys , Im trying to run my front splits and my rear speakers of an amp. I conneceted the front splits and they work perfectly, but when i connect the rear speaker cables onto the amp the speakers cutoff and the sub is still playing. The specs of the amp that im running the speakers off are: GM-6300F 4-Channel Power Amplifier with 600 Watts Max. Power Bridgeable 4/3/2 Channel Capability 4 Channel Crossovers (HPF/LPF) Speaker Level Inputs 60 Watts x 4, at 4 ohms <= 1% THD+N 150 Watts x 2, at 4 ohms BRIDGE <= 1% THD+N 80 dBA Signal-to-Noise Ratio (Reference: 1 Watt Output) My splits are Alpine SPR-17s and my rears are sps-600. My headunit is a Pioneer DEH-3100UB And i was wondering if the problem was the amp or did i need a new headunt? Cheers, Peter.