tvro32
Junior Member
I have just installed a new alpine amp MRP-F300 with a pair of Alpine SPR-17C 6 1/2 2 way coaxial speakers. We used the speaker level inputs form the head unit. (BMW 325i 1994). At very low volume the system works great. But when turned up (Normal levels) the amp cuts out for 10 seconds then plays for several seconds before cycling again. The power feeds for the amp are 8 ga less tha 3 feet direct to battery. If I connect a pair for 6X9 8 ohm speakers to the amp (same channel) everything works great. The alpine speakers are listed as 4 ohm. Why would they trip the protection circuit in the amp?