when i hit a bump my amp shuts off and u have to hit it to make it start again whats up with that shizit i have it hooked up to 1 12 inch volfehag 1000max 500 rms subs dual voice coil 2 or 8 ohm operation double stacked magnets any info on whats wrong with my amp would b apreciated and when u turn it up to like 120 hz it only hits the lows thnx