I have a Rockford p400-2 amp. i was bridging it to two rockford p1's. and my amp just stopped working. now the left speaker input doesnt work.the right works fine. when i plug in the speakers to bridge it again it bumps for a minute then shuts off again. when i hook it back up it works for a lil bit again and sparks when i first plug it in. any ideas to fix dis?