OK so i have a 400 watt Optimist Bridgeable amp.Its a multi channel amp.I have no clue how to hook it up,It has 2 places for power and 2 ground and 4 places for RCA cable to hook up to.Im not worried about the REM right now though.Im trying to push 1 Rockford fosgate Punch HE with a peak of 400 watts.What should i do.Its farely new and the power light wont come on!PLEASE HELP!!