hey guys i'm going to look at a friends setup tomorrow. he has 2 kicker cvx 12's 2 pioneer 800 mono drive amps eclipes deck and 2 1 fared capacitors hooked together with a bus bar. he had a friend hook it up for him and when he runs one amp only he says it hits really hard but when they split the rcas and run both amps it dies off and the rear speakers are louder than the subs. i'm thinking the rca in the radio are bad but i'm not sure. i haven't actually looked at it yet but just trying to get some help before i look at it tomorrow. does anyone have any ideas for what i can look for or what may be a problem. thanks in advance

Andy