i've got an eclipse xa4000 4 channel amp i've had for a while now and its beyond me what is wrong with it. channel one is louder than channel 2 and 3 and then channel 4 doesn't even work at all. i knew the 4th channel was messed up for a while but the 1st channel is decently louder than the rest. how is this possible? the head unit fader and balance are at 0. its connected to the unit with 2 sets of rca's just like any ol amp. the 4th channel i can get over but with that 1st channel like that i guess i'll have to get a new amp all together now?