when i have my double din at half volume, the RCA's lose connection with the amp or something because the bass fades to a stop then i raise it one volume level up and it works then fades, i have to blast the radio so it will not fade. i have a ken-wood ddx418 double din, 2 kicker comp 15, one Sony explod 12, 1 kicker cvt comp 10, there all 4 ohm, single coil. i have them hooked up to a hifonics Brutus 25 anaversary 1600 2 ch mono block. the two 15's are to one channel at 2 ohms and the Sony and the kicker to the other channel at 2 ohms. but the amp drops them to 1 ohm,pls help im afraid im going to damage one of the things. i replace the ground, all the fuses and disconnected everything and connected it back together twice already.