I have a JVC KD-30 headunit. and ran it to two 3.5 JL'S, and two 6x9 pioneers. i have an 1100 watt xplod amp with a 15" audiobahn.
im positive that i have everything ran right and when i turn the unit on all i hear is bass from the sub and the 6x9's i get no treble. i've tried everything someone please tell me what to do im sure this has happened to someone.
if you have two RCA outputs on the unit you maybe only playing one of them. try to fade it(the RCA's). I did that on my kenwood, i had all of the output to the rear.