The F900BT that I have used to be 100% functional with my 2 amps (mono and 4ch). but 2 days I ago I decided to sell the 4ch amp (JL 300/4) and now I installed another amp which is a 2CH and now everything wen't to hell.

 

Subwoofer bumps even tho its turned off in the headunit. I did reset like 5 times and still does the same thing. the alternator whine got worst. when I use a rca noise suppressor I lose all the lows and only hear the highs and echoes. And the subwoofer becomes twice as loud.

 

I am really pissed and I have no clue what happened. is there any chance I short circuited the radio? I really need help on this, please ask me details on what I did.

 

2006 Scion tC

JL 500/1

Fusion 2CH 300/2

F900BT

Kicker L7 2006 10"

Component speakers