Audio issues- w/JBL

[Acer21]

Hey guys,

Hoping you could help me with a problem I've been trying to pin down.

2010 4Runner w/JBL.

The front door speakers and subwoofer does not work (very, very faint, but almost no sound coming from them).

I replaced head unit with a Pioneer Avic5201-NEX, still does not work.
Replaced speakers with 2oh speakers to match factory impedance, still does not work.

Are there fuses I could check?

I am really hesitant to start replacing Amps, unless I am sure the problem is with the amp. Any help you could offer would be appreciated.

 

[jhuerta22]

I'm having the same issue with my 4runner. Front door speakers have little to no sound except some bass. Not sure about the sub since I don't have my base turned up very high.