Gen 2 NON JBL no audio from main speakers, low from tweets

hi guys,

I did a search before posting and didn't see anything i could identify with.

so about a month ago, the sound went out on my NON JBL stereo, all 4 main door speakers dont work, but if i crank the volume up to max, i can hear some audio from the 2 front door tweeters.

went to the junk yard and pulled some non jbl radios, all do the same exact thing, so im thinking there must be something else, it cant be my unit and 4 others have exactly the same problem. if these had such a common issue, i would think it would be plastered all over this forum.

is there something im missing? this is a plain jane gen 2, nothing fancy.

while im on the post, I have several gen 2 JBL 6 disc radios too, is there a way to modify a non JBL to have the 6 disc changer from a JBL?

thanks.

 

from my research, the only separate amp would be the JBL system, located under the passenger seat. i do not have such an amp or anything under either front seats. there is a nice beefy heatsink on the back of the radio, so i would assume it has a basic amp built in.

 

ok so today i took one of my door panels off, and checked the speaker resistance, the speaker is open, no resistance reading at all, so its bad.
went to the junk yard today with my multi meter, checked a Prius and 3 RAV4's (same speaker design)
the Prius had 4 Pioneer aftermarket speakers cobbled into it, all had 3.5 to 4 ohms
the rav4's were mostly bad too, no reading, open. so im thinking there must be a common problem with these factory speakers failing.

of the 4 RAV4's I got 4 good speakers out of 10

i plugged in one of the good speakers into my door and it works fine, so the issue is not the radio.

hope this thread will help someone in the future

 

I think what has happened, is one speaker failed at a time until the last one died and i really didnt notice until no sound.

 

pull the connector on the speakers and check for resistance...
I got averages between 3.5 and 4 ohms on my multimeter

heres a EASY video for removing the door panel.