I have a '21 SV, non-Bose system. My rear speakers are all but non-existent, and it's driving me crazy . If I send the audio to rear only, I only hear a faint sound coming from them, volume up high. I have the non-Bose system, but there is a center speaker up front. Front speakers seem to work fine. (no Sub behind the seat either) Thanks y'all!

 

So no one has dealt with this issue, or is this post not being seen??

 

Defective head unit, defective wiring to rear speakers, defective rear speakers.