My speakers work on my car except for the back speaker that is in the middle. I have a both a extra speaker and a extra amplifier. I tried changing both and no different results.
I checked all the fuses in the driver side that came out all good , but not under the hood. All speakers work except my rear middle speaker in the back. If any one has anyh suggestions i appreciate it .

 

We might need a bit more information. Sedan right? What year? Bose system? What does this mean: "I have both a extra speaker and a extra amplifier. I changed both and no different results." How did you "change" them?

I'm going to guess ... that you are asking about a sedan with a Bose system and the subwoofer in the center of your rear deck is not working? If I'm guessing right, presuming the driver itself is not blown, that sub has its own little amp mounted on the back of the speaker's frame. I believe the power to that sub amp is different from the main Bose amp but I can't recall from which fuse it comes from. The main Bose amp sends low-frequency audio to the sub and also a 10V "on" signal so it only runs when the system is running. Check both fuses #5 and #8 in the fusebox near the driver's left leg. And then check fuse #34 in the IPDM (although other things wouldn't be working if that were blown). It would be great if it were just a fuse!

Let us know what you find.

 

Yes i have a 2011 infinity g37 sport
yes it is a bose system
when i said i have a extra speaker and amplifier i tried replacign both to see if i can get different results but everything came to be the same results at the end.
Im trying to find the little amp you are talking baou that is located in the back of the speakers frame but i dont seem to find it .
I checked the other fuses by the drivers leg and the fuses are fine

 

Here's a drawing of that speaker from the Factory Service Manual and a picture of what the back of it should look like. That bit of electronics on the back is the small sub amp I'm talking about. Does the one in your car look like this?

 

Yes i have the same exact one that is in the picture. The question i have is if the fuse amp is inside that silver/metal box.
I also wanted to let yo u know that i tried a whole other subwoofer and still ran into the same issue with it not working nor the front subwoffer aswell.

 

Here's a link to the Factory Service Manual for your 2011 AV system: Bose w/o NAV starts on page 222. Bose w/NAV starts on page 354.
https://www.nicoclub.com/service-man...F2011%2FAV.pdf
Below the "viewing window" on that page you can "Click here to download a copy" of the pdf.

The fuse that powers the subwoofer is #34 in the "Fusible Link" which inconveniently hangs off your battery's "+" terminal. See the illustration below. You can also check whether the pink wire in the sub's connector (like in the photo above) is showing +12V. If not, then find and check that fuse. Hopefully that's the simple answer to your problem!

Now ... not sure what you mean by the "front subwoofer" but if you're talking about the center dash speaker be aware that is a "full range" speaker and I can't say exactly what it is used for - possibly just phone calls. There are separate left and right subwoofers in your front doors.