[Manbearpig]

Hi guys, I drive a 2011 e92 335i and am loving it. After hours of searching for which speaker setup I have I can simply not figure it out.. anyways here are some pictures. My question is my bass. The bass is extremely weak and im questioning whether my sub under the seat is blown or not. In addition the rear deck speakers are only shells and are completely empty as I bought the car used. Perhaps this lack of speakers is effecting my bass? I am unsure what speakers are currently in as all of them were changed and I bought the car used, I wanted to know what my options were as far as increasing my bass. Thank you.

[bmw325i]

The rear speakers will not really make a difference. Is there an amp anywhere in the trunk? Looks like someone installed some aftermarket equipment and didn't do a very good job. You need to figure out which oem system your car originally had.

[ctuna]

Those pictures aren't stock speakers
I suspect you don't have a stock system.
And if the speakers aren't stock probably there
are other modifications.
Or did you do that yourself?
Looks like somebody hacked the system and the doors
then maybe removed some stuff.
ditto on what bmw325i said.