[m330d]

Hi there. Few months ago I bought bmw 330 e90 2006 ( audio bmw navigation professional ). From the moment of purchase I found, that subwoofers doesn't work. Radio is working good, music quality is also good. I checked all radio fuses - all working. I read, that it can be amp problem. If it possible, to check yourself if amp is good or not? If yes, how to do it? Or maybe it can be other reason, why bass doesn't work?

[ctuna]

Identify which system you have .
The base system has very little power .
And the front channel has to drive both the under seats and
the doors .

If you have Hi fi it has a weak amp that really doesn't put out
much bass. Or offer any fidelity if you turn it up.

If you have Logic 7 you should have some bass.

The head unit does not describe which sound system you have.

BMW stereo types
http://www.e90post.com/forums/showthread.php?t=352586
http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.e90post.com/forums/showthread.php?t=343673
http://www.e90post.com/forums/showthread.php?t=138949
http://www.e90post.com/forums/attach...1&d=1209780605
http://www.e90post.com/forums/attach...1&d=1209780865
http://www.e90post.com/forums/showthread.php?t=641323
http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/
http://technicpnp.com/menuDiagrams/d...e90_92_93.html
http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...3&d=1169133185
http://www.e90post.com/forums/attach...4&d=1278871872

[m330d]

I have HiFi system. Also I found, that all speakers gives some little bass, but subwoofers under seats doesn't work. They don't give any voice.

[ctuna]

That system is way under powered and the speakers aren't that
good either.
As and experiment fade all the way to the front and try turning up
the bass and putting your ear next to the under seats.

HI Fi upgrades
http://www.e90post.com/forums/showth...ighlight=level
http://www.m3post.com/forums/showthread.php?t=540446
http://www.e90post.com/forums/showth...hlight=technic
http://www.e90post.com/forums/showthread.php?t=532585
http://www.e90post.com/forums/showthread.php?t=833581
http://www.m3post.com/forums/showthread.php?t=443043
http://www.e90post.com/forums/showthread.php?t=324214
https://www.bimmer-tech.net/blog/ite...-audio-for-bmw
http://www.e90post.com/forums/showth...hlight=level+3

[m330d]

Original subwoofers under seats show give some bass, right? Maybe I should clean them, or something? Probably I will have just to upgrade my audio system.. Thanks for info!

[zakchary]

Originally Posted by m330d

Hi there. Few months ago I bought bmw 330 e90 2006 ( audio bmw navigation professional ). From the moment of purchase I found, that subwoofers doesn't work. Radio is working good, music quality is also good. I checked all radio fuses - all working. I read, that it can be amp problem. If it possible, to check yourself if amp is good or not? If yes, how to do it? Or maybe it can be other reason, why bass doesn't work?

I have HiFi system. Also I found, that all speakers gives some little bass, but subwoofers under seats doesn't work. They don't give any voice.

[zakchary]

Originally Posted by m330d

Hi there. Few months ago I bought bmw 330 e90 2006 ( audio bmw navigation professional ). From the moment of purchase I found, that subwoofers doesn't work. Radio is working good, music quality is also good. I checked all radio fuses - all working. I read, that it can be amp problem. If it possible, to check yourself if amp is good or not? If yes, how to do it? Or maybe it can be other reason, why bass doesn't work?

Original subwoofers under seats show give some bass, right? Maybe I should clean them, or something? Probably I will have just to upgrade my audio system.. Thanks for info!

[ctuna]

I found the orignal subwoofer give so little output as be almost non existent.
Well if you stick your head next to you can vaguely hear it's working.
But maybe it's my hearing as far as the level.
And the Hi Fi system in genral falls right apart when you turn it up at all.
Forget driving with the Windows open it's not and option.

Try fading all the way to front and playing with the bass and treble.

[nonford]

If all else fails, I have a Hifi amp with working subwoofers,,,,,,