2007 BMW 335i Sedan: No Bass Sound

RevALot · 04-10-2017, 08:24 PM

Greetings:

I have a 2007 BMW 335i Sedan and the bass sound just went out. All the other speakers in the car function properly. I believe I have the HiFi Premium system (tweeters in the front doors).

Based on my research on this forum, I may need to replace the subwoofers underneath my front seats.

What would be the best subwoofer replacement for the OEM subwoofers? I've been looking at the following replacements:

- Bavsound Ghost Underseat Subwoofer, 8 ohm pair
- Rockford Fosgate T3-BMW-SUB
- Just replace with plain old BMW OEM Subwoofer

Which speaker do you think would be best? Do you have any other options?

Thank you in advance for any advice you can provide.

yipronny · 04-10-2017, 09:24 PM

depends how much you want to spend,

for a budget price, alot of people seem to find good results with the sws8 earthquake subwoofers.

ctuna · 04-10-2017, 10:23 PM

RevALot · 04-10-2017, 11:00 PM

Quote:

Originally Posted by ctuna

l confirmed this evening I have the Logic7 system. I have the "Cinema" and the "EQ" options in the menu.

ctuna · 04-10-2017, 11:36 PM

From the documents above the stock speakers are 4 ohm for
the L7. So you need to match that but you also need to make
sure the channels are working. I would go for an aftermarket
amp for those if you expect any kind of output from them though.

I would expect the amp went bad before the speakers went bad.
Unless liquid was spilled on both speakers.

Try playing with the L7 options turn of modes and adjust according to the L7 sticky.

http://www.e90post.com/forums/showthread.php?t=161120

RevALot · 04-11-2017, 12:35 AM

If all the speakers in the car give good audio except for the subwoofers, how is it the amp has gone bad?

Appreciate your advice. This is an area (among many) that I know nothing about.

ctuna · 04-11-2017, 12:55 AM

Do you know anything about amplifiers and what an amplifier
channel is. Each channel is assigned to a separate speaker and each
channel has a separate power chip these days instead of power transistor.
Its possible that if could be further back in the amp than that .
The only way you will know if its the amp is to take the speakers out an test them.

http://www.e90post.com/forums/showthread.php?t=1144129

04-10-2017, 08:24 PM	#1
RevALot Enlisted Member 10 Rep 39 Posts Drives: 335i Join Date: Jun 2012 Location: USA iTrader: (0)	2007 BMW 335i Sedan: No Bass Sound Greetings: I have a 2007 BMW 335i Sedan and the bass sound just went out. All the other speakers in the car function properly. I believe I have the HiFi Premium system (tweeters in the front doors). Based on my research on this forum, I may need to replace the subwoofers underneath my front seats. What would be the best subwoofer replacement for the OEM subwoofers? I've been looking at the following replacements: - Bavsound Ghost Underseat Subwoofer, 8 ohm pair - Rockford Fosgate T3-BMW-SUB - Just replace with plain old BMW OEM Subwoofer Which speaker do you think would be best? Do you have any other options? Thank you in advance for any advice you can provide. Last edited by RevALot; 04-10-2017 at 08:30 PM.. Reason: Added text "8 ohm pair".
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04-10-2017, 09:24 PM	#2
yipronny Private First Class 30 Rep 162 Posts Drives: 2012 e92 Join Date: Mar 2015 Location: Planet earth iTrader: (0)	depends how much you want to spend, for a budget price, alot of people seem to find good results with the sws8 earthquake subwoofers.
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04-10-2017, 10:23 PM	#3
ctuna Lieutenant General 1926 Rep 13,134 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	You must make sure of which sound system you have both the Hi Fi and Top Hi Fi (L7 have tweeters) The L7 has a center dash speaker and graphic eq controls. Somewhere I read that the 07 came with L7 in the US. 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.bmwmotorsports.org/pdf/e7...%20Systems.pdf 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.bmwmotorsports.org/BMW_docs/mostbus.pdf http://www.e90post.com/forums/attach...4&d=1278871872 The Hi Fi amp really does not have enough power to drive aftermarket speaker or even the stock ones.
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04-10-2017, 11:36 PM	#5
ctuna Lieutenant General 1926 Rep 13,134 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	From the documents above the stock speakers are 4 ohm for the L7. So you need to match that but you also need to make sure the channels are working. I would go for an aftermarket amp for those if you expect any kind of output from them though. I would expect the amp went bad before the speakers went bad. Unless liquid was spilled on both speakers. Try playing with the L7 options turn of modes and adjust according to the L7 sticky. http://www.e90post.com/forums/showthread.php?t=161120 Last edited by ctuna; 04-10-2017 at 11:42 PM..
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04-11-2017, 12:35 AM	#6
RevALot Enlisted Member 10 Rep 39 Posts Drives: 335i Join Date: Jun 2012 Location: USA iTrader: (0)	If all the speakers in the car give good audio except for the subwoofers, how is it the amp has gone bad? Appreciate your advice. This is an area (among many) that I know nothing about.
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04-11-2017, 12:55 AM	#7
ctuna Lieutenant General 1926 Rep 13,134 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Do you know anything about amplifiers and what an amplifier channel is. Each channel is assigned to a separate speaker and each channel has a separate power chip these days instead of power transistor. Its possible that if could be further back in the amp than that . The only way you will know if its the amp is to take the speakers out an test them. http://www.e90post.com/forums/showthread.php?t=1144129
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