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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Rattling trunk and new sub setup



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      07-29-2010, 07:37 PM   #1
Mauskar
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Rattling trunk and new sub setup

I have been reading these posts for awhile, and this is the first time im posting. I recently decided to add a sub and amp to my car to improve the bass response only to have the trunk rattle (ghetto bass up the ass). I want to conserve as much trunk space as possible, since I have a kid on the way. I have been looking through the threads and came across this link, but how do I know if I have a ski pass?: http://www.e90post.com/forums/showthread.php?t=341416

I also read about the SWS-8 upgrade. I guess my main question is what is the least complicated way (installation wise and time) to improve the bass response in my car?

My equipment is an Alpine Mrp-M500 amp and 12" Alpine 1241 DVC in sealed enclosure.

Any suggestion is greatly appreciated and thank in advance!
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      07-29-2010, 11:39 PM   #2
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any suggestions? Im kinda lost with all the posts. From cutting vents, to corner mounts, to using isobarics...
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      07-30-2010, 02:09 AM   #3
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I have 2 15's and honestly, my car doesnt rattle much at all.


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      07-30-2010, 10:34 AM   #4
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thanks for the reply. All I have is a 12" alpine type R in a sealed enclosure and it rattles when i turn the bass up with the bass knob i have. If i dont turn the bass up, then I cant hear it in the cabin cause of the insulation...

I dont want to just add layers of dynamat, and thought that maybe adding vent holes in the rear deck would work? Or should I remove the rear speakers first to see if that allows the bass to travel into the cabin?

So lost...
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      07-31-2010, 11:39 AM   #5
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?
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      07-31-2010, 08:13 PM   #6
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Quote:
Originally Posted by TMR View Post
I have 2 15's and honestly, my car doesnt rattle much at all.


Your setup pushes all the pressure into the cabin...thus why you don't experience much rattling. In a sealed enclosure, the box rattles, and the front of the sub rattles (obviously because of the sub), and anything the box is touching , also vibrates/rattles. Also, depending on the sealed enclosure, all the pressure is stuck in the trunk. I have a zenclosures box and it pretty much sealed to the back seat. I do leave it about an inch and half away from the backseat to get some flow into my ski pass. Sounds great but the trunk rattles alot.
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      11-25-2010, 01:01 AM   #7
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Trunk rattles like crazy

I recently added subs and a bandpass box and the trunk rattles like a mother. I managed to pinpoint some of the vibrations and deaden them but it still sounds like s#& from the outside! The locations i found ranged from the rear bumper to the gas cap door all the way to the front license plate! From in the cockpit however it sounds like a concert.
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Last edited by Lacrypta; 11-25-2010 at 01:52 AM.
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      11-25-2010, 01:45 AM   #8
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I have 2 15's and honestly, my car doesnt rattle much at all.


Your setup is awesome..........Those subs are MASSIVE. I wish my back seats came down too.
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      11-25-2010, 03:53 AM   #9
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I may have my system ( box ) up for sale soon.
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      11-25-2010, 07:07 AM   #10
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Quote:
Originally Posted by Lacrypta View Post
I recently added subs and a bandpass box and the trunk rattles like a mother. I managed to pinpoint some of the vibrations and deaden them but it still sounds like s#& from the outside! The locations i found ranged from the rear bumper to the gas cap door all the way to the front license plate! From in the cockpit however it sounds like a concert.
I would expect nothing else from a bandpass box. If you want clean, tight bass with minimal rattles, go sealed. If you want output, go ported. If you just want to shake the car apart, go bandpass.
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