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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > DIY: Under seats sub upgrade



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      10-12-2007, 10:54 AM   #155
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Yep, the shop did it... I checked before approving the job

& The enclosure is filled with dynamat
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      10-15-2007, 04:57 AM   #156
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Quote:
Originally Posted by etik View Post
& The enclosure is filled with dynamat

how much dynamat did you use? Do we need 2 12 sq. ft. sheets to work for both subs enclosures?
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      10-15-2007, 05:06 AM   #157
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http://cgi.ebay.com/DYNAMAT-XTREME-S...QQcmdZViewItem

will this work?
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      10-15-2007, 12:20 PM   #158
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Quote:
Originally Posted by LaYzEe View Post
That's the one I have used exactly.
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      11-12-2007, 02:21 PM   #159
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so is there one under each seat or only passenger
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      11-12-2007, 04:04 PM   #160
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I have a question, can you put in the SWS subs in under the seats and just use the stock amp?
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      11-12-2007, 05:21 PM   #161
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Quote:
Originally Posted by semaanaudio View Post
so is there one under each seat or only passenger
One sub under each seat

Quote:
Originally Posted by down4it View Post
I have a question, can you put in the SWS subs in under the seats and just use the stock amp?
I would not try that, subwoofer are demanding in terms of RMS power. The oem amplifier will not do.
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      11-12-2007, 06:21 PM   #162
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Quote:
Originally Posted by down4it View Post
I have a question, can you put in the SWS subs in under the seats and just use the stock amp?
Actually, you could... but why?

The whole idea of replacing the OEM subs is to feed them real power, power that it is not being fed by the OEM amp...
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      11-14-2007, 01:16 AM   #163
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Originally Posted by etik View Post
I'm in a bad mood today... car just back for BMW dealer for USB retrofit... they installed a 'classic' ipod interface... they gonna redo the job but I've to wait for 3weeks to my new appointment...
Were you able to get this resolved?
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      11-14-2007, 05:00 PM   #164
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hi, I am doing the same upgrading to the subs. I replaced all speakers with Audio-System speaker set, including the subwoofers. They are the special set made dedicated for E9x by Audio-System. The subs have the similar construction as the earthquake SWS-8. I get an excellent acoustic results but bass, so I added a 2-channel 2x100 watt aftermarkt amp just to enhence the bass. But the result doesn't change too much beside more bass, since my amp is connected to the sub-output of the oem amp. I think the sub channel of the oem amp is really bad, and I need also the frequence below 50 hz, which is definitively not available by the oem amp output. Now I ordered a line driver (thanks to a forum member for the usefull info) to pull out signal from the head unit directly, and try to connect my amp to the line driver. I am waiting for the shipment from USA.

One thing I didn't feel well: one time I forgot to turn down the amp sensitivity as the input signal came, the subs were so loud and distorted as if my car have had begun to explode. I am afraid the speaker membrane might be damaged by hitting the sub-cover under the seat. I don't want to remove the seat to see them. Did anyone ever see the subs go that far above if over boosted?

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      11-14-2007, 08:24 PM   #165
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Originally Posted by jonywalker View Post
hi, I am doing the same upgrading to the subs. I replaced all speakers with Audio-System speaker set, including the subwoofers. They are the special set made dedicated for E9x by Audio-System. The subs have the similar construction as the earthquake SWS-8.
...
jonywalker
do you have any information on the Audio-System speaker set like a web link or something?
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      11-15-2007, 05:33 AM   #166
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Quote:
Originally Posted by akhter View Post
Were you able to get this resolved?
NO They were confused and the USB retrofit does not work with by head unit. So I've the classic ipod interface for now.

Not that good, many issues as reported many times on this forums.
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      11-15-2007, 05:36 AM   #167
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Quote:
Originally Posted by akhter View Post
do you have any information on the Audio-System speaker set like a web link or something?
hier is the link
The set is not available on the page yet, it is brand new, may be I am the first one having it installed. With this system we don't need to make any modification, evey thing goes perfectly on the position. Just wait till I get the line driver then I can tell how about the bass result.

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      11-15-2007, 07:36 AM   #168
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Quote:
Originally Posted by etik View Post
NO They were confused and the USB retrofit does not work with by head unit. So I've the classic ipod interface for now.

Not that good, many issues as reported many times on this forums.
tell me about it. i have it and it sux. i think i am gonna switch to the aux connection
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      11-15-2007, 07:37 AM   #169
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Quote:
Originally Posted by jonywalker View Post
hier is the link
The set is not available on the page yet, it is brand new, may be I am the first one having it installed. With this system we don't need to make any modification, evey thing goes perfectly on the position. Just wait till I get the line driver then I can tell how about the bass result.

jonywalker
how much is the set?
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      11-15-2007, 05:18 PM   #170
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Quote:
Originally Posted by akhter View Post
how much is the set?
500,- euro.
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      11-16-2007, 03:57 PM   #171
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Quote:
Originally Posted by etik View Post
I'm in a bad mood today... car just back for BMW dealer for USB retrofit... they installed a 'classic' ipod interface... they gonna redo the job but I've to wait for 3weeks to my new appointment...
Also you can use Dension interface:

http://www.dension.com/icelinkgateway500.php

Cool interface, I think...
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      12-12-2007, 09:02 PM   #172
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The Earthquake's specs are as follows:
300w Peak power
150w RMS Power
Impedance: 4 Ohms


The Pioneer's specs are as follows:
500 watts Peak
120 watts RMS
4 Ohms Subwoofer

What type of amp should I get to power a pair of these subs and how should I wire them? Any preference on brand?
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      12-16-2007, 09:21 PM   #173
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Any thoughts?
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      12-16-2007, 09:32 PM   #174
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Quote:
Originally Posted by Gixxer335iCoupe View Post
The Earthquake's specs are as follows:
300w Peak power
150w RMS Power
Impedance: 4 Ohms


The Pioneer's specs are as follows:
500 watts Peak
120 watts RMS
4 Ohms Subwoofer

What type of amp should I get to power a pair of these subs and how should I wire them? Any preference on brand?
The SWS-8 are a drop in for the OEM enclosure; the Pioneer's are not, so the decision should be easy. I have both in my GTI and I think that the SWS-8 sounds better than the Pioneer's under the same conditions anyway...

An Alpine MRP-M450 could be perfect for those SWS-8: plenty of power in a parallel (2 ohms) configuration (200W RMS to each SWS-8) and small footprint.

Last edited by Technic; 05-18-2008 at 09:35 AM..
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      05-18-2008, 09:08 AM   #175
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i posted this in another thread http://www.e90post.com/forums/showthread.php?t=87130 and also here just in case i dont get the answers from over there...

i just ordered the earthquake sws-8 to replace the oem and alpine mpr m550, do i need LVT2 and STINGER SLOCII? seems like cardomain.com doesnt carry those items anymore, anyone knows where to get them if my set up needs it, ty
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      05-27-2008, 03:02 PM   #176
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does the sws8 fit in the 6.5inch enclosure ?
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