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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > FULL SWS-8 sub and amp install, 34 pictures, step by step



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  FULL SWS-8 sub and amp install, 34 pictures, step by step
azwillnj
08-14-2008
I gathered a ton of information from this site about how to upgrade the stock subwoofers and amplifier. From this information I have created a full, step by step tutorial that will guide you through the entire process. It is 27 pages long and has 34 pictures included....

Check out...
  #44  
By wrh3 on 08-27-2008, 06:10 PM
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Nice job man, Thanks
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  #45  
By cassey on 08-27-2008, 10:34 PM
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Great write-up! I just have a question about your remote wire connection. Does your amplifier only turn on with your engine running?
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  #46  
By azwillnj on 09-03-2008, 12:15 AM
No, well, kinda.. It turns on with a second push of the start button, so acc power on. If there was a regular turn key it would be the second click....

To put it another way.. when I turn the car off and want to have the amp on without the engine I have to try to start the car without the clutch depressed.
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  #47  
By d_dot on 09-03-2008, 08:41 AM
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can ne1 modify this for the e92 m3 coupe???
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  #48  
By d_dot on 09-10-2008, 08:07 AM
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Does it have to be that amp that was listed i the install or can it be any amp like the one i am currently using?????????
Last edited by d_dot; 09-11-2008 at 06:00 AM.
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  #49  
By cassey on 09-11-2008, 02:03 AM
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Quote:
Originally Posted by azwillnj View Post
No, well, kinda.. It turns on with a second push of the start button, so acc power on. If there was a regular turn key it would be the second click....

To put it another way.. when I turn the car off and want to have the amp on without the engine I have to try to start the car without the clutch depressed.
Thanks! I was wondering how it would work using the cigarette lighter remote wire connection. Seems like it works fine for most scenarios. I used a low voltage trigger and my amp stays on whenever the radio is on. I also noticed that the amp stays on for about a minute after I lock the car.
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  #50  
By d_dot on 09-11-2008, 06:00 AM
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Quote:
Originally Posted by d_dot View Post
can ne1 modify this for the e92 m3 coupe???
Quote:
Originally Posted by d_dot View Post
Does it have to be that amp that was listed i the install or can it be any amp like the one i am currently using?????????
+2
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  #51  
By Speedtrap on 10-03-2008, 03:20 PM
Thanks a heap dude
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  #52  
By aus on 10-04-2008, 03:34 AM
Awesome job.
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  #53  
By d_dot on 10-04-2008, 07:27 AM
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Has ne 1 done this on the coupe preferably the m3 e92 coupe?
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  #54  
By Technic on 10-04-2008, 09:16 AM
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Quote:
Originally Posted by d_dot View Post
Has ne 1 done this on the coupe preferably the m3 e92 coupe?
It is done in the E92 M3 standard sound system the same way as this DIY.
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  #55  
By d_dot on 10-04-2008, 09:35 AM
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Quote:
Originally Posted by Technic View Post
It is done in the E92 M3 standard sound system the same way as this DIY.
So what is different for the coupe with premium sound
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  #56  
By Technic on 10-04-2008, 01:13 PM
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Quote:
Originally Posted by d_dot View Post
So what is different for the coupe with premium sound
Should be nothing, as the underseat enclosure is the same regardless of the type of sound system.
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  #57  
By Technic on 10-04-2008, 02:16 PM
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This is the enclosure and woofer of the Premium sound...



It is an approximately 7 ohm woofer:



To make sure that I'm measuring this correctly, this is a Pioneer 8" 4 ohms shallow sub for comparison:



Thus, a SWS-8 can be installed in a Premium Sound-equipped M3 underseat enclosure exactly the same as in this DIY. In theory, a pair of 4 ohms SWS-8 could be powered by the Premium Sound OEM amp with an inmediate 75% power increase just because of the reduction of the impedance, however the OEM amp not necessarily will be stable at that load.

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  #58  
By azwillnj on 03-31-2009, 11:30 PM
Just wanted to let you guys know that I have kinda stopped monitoring this thread so if you have any questions the best way to get in touch with me is to PM me. I have it setup so that PM's get forwarded to my Blackberry so I can respond quickly.

Alex.
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  #59  
By arhim22 on 02-17-2010, 10:58 AM
is the new amp necessary? or could I just replace the subs?
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  #60  
By jeremynpross on 03-18-2010, 04:13 AM
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Kudos from a Legend

I just installed the Earthquakes with these spacers at Rick Reus' Orange, CA shop. Everything went really well. Rick said I can quote him:

"Tell those guys they did an amazing job making the fabricated spacers and instructions"

Means a lot coming from a legend!

Take a bow, jtsherri and azwillNJ

(BTW Earthquake themselves refer installers to azwillNJ's instructions if they call the company with questions)

I have a Reus Systems stereo in my 335 and proudly show it off at SoCal events to help Reus sales efforts. For those of you who don't know him -- the best hidden secret in car audio -- Rick Reus engineers arguably the sweetest sounding high-end systems in the world for BMWs and other high-end cars. He has an amazing reputation stretetching back to the 1970s.

PM me for more info. Check out Reus at http://www.reusaudio.com/aboutus.html
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  #61  
By IancoleTX on 03-29-2010, 12:56 PM
This write up made my life super easy, thanks a million bro
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  #62  
By mvvinod2k on 04-26-2010, 01:25 AM
Excellent write up. Thanks for all your efforts !!!
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  #63  
By x3oiler on 09-30-2010, 10:05 AM
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I crunched the PDF in acrobat . tis 3.3MByte now and can be attached to the OP if required.

Great post and detail. Much appreciated.
Attached Images
File Type: pdf BMW e90 Sub and Amp Upgrade - PDF s.pdf (3.15 MB, 255 views)
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  #64  
By h2oskier on 10-30-2010, 02:00 PM
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Quote:
Originally Posted by Technic View Post



Thus, a SWS-8 can be installed in a Premium Sound-equipped M3 underseat enclosure exactly the same as in this DIY. In theory, a pair of 4 ohms SWS-8 could be powered by the Premium Sound OEM amp with an inmediate 75% power increase just because of the reduction of the impedance, however the OEM amp not necessarily will be stable at that load.

Has anyone tried this? I have a 07 335i with Logic 7. Would love to just replace the subs.
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  #65  
By azwillnj on 10-31-2010, 10:37 AM
I did the install in stages, I installed the subs first then the amp a few days later. With just the subs and no amp there was a significant improvement over stock. And I didn't have any problems. But I only ran like that for like 3 days, so I'm not sure what the long term effects would be.

Alex.
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