E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Bavarian Soundwerks' Mobile Electronics Forum

Bavarian Soundwerks' Mobile Electronics Forum
Have all your A/V and electronics questions answered here. Ipods, A/V, Radar Detectors Oh My!
Sponsored by Bavarian Soundwerks

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 07-09-2003, 01:26 PM   #21
NH328DJ
Registered User
 
Join Date: Feb 2003
Location: NYC and NH
Posts: 817
My Ride: 1987 E30
Send a message via AIM to NH328DJ
well done, looks good
__________________


-Brendan
NH328DJ is offline   Reply With Quote
Old 07-09-2003, 03:11 PM   #22
SilverGrey330
BMW: Best Thing on 4 Wheels
 
Join Date: Apr 2003
Location: Arlington, Va
Posts: 441
My Ride: 03SilverGrey330i SP
Send a message via AIM to SilverGrey330
ok so i have got just one question, and this my just be me being really dumb and missing somethign, but if you look at the back of the sub you will notice there are walls all the way around it, that are sealed with liquid nail and what not. Now it appreas to me that the space that is contained by thoes walls and the piece of plexi is prety small. SO my quesiton is, is there even enough air in that box to fulfill the subs minium requirements.

I really hope i am wrong on this one cus i love that box and i hope it will still work as good as it looks(especially for a first time)
__________________
SilverGrey330 is offline   Reply With Quote
Old 07-09-2003, 10:00 PM   #23
SterlingSilver
Bimmerlover
 
Join Date: Jun 2002
Location: KC
Posts: 298
My Ride: 2004 325Ci
Don't worry, the box is pretty close to EXACTLY what is required. The box is supposed to be 1.25 (2160 inches) cubic feet net volume (2160 inches) , 1.34 cubic feet gross volume (2315 inches).

The INTERIOR dimensions for my box are a width of 16.25 inches, a height of 12.5 inches, a bottom of 14.25 inches deep, and a top of 8.5 inches deep.

So, the volume is equal to (1/2 * 5.75 * 12.5 * 16.25) + (8.5 * 12.5 * 16.25) = 584 + 1728 = 2312 gross inches.

So, technically my box is a TINY bit too small, but I can't see that hurting things. What's three inches going to hurt? I have hooked it up to check it out, and it sounds awesome.
__________________


Ti Silver 2004 325Ci - 5-speed - SP - CWP - Adaptive Bi-Xenons - Power Moonroof
Mods - M3 Lip Spoiler - Hard-wired V1 - 35% Tint all around - More To Come...
ICE - Alpine CDA-9807 MP3/CD/Receiver - Focal 136 k Front Stage - Focal 130 ca Rear Fill - JL Audio 10w7 Sub - JL Audio 300/4 System Amp - JL Audio 500/1 Sub Amp - Pac SWI-X
SterlingSilver is offline   Reply With Quote
Old 07-09-2003, 10:58 PM   #24
SST
Registered User
 
Join Date: Oct 2002
Location: Chicago, IL
Posts: 2,190
My Ride: 325i
For answers about polyfill. Mixed reactions and lack of proof one way or the other make me hesistant to adopt the addition of free polyfill as a viable means by which to change sound dynamics.
************

If you check into actual writing on the topic you'll find that there is "proof" on the subject actually. It's not one of those things that people do and pass off as "belief".

As the gentleman has stated himself, his box may be a bit small in demension thus polyfill can help extend the bass lower with some fill.

Epoxy impregnated? No, just polyfill, simple everyday polyfil which doesn't reduce box "size".

TT
SST is offline   Reply With Quote
Old 07-09-2003, 11:09 PM   #25
SilverGrey330
BMW: Best Thing on 4 Wheels
 
Join Date: Apr 2003
Location: Arlington, Va
Posts: 441
My Ride: 03SilverGrey330i SP
Send a message via AIM to SilverGrey330
i think the box as a whole looks big wnough but it seems liek there is a box with in the box that sourounds the back of the acutaull woofer and has the plexi as one of the smaller walls, but hey you built it so if you say so man i totally belive you

Enjoy the set up
__________________
SilverGrey330 is offline   Reply With Quote
Old 07-10-2003, 04:33 PM   #26
SterlingSilver
Bimmerlover
 
Join Date: Jun 2002
Location: KC
Posts: 298
My Ride: 2004 325Ci
Quote:
Originally posted by SilverGrey330
i think the box as a whole looks big wnough but it seems liek there is a box with in the box that sourounds the back of the acutaull woofer and has the plexi as one of the smaller walls, but hey you built it so if you say so man i totally belive you

Enjoy the set up
OK, I see what you might be seeing. Here's how I did the back... it is kind of a box within a box. I wanted to use plexi so I could see the W7, but I also wanted to make sure the back is strong enough that the W7 won't blow it out over time.

The back is essentially a 3-layer sandwich. The first layer is a 1 ft. square, 1/2" thick piece of plexi glass TIGHTLY framed inside a 1/2" thick piece of MDF.

Then there is a piece of 3/4" thick MDF with a 9" square hole cut out in the center. The first layer is bonded to that. with liquid nails. The plexi glass is bonded to both pieces with clear silicone caulk and several 1" screws.

Finally, there is another layer exactly like the first one with a sheet of plexi glass in it, also bonded with liquid nails.

So, the back piece has a total thickness of 1 3/4". In the center, for the viewing panel, there is 1/2" of plexi glass, 3/4" of air, and another 1/2" of plexi glass. The whole piece is very strongly bonded and tightly sealed. The ruggedness of the piece was just to ensure that the W7 wouldn't in any way damage the back panel. The whole box was designed with this in mind, and I assure you the total volume is within 3 inches of what the specs call for.

Here's a couple of pictures of the back panel assembly to help show what I'm talking about.

Oh, and I didn't use any poly fill because to me, with this setup, I'd prefer to possibly sacrifice a LITTLE sound quality for the asthetics I was looking for.
Attached Thumbnails
Click image for larger version

Name:	im002339.jpg
Views:	82
Size:	88.5 KB
ID:	60342  
__________________


Ti Silver 2004 325Ci - 5-speed - SP - CWP - Adaptive Bi-Xenons - Power Moonroof
Mods - M3 Lip Spoiler - Hard-wired V1 - 35% Tint all around - More To Come...
ICE - Alpine CDA-9807 MP3/CD/Receiver - Focal 136 k Front Stage - Focal 130 ca Rear Fill - JL Audio 10w7 Sub - JL Audio 300/4 System Amp - JL Audio 500/1 Sub Amp - Pac SWI-X
SterlingSilver is offline   Reply With Quote
Old 07-10-2003, 04:35 PM   #27
SterlingSilver
Bimmerlover
 
Join Date: Jun 2002
Location: KC
Posts: 298
My Ride: 2004 325Ci
another
Attached Thumbnails
Click image for larger version

Name:	im002342.jpg
Views:	72
Size:	54.6 KB
ID:	60343  
__________________


Ti Silver 2004 325Ci - 5-speed - SP - CWP - Adaptive Bi-Xenons - Power Moonroof
Mods - M3 Lip Spoiler - Hard-wired V1 - 35% Tint all around - More To Come...
ICE - Alpine CDA-9807 MP3/CD/Receiver - Focal 136 k Front Stage - Focal 130 ca Rear Fill - JL Audio 10w7 Sub - JL Audio 300/4 System Amp - JL Audio 500/1 Sub Amp - Pac SWI-X
SterlingSilver is offline   Reply With Quote
Old 07-10-2003, 04:37 PM   #28
SterlingSilver
Bimmerlover
 
Join Date: Jun 2002
Location: KC
Posts: 298
My Ride: 2004 325Ci
last one
Attached Thumbnails
Click image for larger version

Name:	im002345.jpg
Views:	87
Size:	65.8 KB
ID:	60344  
__________________


Ti Silver 2004 325Ci - 5-speed - SP - CWP - Adaptive Bi-Xenons - Power Moonroof
Mods - M3 Lip Spoiler - Hard-wired V1 - 35% Tint all around - More To Come...
ICE - Alpine CDA-9807 MP3/CD/Receiver - Focal 136 k Front Stage - Focal 130 ca Rear Fill - JL Audio 10w7 Sub - JL Audio 300/4 System Amp - JL Audio 500/1 Sub Amp - Pac SWI-X
SterlingSilver is offline   Reply With Quote
Old 07-14-2003, 05:29 PM   #29
Delirium
yo mama
 
Join Date: May 2002
Location: O.C.
Posts: 1,622
My Ride: -
did you take the displacement of the sub into consideration when measuring the cuft3?
Delirium is offline   Reply With Quote
Old 07-14-2003, 05:47 PM   #30
djabaley
does anyone read my p0sts?
 
Join Date: May 2002
Location: Florida
Posts: 595
My Ride: 325 slushbox
The displacement of the sub is usually something laughable like .05 cubic feet. It's listed in spec sheets.
__________________
djabaley is offline   Reply With Quote
Old 07-14-2003, 09:28 PM   #31
SterlingSilver
Bimmerlover
 
Join Date: Jun 2002
Location: KC
Posts: 298
My Ride: 2004 325Ci
Yes, I did take the sub's displacement into account. That's why I mentioned the GROSS volume of the box. The sub itself displaces .09 Cubic feet.

The box requires 1.25 Cubic Feet net of the sub. Adding the .09 Cubic feet that the sub displaces brings it up to a gross requiremenrt of 1.34 Cubic Feet My box is almost exactly 1.34 Cubic feet.
__________________


Ti Silver 2004 325Ci - 5-speed - SP - CWP - Adaptive Bi-Xenons - Power Moonroof
Mods - M3 Lip Spoiler - Hard-wired V1 - 35% Tint all around - More To Come...
ICE - Alpine CDA-9807 MP3/CD/Receiver - Focal 136 k Front Stage - Focal 130 ca Rear Fill - JL Audio 10w7 Sub - JL Audio 300/4 System Amp - JL Audio 500/1 Sub Amp - Pac SWI-X
SterlingSilver is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 10:26 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use