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Old 07-07-2003, 02:41 AM   #1
SterlingSilver
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Talking Finished my first-ever sub box today...

I'm taking my car into a local car audio place in the next week or so to get everything installed. I got a quote from them for $250 just to build the box. That was just for a plain box too, nothing custom. I wanted something a little more for a little less, so I decided to kill some free time and build my own.

This is the first box I've ever built, but I think it came out pretty nice.

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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
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Old 07-07-2003, 02:42 AM   #2
SterlingSilver
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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
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Old 07-07-2003, 02:44 AM   #3
SterlingSilver
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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
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Old 07-07-2003, 02:45 AM   #4
SterlingSilver
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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
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Old 07-07-2003, 10:21 AM   #5
ken330i
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it looks nice! i luv the look of that sub.
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Old 07-07-2003, 02:19 PM   #6
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gj

i'm about to build my 2nd box too.

i hate carpeting it though. that's gets messy sometimes
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Old 07-07-2003, 02:45 PM   #7
learthworml
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nice. looks good for your first box. that is a huge magnet.
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Old 07-07-2003, 03:46 PM   #8
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That preety good for your first box, but lets hope it holds together because that sub hits hard.
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Old 07-07-2003, 04:43 PM   #9
SterlingSilver
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Quote:
Originally posted by Havocz28
That preety good for your first box, but lets hope it holds together because that sub hits hard.
Thanks.

I know the W7 hits hard, so I tried to make it as tight and secure as possible. Every joint has lots of liquid nails and severeal 2-1/2" screws. If it doesn't hold together, I'll be surprised.

Just have to wait til it all gets hooked up to find out if my box survives!
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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
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Old 07-07-2003, 06:29 PM   #10
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nice job i am about to start my first ever box this week, although i ma making mine a little bit more custom fitting then that i hope mine will look as finsihed and clean as yours does
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Old 07-07-2003, 06:40 PM   #11
djabaley
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Sexy box. I made a box for my old car and it was an ultra PITA. It looks like yours is construted pretty well, and lots of glue is never a bad thing. Great DIY and you'll get better as time goes on
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Old 07-07-2003, 06:41 PM   #12
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u should have wiped away those excessive liquid nails inside the box :o
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Old 07-07-2003, 11:33 PM   #13
SterlingSilver
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Quote:
Originally posted by boynix
u should have wiped away those excessive liquid nails inside the box :o
Yeah, I know. I didn't think there would be QUITE that much excess, and I couldn't see it since I had the acrylic taped up for painting at the time. Oh well, it still looks okay. It's more noticeable in the pics for some reason.

Looking back now, I still think it came out pretty da mn good for a first attempt, but if I ever do another, I'll know better what to do and not do.
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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
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Old 07-08-2003, 12:10 AM   #14
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pretty nice...good job
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Old 07-08-2003, 11:58 AM   #15
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Being that the box is a "sealed" type of enclosure, I'm wondering why you didn't put any polyfill in there? It seems you want the cosmetic look to be nice, but my priority if always "sound first" and looks second.

The sound of a sealed box has always been nicer to my ears and I've always liked the sound of "filled" boxes as opposed to empty ones.

Just curious.
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Old 07-08-2003, 12:27 PM   #16
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people usually use polyfill to reduce the volume of the box when they can't physically change the box...
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Old 07-08-2003, 02:35 PM   #17
djabaley
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Yes, polyfill is not a sound-quality increasing agent, and it can effectively reduce the quantity of air inside of a sealed box. Polyfill is in no way necessary to build a quality, nice sound sealed box. I've had three sealed boxes so far, and if they are built to proper specs the need for polyfill is negated. Just plopping polyfill inside of a sealed box will not give the box magical SQL qualities.
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Old 07-08-2003, 06:32 PM   #18
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Quote:
Originally posted by boynix
people usually use polyfill to reduce the volume of the box when they can't physically change the box...
Polyfill makes the box behave like a larger box.

tm
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Old 07-08-2003, 10:43 PM   #19
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You guys have it backwards except for tm, adding fill to a box effectively "increases" what the driver "sees" in size.

Fill is most definately an enhancement as it helps the driver. My experience is that the sound is a bit "tighter" and the cone appears better damped when a sealed box has fil in it.

It doesn't take long to check for yourself whether or not you want the fill or not. You can buy polyfil in a crafts store for about $3-4 for 16oz, which is MORE than enough for a 10" or 12" box. It's easy to put in and remove.

TT
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Old 07-08-2003, 11:19 PM   #20
djabaley
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You're talking about loose polyfill. I was talking about the application of epoxy-impregnated polyfill to reduce air volume. Yes, loose polyfill is supposed to make the box seem larger to the drivers when the physical size of the box is too small as to eliminate strange things with resonance and other acoustic magic. A properly designed sealed box will not require the use of polyfill. In this case I think it'd be an even worse idea, because went to the trouble of putting in a plexi window, and there's no reason to mess up his asthetics.

Search:
http://www.caraudioforum.com

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.
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