what box size for 12 sub?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=116604
Printed Date: May 01, 2024 at 8:06 PM
Topic: what box size for 12 sub?
Posted By: kaztheminotaur
Subject: what box size for 12 sub?
Date Posted: September 29, 2009 at 8:26 AM
Is there a list anywhere that gives ideal box volume for 12" and 10" subwoofers? I have a 99 Silverado extended cab and I'd like to make a box to go under the rear seat on the driver's side. Thanks, Tom
Replies:
Posted By: kaztheminotaur
Date Posted: September 29, 2009 at 8:52 AM
Using the Wedge 2 volume calculator I have .939 cubic feet internal volume available.
Posted By: blackcivichatch
Date Posted: September 29, 2009 at 9:08 AM
Exactly what subs are you using?
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UNLABELED Custom Car Club President
Posted By: kaztheminotaur
Date Posted: September 29, 2009 at 9:11 AM
I haven't gotten that far yet. Do different subs prefer different volumes?
Posted By: blackcivichatch
Date Posted: September 29, 2009 at 9:19 AM
Oh yea. Rockford Fosgate makes a shallow mount sub and it looks like it wants 1.00 cubic feet in a sealed enclousure or 1.25 in a ported box. Kicker's shallow mount also wants 1.00 cu ft in a sealed but 1.75 in a ported.
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UNLABELED Custom Car Club President
Posted By: kaztheminotaur
Date Posted: September 29, 2009 at 9:41 AM
So is it safe to assume that most 12" subs will want 1 cubic feet volume? Since I am a little small can I make up the rest with poly fill in the box?
Posted By: blackcivichatch
Date Posted: September 29, 2009 at 9:49 AM
Haha., Its never 'safe' to assume anything with car audio. Polly fill will add 10-15% of the volume. You should be ok.. Just look up all the specs for the sub BEFORE you buy it and make sure that it will be ok in a 1.00 cubic foot sealed box
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UNLABELED Custom Car Club President
Posted By: kaztheminotaur
Date Posted: September 29, 2009 at 10:33 AM
I measured again and I can increase my depth 2 inches to 17. If I figure poly fill adding 15% to the volume that brings it up tio 1.24 cubic feet.
Posted By: blackcivichatch
Date Posted: September 29, 2009 at 11:40 AM
Dont forget that the sub isn't flush with the rest of the box.
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UNLABELED Custom Car Club President
Posted By: h3_assassin
Date Posted: September 29, 2009 at 11:43 AM
kaztheminotaur wrote:
Is there a list anywhere that gives ideal box volume for 12" and 10" subwoofers?
I have a 99 Silverado extended cab and I'd like to make a box to go under the rear seat on the driver's side.
Thanks, Tom
Your best bet would be to remove all things under the seat (that don't belong there)
See how much room you have, measure it up and throw that in to a box volume calculator. this is the one i used for my boxthat will give you the length width depth and height and factor in material displacement.
Simplify that,
measure your space, go to that site plug in the numbers and see what you get, if your trying for 1.00 cubic feet and end up with anything under .8xx poly fill wont save you for sealed. I recommend making a box that will stick out slightly in front and behind the seat, ever so slightly so no one will be tempted to use it as a foot stand.
After you've measured everything up tweak it with that tool to find out how close you can get and measure it up again with those numbers to make certain it will fit in the space. "I made my box as close to 2.5Cubic feet as possible but didn't remeasure my trunk space and was about half an inch to high....."
Measure twice, hate yourself once.
Posted By: h3_assassin
Date Posted: September 29, 2009 at 11:44 AM
kaztheminotaur wrote:
So is it safe to assume that most 12" subs will want 1 cubic feet volume?
Since I am a little small can I make up the rest with poly fill in the box?
No i have a 12 inch subwoofer and it calls for over one cubic foot of volume, although it is a high performance MBquart woofer...
Posted By: blackcivichatch
Date Posted: September 29, 2009 at 8:12 PM
h3_assassin wrote:
kaztheminotaur wrote:
Is there a list anywhere that gives ideal box volume for 12" and 10" subwoofers?
I have a 99 Silverado extended cab and I'd like to make a box to go under the rear seat on the driver's side.
Thanks, Tom
"I made my box as close to 2.5Cubic feet as possible but didn't remeasure my trunk space and was about half an inch to high....."
Measure twice, hate yourself once.
Been there... Hate that...  ------------- UNLABELED Custom Car Club President
Posted By: aznboi3644
Date Posted: September 29, 2009 at 8:46 PM
every sub is different.
If you build a 1 cu ft sealed enclosure than find a sub that will perform well in sealed enclosures.
There is NO ONE SIZE FITS ALL
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Custom Enclosure Design
Posted By: blackcivichatch
Date Posted: September 30, 2009 at 12:00 AM
aznboi3644 wrote:
every sub is different.
If you build a 1 cu ft sealed enclosure than find a sub that will perform well in sealed enclosures.
There is NO ONE SIZE FITS ALL
Not jus a sealed enclosure, but a 1 cu ft enclosure ------------- UNLABELED Custom Car Club President
Posted By: aznboi3644
Date Posted: September 30, 2009 at 1:26 PM
blackcivichatch wrote:
aznboi3644 wrote:
every sub is different.
If you build a 1 cu ft sealed enclosure than find a sub that will perform well in sealed enclosures.
There is NO ONE SIZE FITS ALL
Not jus a sealed enclosure, but a 1 cu ft enclosure
1 cu ft + a 12" subwoofer...sealed is the only option you have.
1 cu ft is barely enough for a ported 10" sub. Shove a 12 in there and expect dog ass sound ------------- Custom Enclosure Design
Posted By: h3_assassin
Date Posted: October 12, 2009 at 11:26 AM
aznboi3644 wrote:
blackcivichatch wrote:
aznboi3644 wrote:
every sub is different.
If you build a 1 cu ft sealed enclosure than find a sub that will perform well in sealed enclosures.
There is NO ONE SIZE FITS ALL
Not jus a sealed enclosure, but a 1 cu ft enclosure
1 cu ft + a 12" subwoofer...sealed is the only option you have.
1 cu ft is barely enough for a ported 10" sub. Shove a 12 in there and expect dog ass sound
I did some digging with our suppliers *I'm from a site Stompaudio.com * I'm here to help you guys not spam so don't freak out.
As i said I was doing some digging and came up with, Pioneer Low end subwoofers are capable of performing under low CF levels, down to 1CF.
Personal experience tells me the Fosgate P1 is great for 1CF as this was my first system years ago. As well as experience they are actually made for small air tight enclosures with less Cubic Volume than other subwoofers might need to produce the same sound level.
Posted By: aznboi3644
Date Posted: October 13, 2009 at 8:13 PM
1 cu ft is not enough for a ported enclosure for pretty much 99 percent of 12 inch subwoofers
Only ones I know are the TC Sounds drivers.
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Custom Enclosure Design
Posted By: h3_assassin
Date Posted: October 15, 2009 at 11:51 AM
aznboi3644 wrote:
1 cu ft is not enough for a ported enclosure for pretty much 99 percent of 12 inch subwoofers
Only ones I know are the TC Sounds drivers.
Agreed unless they are shallow mount and specify.
Your sound will be garbage and it will probably damage the woofer body.
you Might be able to make up for the lack of an AIR cushion by making a smaller port but tuning is going to be near impossible.
Posted By: aznboi3644
Date Posted: October 15, 2009 at 5:01 PM
A subwoofers mounting depth has nothing to do with its enclosure size.
Shallow mount subwoofers can require even larger enclosures than normal subwoofers
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Custom Enclosure Design
Posted By: babydaddy
Date Posted: October 17, 2010 at 6:49 PM
you can google custom sub boxes for your truck.
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KyleRozema
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