Other plans - 12" Sub Box Plans

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12" Sub Box Plans

Printed From: Speakerplans.com
Category: Plans
Forum Name: Other plans
Forum Description: Discussion / Questions about all the other plans
URL: https://forum.speakerplans.com/forum_posts.asp?TID=50401
Printed Date: 26 March 2026 at 11:31pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com

Topic: 12" Sub Box Plans

Posted By: ZeroT
Subject: 12" Sub Box Plans
Date Posted: 28 March 2011 at 5:20pm

I have been reading the site with great interest and I am now planning to build a box/boxes for 2x12" subwoofers.

The box(s) will be used in a relativly enclosed space inside a 12m x 6m marquee to around 50 people, the marquee will be sealed with the sides down.

I already have a pair of JL car audio subwoofers laying around in the garage so I plan to use these, all the specs can be found here http://mobile.jlaudio.com/pdfs/8-12W6_BDS.pdf - http://mobile.jlaudio.com/pdfs/8-12W6_BDS.pdf

Can you recommend a design and wheather I should make a single box for both drivers or 2 boxes.

Replies:

Posted By: Tony Wilkes
Date Posted: 28 March 2011 at 5:23pm

The PDF has a recommended box for each driver why not use that?

Tony

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www.forteaudio.eu - BMS - db-Mark Processors - Lexon (SAE)

Posted By: ZeroT
Date Posted: 28 March 2011 at 6:22pm

Sorry, this should have gone in the plan requests section too.

The standard 4 sided box designs work well in the boot of a car but dont seem to work all that well outside of such an enclosed space.

I didnt know if a 'non car design' might work better after seeing all the various designs on here.

Posted By: _djk_
Date Posted: 29 March 2011 at 12:19am

The only way those will be acceptable will be in a front loaded horn.

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djk

Posted By: ZeroT
Date Posted: 29 March 2011 at 10:38am

what about the Tuba 30? Does anyone have the plans for them?

http://www.billfitzmaurice.com/T30.html - http://www.billfitzmaurice.com/T30.html

Posted By: Centauri
Date Posted: 29 March 2011 at 11:14am

I suppose Bill does - as well as anyone else who has paid for them .....

Posted By: ZeroT
Date Posted: 29 March 2011 at 12:23pm

sorry i meant if anyone has the plans do they know if it will work for the spec of my subs.

Posted By: Mautopsy
Date Posted: 29 March 2011 at 3:17pm

dont use a car speaker, sell them and buy drivers specified for the design you want.

Posted By: _djk_
Date Posted: 30 March 2011 at 4:49am

I can do a design for you in Hornresp, give you the throat area, chamber volume, length, and mouth area. You can look at other designs to figure out the build details.

For reference, look at a Punisher (search).

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djk

Posted By: _djk_
Date Posted: 04 April 2011 at 12:28pm

JL 12W6 parallel coils.

2Pi 2.83V
300cm throat 5000cm mouth 250cm length
18L rear chamber 1L front chamber
433L net volume

105dB/2.83V/1M average level, -5dB at 40hz, needs a 3dB cut at 110hz, ±2dB 44hz~110hz (with 3dB cut at 110hz), 40V RMS (400W/4Ω) displacement limited maximum, 128dB at 45hz, 4Ω average impedance.

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djk