12" Sub Box Plans

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   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

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

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ZeroT Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 28 March 2011 Status: Offline Points: 4	Post Options Post Reply Quote ZeroT Report Post Thanks(0) Quote Reply Topic: 12" Sub Box Plans 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 Can you recommend a design and wheather I should make a single box for both drivers or 2 boxes.

Tony Wilkes Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 02 August 2004 Location: West Midlands Status: Offline Points: 4835	Post Options Post Reply Quote Tony Wilkes Report Post Thanks(0) Quote Reply Posted: 28 March 2011 at 5:23pm
	The PDF has a recommended box for each driver why not use that? Tony
	www.forteaudio.eu - BMS - db-Mark Processors - Lexon (SAE)

ZeroT Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 28 March 2011 Status: Offline Points: 4	Post Options Post Reply Quote ZeroT Report Post Thanks(0) Quote Reply 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.

_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 5992	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply Posted: 29 March 2011 at 12:19am
	The only way those will be acceptable will be in a front loaded horn. Edited by _djk_ - 29 March 2011 at 12:05pm
	djk

ZeroT Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 28 March 2011 Status: Offline Points: 4	Post Options Post Reply Quote ZeroT Report Post Thanks(0) Quote Reply 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

Centauri Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 29 November 2004 Location: Newcastle Aus Status: Offline Points: 1792	Post Options Post Reply Quote Centauri Report Post Thanks(0) Quote Reply Posted: 29 March 2011 at 11:14am
	I suppose Bill does - as well as anyone else who has paid for them .....

ZeroT Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 28 March 2011 Status: Offline Points: 4	Post Options Post Reply Quote ZeroT Report Post Thanks(0) Quote Reply 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.

Mautopsy Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 February 2011 Location: Michigan Status: Offline Points: 61	Post Options Post Reply Quote Mautopsy Report Post Thanks(0) Quote Reply Posted: 29 March 2011 at 3:17pm
	dont use a car speaker, sell them and buy drivers specified for the design you want.

_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 5992	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply 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).
	djk

_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 5992	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply 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.
	djk