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Old 18th February 2003, 08:05 PM   #1
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Location: NZ
Question help with front loaded horn designs -please

Hi There, I have four cerwin-vega 800watt (rms) subs that Im wanting to build up enclosures for, im wanting to build up folded horn enclosures for these,. Ive only managed to find one design on the internet and its designed for 15" drivers. can somebody please take a look at the below URL and see if you think these dimensions would also be suitable for use with 12" drivers also, or possibly recommend a design suitable for the 12's.

ive done alot of box design before but never folded horn so im really stuck here any help would be greatly apprichatited.


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Old 18th February 2003, 09:41 PM   #2
Bull is offline Bull  United Kingdom
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I don't know many horn loaded designs that use 12 inch drivers,except those for upper midrange.
has two 12 inch front horn designs,one a mid/top box with horn loaded 12 inch mids and compression tweeters,and the other design is a horn loaded midrange only cabinet.

I've got an amazing book by Eminence called;

'high power loudspeaker enclosure design and construction'

published by Adam Hall ISBN 0-9518252-1-6

This book covers every different type of enclosure in great detail[but using Eminence drivers]

But as your using Cerwin Vega drivers another good book is;

'Loudspeakers for Musicians' by Vivian Capel
ISBN 0-85934-242-5

If you can't get hold of either of these books,also try and if this doesn't help you try posting a message on and

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Old 18th February 2003, 10:52 PM   #3
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Default ch

thanks for your reply, ive seen quite a few books and sites around the place as well, but none deal with 12" designs,. I would build some 15" or 18" horns up except I already have four brand new 12's left over from another project, and dont really need the power of 4 x 15's as its just for around the home, we use an EV setup when out and about DJing.

thanks again for your reply.
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Old 19th February 2003, 06:52 AM   #4
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Location: Switzerland
I remember two bass-bins by EV that were using 2x12". One was called the "Jumbo Bass box" and the other one was called "Sentry". Maybe you can find plans on these ones.
Unfortunately I don't remember the model number of the Sentry one which is important since this name was also used for some HiFi speakers and studio monitors by EV.


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Old 14th November 2004, 11:31 PM   #5
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If you found plan for the SENTRY IV...please let me know!!
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File Type: jpg sentry samll.jpg (24.5 KB, 524 views)
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Old 15th November 2004, 02:48 AM   #6
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Location: Indiana
Default Bass Horn

The LAB horn is driven by a pair of custom 12" drivers built by Eminence. The plans are posted in the Live Audio Board's archive under "subwoofer project".

If you can get the TS parameters for your drivers, you could use Horn Response to come up with a suitable design using a single 12", though this might take some time to get familiar with the program.

Just to give you an idea, here a CV design for a 15". The rear chamber would have to be re- sized for the 12", and the throat to mouth ratio redone, but it is probaby similar to what you would end up with.

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Old 15th November 2004, 07:45 AM   #7
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Sorry. That sub in the drawing takes an 18" woofer.
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Old 15th November 2004, 09:23 AM   #8
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Could also have a look at designs by Bill Fitzmaurice at - I haven't built any of his stuff myself, but designs appear quite good and others have reported good results.

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Old 15th November 2004, 09:02 PM   #9
Join Date: May 2004
Location: New Hampshire
Depending on driver specs my Tuba 30 may work for you. It's infinetely easier to build than Lab, a bit smaller too.
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