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Mid Bass cabs.


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#21 lifter

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Posted 18 March 2014 - 06:21 PM

Well, I decided to go with the horn load..

http://www.ebay.com/...&_qi=RTM1562569

I need to pick a driver..

Im thinking of the B&C 15

http://www.prosounds...ium-woofer.html

Advice/suggestions??



#22 djk

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Posted 18 March 2014 - 06:43 PM

Don't bother, the mass corner on that driver is only 300hz.

The horn in the JBL4560/Altec A7 only starts really working above about 200hz, and the best driver available is the JBL 2220 series, useable to 500hz in those designs.



#23 djk

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Posted 18 March 2014 - 06:52 PM

The 4560/A7 boxes are not well suited to modern needs, they are too big for what they can do.

4560.jpg

Best use of 4560/A7 type cabinets (EV TL5050's on the bottom).

mids_12.jpg

Redesign for a 12 and take a chainsaw to the un-needed parts of the 4560/A7 and this is what it looks like (horn is the same size as the horn portion of the 4560/A7).

dual12MantaRay.jpg

Redesign for a pair of 12's, better sounding but bigger (horn is same size as the horn portion of the JBL 4550/Altec A4)


Edited by djk, 18 March 2014 - 06:54 PM.


#24 djk

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Posted 18 March 2014 - 07:02 PM

The 4550/A4 was really too big (48"W x 34.5"H), so I redesigned it to work better.

MilesAdamsBand3.jpg

Terrible photo of new dual 12 mid horn, 30"W x 40"H.

CoePA-2009.jpg

Old PA with stacked single 12 type 4560/A7 sized horns.

I have plans for the new dual 12 mid horn, a pretty easy build. They require either a JBL 2202, EV 12L, or B&C 12PE32 to work the best.

Image16.jpg

Looks great, but can't touch the newer designs.


Edited by djk, 18 March 2014 - 07:08 PM.


#25 lifter

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Posted 18 March 2014 - 07:39 PM

Interesting..



#26 djk

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Posted 18 March 2014 - 09:26 PM

A Quad V12 semi-horn mid cabinet, good to 800hz or so. A 15" version would also be possible, good to 600hz or so.

These can be in the range of 106dB~107dB/2.83V/1M down to 100hz to so.

Tonyquad12box_zpsa60f231c.jpg

.

info2_zps25ca26ac.jpg

.


Edited by djk, 18 March 2014 - 09:32 PM.


#27 lifter

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Posted 18 March 2014 - 09:52 PM

You make these?? Good work..



#28 djk

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Posted 19 March 2014 - 01:30 AM

Another project from SpeakerPlans.com

The Tannoy VQ60 is similar.

http://www.tannoy.co...heet_201144.pdf


Edited by djk, 19 March 2014 - 01:33 AM.