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[raj]

Hi Rory B ,
Can your design be altered for a 12" driver as there is more choice in this size , you could increase the width upto 20" or so ?? Will you work on that ?

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[raj]

Keep it up , I will be looking forward for your super crusher too
cheers

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[michiel]

raj wrote on Tue, 15 February 2005 14:50

Walt , Are you thinking of designing another version of the punisher which will be 40hz and also more driver friendly ? Rory B , I think that problem is not there in the autotuba as the driver is only 100w , also many have tested it  and found it satisfactory .

I designed a single 12"/double 8" horn for hifi use wich i think can be tuned for PA use. The hifi version geos down to 30 Hz (i have build the horn with double 8" configuration.
With some tweaking i think i can get more output and a botom around 40 Hz. The horn was originaly designed for the LAB12. It looks like the punisher, same folding.

And, i have been working on a double 10" 40 Hz horn for PA use. Here you can find the first drawing: http://groups.msn.com/_Secure/0SgD9Aj4Wkzwizp0amyMa!XUghqY9g O17UHA!qZbf5w2k1Ygmc192zzglm8PwFffZznGZEx9BHOCqJQOgvc*PCxirn GuixkezbNMOXMvpDEnIpJoEjys9PA/schets%2002.JPG?dc=46755098774 07877118

I only have a simulation of a single box on the net: http://groups.msn.com/_Secure/0UwA0A!kXdcJ1depvoeenaRB0qpJke P!oDwksNfMH4uo0fpz8NzzlcZWlX32YpHzbXe1rwhmljL29Y*xHaxRjjuAuH 1!5kCfnszH619V8MP17SewI4Ggy1va7tOyXzoMf/HLA%20BR%20vs%20HORN .JPG?dc=4675511920502531104

I designed this cab to use in a stack of 4. The dip won't be there if you use 4 cabs. the f3 of a stack of 4 is around 40 Hz. In the simulation the drivers can take up to 1000 watt each without reaching the xmax.
Max spl @ 1000 watt per driver (8000 total) in a stack of 4 is 144 dB @ one meter.
Dimensions are almost simular to the Mach Ballister, wich i think is a nice format.

Both designs are not the final designs, they need a bit of tuning before the preformance is optimal. If you are intrested i'm willing to work something out. You can contact me via email.  

[raj]

The curves 0f the 2x10" look interesting , we could call it younger brother of the lab sub ,

[michiel]

I have optimised the design and the curve looks a little different, a sligthly rising respone from 40 Hz to 100 Hz in a stack of 4.
The design is ready for some testen in the field. To bad i don't have money the build a proto type and do some tests. If somebody  want to invest in this project yopu can mail me for information. If not, i maybe build a proto type if i have some money to spend in the future.

And yes, it looks like the LAB. I wanted to use the same folding wich i think is the best compromise for this kind of sub.

[raj]

what about your other horn with 2x8'drivers or a single 12'driver , please also mention the outer dimentions of this , have you tested this or this too is yet to be tested ,

Yes your 2x10" looks like a younger brother of the Lab sub , It is a very good project for those who want 40hz and smaller size than the Lab sub .