Peavey Black Widow 18" PA subwoofer design - diyAudio
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Old 9th January 2012, 03:21 PM   #1
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Default Peavey Black Widow 18" PA subwoofer design

Hi all,
I recently found in my basement a 18", 8 ohms Peavey Black Widow loudspeakers, and I would like to build up a subwoofer to complete my dj setup. Do someone have some suggestion about the cabinet to build? I'd like to promote power handling, since I will use it for some dj sets.
Here are the specs of the Black Widow:
http://www.peavey.com/assets/literat...s/80300801.pdf

This sub will work with two Peecker Sound 4012MH loudspeakers (http://www.peeckersound.com/en/Forty/4012MH-4012MH-A).

Thank you all!
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Old 9th January 2012, 03:41 PM   #2
GloBug is offline GloBug  Canada
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Well you have the spec sheet so it should help you design a box.

Just be sure the woofer is good, I had a 12" widow that is on my list of all-time worst reliable speaker. It had many temporary failures, something to do with the ribbons going to the voice coil.

I finally gave up and built the amp into a new cabinet with 2 x 12" Celestions.

I'm not saying yours is bad, just give it a good once over before designing a custom cabinet for an 18" woofer, unless you can replace the woofer with another 18" from a different brand.
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Old 9th January 2012, 06:22 PM   #3
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That driver is used in a 9 cubic foot cab tuned to 42Hz. The port is 14"W x 3"H x 3/4"L. http://www.peavey.com/media/pdf/manuals/118subhc.pdf The replacement basket PN is 1801-8 LT RB and costs about USD $100.00 online.
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Old 9th January 2012, 08:29 PM   #4
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Thanks very much for your answers! The woofer is in a very good condition, I am testing it right now as a dipole and it seems working well. I will try it with this suggested box.
Thanks again!
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Old 9th January 2012, 09:38 PM   #5
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Forgot to add that if the vented pole pieces have the foam filter, remove it. The foam will deteriorate with age and get sucked into the voice coil gap. http://forums.peavey.com - BW Foam Goo in Pole Piece Click the image to open in full size.
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Old 9th January 2012, 10:09 PM   #6
GloBug is offline GloBug  Canada
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Maybe that happened to me.
I should add I had a 15", not a 12".
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Old 10th January 2012, 01:05 AM   #7
mdocod is offline mdocod  United States
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do you have the 4 or 8 ohm version? The T/S parameters are quite a bit different between the 2. .
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Old 10th January 2012, 02:22 AM   #8
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Quote:
Originally Posted by mdocod View Post
do you have the 4 or 8 ohm version? The T/S parameters are quite a bit different between the 2. .
Quote:
Originally Posted by alberto82 View Post
Hi all,
I recently found in my basement a 18", 8 ohms Peavey Black Widow loudspeakers,..

Last edited by ltdf; 10th January 2012 at 02:44 AM.
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Old 10th January 2012, 12:13 PM   #9
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I have the 8ohm version. I don't know if the foam is still there... I will check!
One last question: is this loudspeaker suitable for a bandpass design? I prefer to have the loudspeaker inside the enclosure, to avoid damages.

Thanks!
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Old 11th January 2012, 11:10 AM   #10
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IIRC the .61 QTS may be too high for a 6th order BP. Whatever cab you design, note that the replacement basket has different T/S parameters. I would suggest modeling both.

http://www.peavey.com/assets/literat...6629_13615.pdf

The 1801-8 and the newer 1801-8 LT (Long Throw), as well as the 4 ohm 1801-4 and 1801-4 LT, are compatible with the 9 ft BR cab in the post #3 above.
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