Submitted for your approval, Isobaric cab. - diyAudio
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Old 10th March 2013, 10:47 PM   #1
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Default Submitted for your approval, Isobaric cab.

I was recently given 8 - 10" Bugera drivers with aluminum cones. Rated @ 240 watts each. I've never tried an Isobaric cabinet before. Designed and built lots of P.A. speakers and all have worked very well. Thought I'd put this design up and see if there were any opinions. 3/4" ply with 4-2" vents 18" long and insulation dampening. Some details left off plan for clarity.
Thank you for your consideration!
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Old 14th March 2013, 09:08 PM   #2
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I am moving this over here. Hopefully you'll get a better response.
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Old 14th March 2013, 09:30 PM   #3
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Quote:
Originally Posted by Smeneice View Post
I was recently given 8 - 10" Bugera drivers with aluminum cones. Rated @ 240 watts each. I've never tried an Isobaric cabinet before. Designed and built lots of P.A. speakers and all have worked very well. Thought I'd put this design up and see if there were any opinions. 3/4" ply with 4-2" vents 18" long and insulation dampening. Some details left off plan for clarity.
Thank you for your consideration!
If the drivers are not back vented, or the vents do not make noise, I would suggest mounting the drivers cone to cone, reversing the polarity of the drivers with the magnets out.
Simplifies construction, reduces even order harmonic distortion, and the reduced enclosed area makes the output sound "tighter".
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Old 14th March 2013, 09:33 PM   #4
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Can't find any pdf for datasheets?
Is it a subwoofer, I don't see any advantage of using it isobaric if it isn't?
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Old 15th March 2013, 03:10 AM   #5
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Thanks for relocating this Cal. There seems to be immidiate intrest.
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Old 15th March 2013, 03:22 AM   #6
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There are 4 - 2"dia 18" long ports starting in the rear chamber and running through the faceplate.
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Old 15th March 2013, 03:27 AM   #7
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No PDF's I'm just not that advanced. I'm not really building it for a specific use. It's more of an experiment to see what an isobaric cabinet is all about.
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Old 15th March 2013, 03:56 AM   #8
NEO Dan is offline NEO Dan  United States
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You must ask what do you gain by going isobaric?
You are effectively wasting 4 drivers worth of acoustic output IMO.
What is the intended use, bass cab, PA sub, home sub?
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Old 15th March 2013, 04:40 AM   #9
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Precicely. That's what I want to know. What do I gain from going isobaric. A friend told me about them. Then I got the free drivers and I'm always building something. Usaully bass bins. I could always use any of those types of bin. Bass cab or sub. Just experimenting really. Have got lots of power to try with them. Just thought I'd put the design out here first to get some feed back from people such as yourself. )
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Old 15th March 2013, 04:00 PM   #10
Zero D is offline Zero D  United Kingdom
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@ Smeneice

Quote:
What do I gain from going isobaric.
Half the volume required of the box.
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