Madisound RB in a BIB? - diyAudio
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Old 30th January 2009, 03:55 PM   #1
mikje is offline mikje  United States
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Default Madisound RB in a BIB?

I was looking at Madisound's Recession Buster kit and wondered if it would work in a BIB?

http://www.madisound.com/catalog/pro...oducts_id=8525

It looks to me like a box that is 8.5X11.5X64.1 (inches) and a 26.5 inch z would work. I got these numbers using Zilla's calculator.

I'm not sure where the tweeter would mount, but it could be moved around for optimum positioning based on the listener's on axis position. I have no idea how to go about figuring BSC on this one, though.

Any ideas, good, bad, or indifferent???

Thanks,
Mike
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Old 30th January 2009, 11:00 PM   #2
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Very interesting! A TL floor stander would be nice also.
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Old 31st January 2009, 02:36 AM   #3
GM is offline GM  United States
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That sure looks like a deal! WRT the BIB, I recommend going ahead and using T.C.'s original design height which changes the dims to:

height (in) 69.006
depth (in) 9.838
width (in) 6.957
A-B-C (in) 4.919
driver offset (in) 29.949
driver offset - sub (in) 59.898
driver height (in) 39.808
driver height - sub (in) 9.859

L (in) 138.013
Sm (in^2) 68.445
net Vb (ft^3) 2.73329

baffle thickness (in) 0.750
zdriver 0.217
zdriver - sub 0.434
Fs 48.78
Vas (ft^3) 0.3708
Qts 0.45
SoS (in/sec) 13464.54

All dims approximate and damp to suit. If you back it up against a wall it probably won't need any BSC.

Anyway, if you build BIBs, please post the actual size chosen, your thoughts on its performance, etc. and link to it on the huge BIB thread.

Assuming no test gear, hook up the tweeter and move it around the perimeter of the woofer's circumference till it's loudest on average at the highest frequencies across the 'sweet spot'.

GM
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Old 24th February 2009, 12:44 AM   #4
qingcai is offline qingcai  United States
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hi gm,
I am totally a newbie, can you draw a diagram for ur design?

thanks.
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Old 24th February 2009, 02:52 AM   #5
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http://www.zillaaudio.com/bib-calculator.htm

Maybe this will help you figure the box:

http://www.zillaspeak.com/bib-howtobuild.asp

This could be a great BIB project without using a full range driver. Good luck!

Godzilla
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Old 24th February 2009, 09:51 AM   #6
qingcai is offline qingcai  United States
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thanks Godzilla for educated me. thanks for the links
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Old 4th March 2009, 05:04 PM   #7
mikje is offline mikje  United States
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I ordered my RBs today. I'll post some pics and such when I get them built.
Any other ideas about a good project for the RBs?
Thanks,
Mike
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Old 3rd April 2009, 09:30 PM   #8
qingcai is offline qingcai  United States
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I did not find anything yet.
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Old 9th August 2009, 08:03 PM   #9
mightym is offline mightym  United States
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Did these ever get built?

Would like to know which size, calculator , or GM recommended?

Thinking of trying this out myself.
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Old 9th August 2009, 08:07 PM   #10
mikje is offline mikje  United States
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I ended up going with the typical recommended cabinet for now. Having the room for them is a little bit of an issue until I get "the man-cave" done. Putting the RBs in a BIB is another of those projects that's "on the list."
Mike
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