Random 12" woofer in 100 liter cabinet - diyAudio
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Old 20th December 2006, 12:07 AM   #1
Klimon is offline Klimon  Belgium
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Location: Leuven
Default Random 12" woofer in 100 liter cabinet

I'm aware of the invention of TS parameters and advanced simulation software.... but:

What can I expect from a 12" woofer (removed from Marantz 7g imperial speakers) in a 100 liter (=25 gallons) closed cabinet? Any rough guesses about low-end response and flatness of FR in f3-100hz region? I read that the original cabs were BR tuned at 80hz with about 60 liter (15gallons) internal volume. With some stuffing I could probably reach about 130l with my cabinets.

I have the 100l cabs lying around so it would be easy if they match up well with the 12" marantz drivers....

Would be nice to get a (rough) idea what to expect, there's still some work to do on the cabinets.

Thanks!!

Simon
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Old 20th December 2006, 12:58 AM   #2
hifiger is offline hifiger  Canada
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The xmax and the fs of the driver would help.

here is a quick response plot i made with unibox for a 12 inch driver with 10mm of xmax, fs of 30hz, Re 4ohm svc, Le 1.3mh, with 100watts in a 100L, heavily stuffed enclosure:

http://img219.imageshack.us/img219/5...esponsekx6.gif
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Old 20th December 2006, 11:06 AM   #3
Klimon is offline Klimon  Belgium
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Thanks, that gives a rough idea. I would have thought a woofer that size in a cabinet that size would be about flat untill 40hz.... We'll see how it goes.

Simon
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Old 20th December 2006, 02:51 PM   #4
sreten is offline sreten  United Kingdom
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Hi,

Drivers designed to work in 60L reflexed are not going to work in 100L
sealed. Its a 12" so 100L doesn't sound too far off but I think you will
have to reflex it, I'd say at 35 Hz to 45Hz.

/sreten.
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Old 20th December 2006, 04:16 PM   #5
tinitus is offline tinitus  Europe
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I guess you will get more like -12db at 40hz, if you are lucky, and that could very well be the same with BR

They might be designed to be placed in corners or against the wall
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