Random 12" woofer in 100 liter cabinet

Klimon · 19th December 2006, 11:07 PM

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

hifiger · 19th December 2006, 11:58 PM

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

Klimon · 20th December 2006, 10:06 AM

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

sreten · 20th December 2006, 01:51 PM

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.

tinitus · 20th December 2006, 03:16 PM

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

19th December 2006, 11:07 PM	#1
Klimon diyAudio Member Join Date: Apr 2005 Location: Leuven	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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19th December 2006, 11:58 PM	#2
hifiger diyAudio Member Join Date: Aug 2006	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

20th December 2006, 10:06 AM	#3
Klimon diyAudio Member Join Date: Apr 2005 Location: Leuven	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

20th December 2006, 01:51 PM	#4
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	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.

20th December 2006, 03:16 PM	#5
tinitus diyAudio Moderator Join Date: Nov 2005	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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