T/S for old subs

Doug · 30th October 2003, 11:09 AM

I have some older Cerwin Vega subwoofers, approx mid 80's and was wondering if anyone would hav the Thiele / Small for them.

Thanks

Doug · 30th October 2003, 11:14 AM

Whoops I forgot to give the model number. They are ATW15's and also on the magnet is C5V.

Thanks

Ron E · 1st November 2003, 02:06 PM

You will have to measure them yourself. It is tedious, but easy to do. One article on how to do it:
http://www.epanorama.net/documents/a...arameters.html

You use your soundcard equipped computer with an audio generator program (NCHtone makes a good free one) and a voltmeter and a couple resistors.

or you can go whole hog and use a free measurement system, called Speaker Workshop (google it).

I have some AT-12's from that era and they measure Fs=20, Qts=0.16 and Vas=360L...

About all I could say about the 15s is that you should expect low Q and High Vas - that's how they get the high sensitivity.

30th October 2003, 11:09 AM	#1
Doug diyAudio Member Join Date: Dec 2002 Location: Guelph, Ontario, Canada	T/S for old subs I have some older Cerwin Vega subwoofers, approx mid 80's and was wondering if anyone would hav the Thiele / Small for them. Thanks

30th October 2003, 11:14 AM	#2
Doug diyAudio Member Join Date: Dec 2002 Location: Guelph, Ontario, Canada	CV subs Whoops I forgot to give the model number. They are ATW15's and also on the magnet is C5V. Thanks

1st November 2003, 02:06 PM	#3
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	You will have to measure them yourself. It is tedious, but easy to do. One article on how to do it: http://www.epanorama.net/documents/a...arameters.html You use your soundcard equipped computer with an audio generator program (NCHtone makes a good free one) and a voltmeter and a couple resistors. or you can go whole hog and use a free measurement system, called Speaker Workshop (google it). I have some AT-12's from that era and they measure Fs=20, Qts=0.16 and Vas=360L... About all I could say about the 15s is that you should expect low Q and High Vas - that's how they get the high sensitivity. __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. —Aldous Huxley

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