15's with low FS wanted!

Big_Bill · 3rd August 2009, 05:31 AM

Anybody have any used 15" woofers (8 Ohms) with an FS in the teens or low 20's?

P.S. Still hunting an Audax tmo25f1 tweeter if anyone has any!

Moondog55 · 3rd August 2009, 07:51 AM

You want a matching pair don't you Bill??

Second hand Dayton Classic 15 ?? and add mass until Fs drops to desired frequency, put up with the drop in SPL & the sag can be fixed by rotating every year or two

Big_Bill · 3rd August 2009, 02:48 PM

Quote:

Originally posted by Moondog55
You want a matching pair don't you Bill??

Second hand Dayton Classic 15 ?? and add mass until Fs drops to desired frequency, put up with the drop in SPL & the sag can be fixed by rotating every year or two

Are ther any articles/posts that anyone knows of I should read relating to adding mass properly?

AndrewT · 3rd August 2009, 03:17 PM

Hi,
as you add mass the Q rises.
If the Q is already medium, say 0.3 to 0.4 then it will probably rise too high for a vented enclosure. A sealed enclosure already has a raised resonant frequency that has little dependency on Fs so you have little to gain.

In addition the efficiency/sensitivity falls with added mass.

http://www.diyaudio.com/forums/showt...041#post701041

http://speakerworkshop.com/SW/Projec...***%20Test.htm

http://techtalk.parts-express.com/sh....php?p=1582426

http://www.mlssa.com/pdf/MLSSA-SPO-Brochure.pdf

http://sound.westhost.com/tsp.htm

http://www.bcae1.com/speaker.htm

google found these links.

klm1 · 3rd August 2009, 08:24 PM

check w/ ApexJr, see site http://www.apexjr.com

klm1 · 3rd August 2009, 09:51 PM

check Vendor's Bazaar; his subwoofer's are tremendous value.

(Hey Steve, Have a Great Vacation!!!)

nate · 4th August 2009, 04:36 AM

if you are interested in a single, I have an Adire Tempest which is a 15" woofer with a low fs. This driver is as new and has not been run in yet.

Send me an email if interested.

nate

Big_Bill · 4th August 2009, 05:16 PM

Quote:

Originally posted by nate
if you are interested in a single, I have an Adire Tempest which is a 15" woofer with a low fs. This driver is as new and has not been run in yet.

Send me an email if interested.

nate

I dont see an email link on your post?

tinitus · 4th August 2009, 10:51 PM

Click on "nate"
you will find his mail in his personal profile

AndrewT · 5th August 2009, 10:51 AM

click on Nate and send as many Emails as you want.
It will always come back telling us that he has disabled his Email.

3rd August 2009, 05:31 AM	#1
Big_Bill diyAudio Member Join Date: May 2009	15's with low FS wanted! Anybody have any used 15" woofers (8 Ohms) with an FS in the teens or low 20's? P.S. Still hunting an Audax tmo25f1 tweeter if anyone has any!

3rd August 2009, 07:51 AM	#2
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	You want a matching pair don't you Bill?? Second hand Dayton Classic 15 ?? and add mass until Fs drops to desired frequency, put up with the drop in SPL & the sag can be fixed by rotating every year or two __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

3rd August 2009, 03:17 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, as you add mass the Q rises. If the Q is already medium, say 0.3 to 0.4 then it will probably rise too high for a vented enclosure. A sealed enclosure already has a raised resonant frequency that has little dependency on Fs so you have little to gain. In addition the efficiency/sensitivity falls with added mass. http://www.diyaudio.com/forums/showt...041#post701041 http://speakerworkshop.com/SW/Projec...***%20Test.htm http://techtalk.parts-express.com/sh....php?p=1582426 http://www.mlssa.com/pdf/MLSSA-SPO-Brochure.pdf http://sound.westhost.com/tsp.htm http://www.bcae1.com/speaker.htm google found these links. __________________ regards Andrew T.

3rd August 2009, 08:24 PM	#5
klm1 diyAudio Member Join Date: Oct 2004 Location: Highland, MI	listen to the man... check w/ ApexJr, see site http://www.apexjr.com __________________ some like it hot;"the biggest mistakes are made by those who make assumptions!" Graham Maynard

3rd August 2009, 09:51 PM	#6
klm1 diyAudio Member Join Date: Oct 2004 Location: Highland, MI	also...(sorry Steve) check Vendor's Bazaar; his subwoofer's are tremendous value. (Hey Steve, Have a Great Vacation!!!) __________________ some like it hot;"the biggest mistakes are made by those who make assumptions!" Graham Maynard


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4th August 2009, 04:36 AM	#7
nate diyAudio Member Join Date: Jun 2004 Location: USA	if you are interested in a single, I have an Adire Tempest which is a 15" woofer with a low fs. This driver is as new and has not been run in yet. Send me an email if interested. nate

4th August 2009, 10:51 PM	#9
tinitus diyAudio Moderator Join Date: Nov 2005	Click on "nate" you will find his mail in his personal profile

5th August 2009, 10:51 AM	#10
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	click on Nate and send as many Emails as you want. It will always come back telling us that he has disabled his Email. __________________ regards Andrew T.

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