Is there a TQWP design for the FR125SR? - diyAudio
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Old 1st July 2008, 07:19 PM   #1
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Default Is there a TQWP design for the FR125SR?

As I sit here, I'm listening to my first pair of homemade speakers. They are the old Weems pipes with 40-1354s, and I love them dearly. I'm wanting to make something similar with better drivers, and the FR125SR look really interesting. Has anyone modeled them in a TQWP? Or built some? The spec sheet on the CSS website mentions a bunch of designs, but I couldn't find any of them.
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Old 1st July 2008, 07:24 PM   #2
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One of the best implementations I have heard is the Calhoun from Scottmoose and planet10. It's a big box but an easy build. The side mounting of the second driver is a big plus. It's about halfway down the page.

You can see it here on Dave's site:

http://www.frugal-horn.com/spawn-plans.html
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Old 1st July 2008, 08:07 PM   #3
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There's also a Bi-pole TQWP for these on the Planet 10 page but they are pretty big also. looks kinda cool though.

Here's the link
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Old 1st July 2008, 10:03 PM   #4
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Default Re: Is there a TQWP design for the FR125SR?

FWIW I made an adapter to mount the original version of this driver into some existing 40-1354 MLTLs with excellent results, though I did finally tune them a bit lower to take advantage of its prodigious Xmax, so I imagine you can get similar results from your existing Weems pipe with possibly only some stuffing adjustment.

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Old 2nd July 2008, 01:39 AM   #5
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I want to make an entirely new speaker. I was considering using Bob Brines' version of the ML TQWT for the 40-1354. Would this be a good starting point? It seems his version is much more refined than the Weems pipe.
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Old 2nd July 2008, 02:51 AM   #6
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It appears to be a bit too large, but damping will take care of that if required and of course you'll need some BSC if well away from any boundaries.

Note that this driver has no rising rate suspension to protect it against bottoming like the 1354 does, though I found my pair to be very robust with no audible problems after numerous 'clanks' playing PF's DSOTM and Jimmy Smith's 'ROUND MIDNIGHT at levels loud enough to bring the apartment neighbors over to be amazed at how loud/clear these small drivers play.

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Old 2nd July 2008, 08:31 AM   #7
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Quote:
Originally posted by gurley123
There's also a Bi-pole TQWP for these on the Planet 10 page but they are pretty big also. looks kinda cool though.

Here's the link
Just halve the cross-section. Fold it to make it shorter....

Cal's boxes are the best i've heard with this driver.

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Old 5th July 2008, 07:01 AM   #8
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Quote:
Originally posted by planet10


Cal's boxes are the best i've heard with this driver.

dave

Which boxes are those?
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Old 5th July 2008, 07:02 AM   #9
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post #2

http://www.diyaudio.com/forums/showt...48#post1552148
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Old 5th July 2008, 07:53 AM   #10
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Quote:
Originally posted by Cal Weldon
post #2

D'oh!

Thanks!
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