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Old 16th September 2010, 12:19 AM   #1
mhd204 is offline mhd204  United States
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Join Date: Jan 2008
Location: Brookline, MA
Default I just designed a ML-TQWT for Tang Band W5-1880

So this is my first post on DiyAudio after probably a year of lurking and learning as much as I can. I started out in the Pass Labs forum, and I will be building an F5 amp, and thought I should research some full range speakers for it. So I bought a license for Martin Kings excellent 1/4 wave mathcad sheets, and read all his articles, and came up with this design. It is a ML-TQWT tuned to approx. 40 Hz for use with the TB-W5-1880 driver. I think this enclosure could be good for many different 4-5" drivers but I have not modeled any other than the TB.

Here is a 3D Cad image:
Imageshack - speakerw.jpg

Here is the CAD details:
Imageshack - w51880mltqwt.jpg

And here is the FR on infinite baffle:
Imageshack - w51880mltqwtfr.jpg

After a BSC circuit this may not be the most efficient design, but it will definitely go deep. The Xmax chart matches that of a sealed box, but with better handling around the box tuning area. Also, the first 2/3 of the line have .25 lb/ft^3 of stuffing. Please critique!
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Old 15th October 2010, 02:07 AM   #2
mp9 is offline mp9  United States
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So, how did they work out?
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Old 15th October 2010, 02:58 PM   #3
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Default W5-1880 box

Interesting design, how deep is the enclosure?
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Old 17th October 2010, 07:51 AM   #4
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Location: Holland
These might also work quite well with the Markaudio Alpair 10 drivers as they are quite similar in specs. Would you be able to do a simulation with those drivers?

Larryldspkr: From the cad drawing you can see the enclosure is 12 inches deep, what i can't figure out is the exact height the driver is placed at.

Last edited by nlRenderman; 17th October 2010 at 08:15 AM. Reason: addition
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Old 17th October 2010, 08:20 AM   #5
rt68 is offline rt68  France
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re driver position: the drawing suggests that the baffle is square.
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Old 17th October 2010, 05:39 PM   #6
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Your right rt68, based on that assumption the driver's center would be about 4.2 inches from the top.
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