Tapped horn for Tang band W69-1042M - Page 2 - diyAudio
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Old 17th July 2012, 06:12 PM   #11
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Thanks for the help folks. Bjorno, my sim for the tapped horn was almost identical to yours, and when max SPL is looked at it is still xmax limited in the 40-60Hz range. Is this just me overlooking something or is there really something I should be overlooking?

The OD T-TQWT looks interesting but I'm kind of perplexed as to where the driver would mount in regards to the mouth. I also like that there will be no delay required from the DCX2496 in regards to the OD T-TQWT. Would this be the same sort of external mount of the driver as a TQWT or would this be mounted internally like a TH?

I'd like to keep it smaller if at all possible and the 1.5 cubic/ft is much smaller than the TH at nearly 3.25cubes.
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Old 17th July 2012, 06:59 PM   #12
zobsky is offline zobsky  India
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About 3 - 4 years back, I built a prototype T_TQWT for W69-1042J. Was worth it, and I would have rebuilt it nicely had I needed another sub at the time. In fact, that's why I still have my pair of W69 drivers around. Not sure if I posted the plans of diyaudio or not, but from memory, it was a single fold design with the driver close to the start of the pipe
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Old 18th July 2012, 05:06 AM   #13
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How would I go about folding the OD T-TQWT that bjorno posted? I assume similar to a TH but I just want to be sure.
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Old 23rd July 2012, 06:24 AM   #14
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No one? I would like to try this OD T TQWT but am confused regarding the fold and the pipe end opening(mouth). Any help would be appreciated.
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Old 24th July 2012, 02:12 AM   #15
zobsky is offline zobsky  India
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Quote:
Originally Posted by speakrsrfun View Post
No one? I would like to try this OD T TQWT but am confused regarding the fold and the pipe end opening(mouth). Any help would be appreciated.
Here's a very rough drawing . Extend the sections as needed
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File Type: jpg fr_186_size400.jpg (44.9 KB, 159 views)
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Old 24th July 2012, 05:23 PM   #16
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Thanks Zobsky, clears things up a bit.

Quick ? ... How important is the width of the enclosure? Also what effect will the wider cabinet have on frequency responce? I understand that with horns the wider the mouth the greater the extension, but is this attribute also true with a OD T-TQWT?
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Old 24th July 2012, 06:23 PM   #17
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Quote:
Originally Posted by speakrsrfun View Post
Thanks Zobsky, clears things up a bit.

Quick ? ... How important is the width of the enclosure? Also what effect will the wider cabinet have on frequency responce? I understand that with horns the wider the mouth the greater the extension, but is this attribute also true with a OD T-TQWT?
Hi

The width have no effect or very little effect and can be ignored as a T-TQWT is a point pressure source i.e. omni.

A T-TQWT is not a TH = no mouth but a (TL) terminus= port like a BR have.

Normally, to ensure adequate magnet clearance depth behind the driver the enclosure internal dept is maximized by choosing the driver frame width as the internal width(+0 .1 inch or so).

b
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Old 24th July 2012, 09:24 PM   #18
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Thanks for clearing that up bjorno, as this driver is quite narrow I was hoping the frequency responce wouldn't suffer due to this attribute. So essentially the line end or S3 would determain the size of said port opening if you will. And the terminus is centrally aligned with the back wave of the driver... correct me if I understand this wrong.
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Old 24th July 2012, 11:15 PM   #19
zobsky is offline zobsky  India
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Quote:
Originally Posted by speakrsrfun View Post
Thanks Zobsky, clears things up a bit.

Quick ? ... How important is the width of the enclosure? Also what effect will the wider cabinet have on frequency responce? I understand that with horns the wider the mouth the greater the extension, but is this attribute also true with a OD T-TQWT?
Like Bjorno said, the narrower the cabinet the better (easier to get the driver basket+magnet to fit) > here's one I built a few years ago for a 12" driver Opinions needed on Tapped Horn drivers
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Old 11th August 2012, 07:53 AM   #20
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I'm having issues understanding how to fold this thing.... Here is what I've come up with but somehow I think I should be able to fold it much more efficiently like zobsky's 12" cabinet. Any help in the right direction would be appreciated.

Click the image to open in full size.
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