unfolded pipe design for fe127e - diyAudio
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Old 7th February 2008, 01:16 AM   #1
kvk is offline kvk  United States
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Default unfolded pipe design for fe127e

So I'm still looking at all these plans trying to decide what to build. I still am considering the Fonken Floorstander and the Meliva but I also think taper pipes are so cool looking and look very easy to build.

I've googled fe127e and a bunch of things and can only find folded pipe designs.

Anyone know of an unfolded pipe design for it or similar driver (that's still made; there's tons of plans online of RatShack drivers no longer made) a MLTL or TQWP kinda of enclosure.

I looked at this page--
https://mywebspace.wisc.edu/jstalnak...Speakers/#TQWT
but the small designs are for that RatShack driver.

I image allow I really need to know is how the calculate the length, the base area, and the area of the port. Anyone have a spreadsheet for that? I found the one for the BIB and one for folded pipes but not straight.
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Old 7th February 2008, 05:01 AM   #2
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Metronome?

dave
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File Type: gif 127-met-3d.gif (23.8 KB, 672 views)
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Old 7th February 2008, 05:22 AM   #3
GM is offline GM  United States
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BB's RS pipe can be used, though I recommend moving the driver up from 30" to 24" from the top and like most narrow baffle speakers it will probably require a BSC filter: http://www.geocities.com/rbrines1/Pa...ight_Pipe.html

GM
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Old 7th February 2008, 11:44 AM   #4
kvk is offline kvk  United States
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Quote:
Originally posted by GM
BB's RS pipe can be used, though I recommend moving the driver up from 30" to 24" from the top and like most narrow baffle speakers it will probably require a BSC filter: http://www.geocities.com/rbrines1/Pa...ight_Pipe.html

GM

Would mechanically BSC with one of those disk things be effective enough? I think they are kinda cool looking. Or would it just push the point down but not enough?
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Old 7th February 2008, 02:45 PM   #5
GM is offline GM  United States
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It will if it's ~8 ft square. You will need one of the high gain BLHs to offset the LF/mid-bass/lower mids loss if not built into a wall. Then again, these little drivers by themselves really should only be critically listened to either up close and/or in a small room when tuned below ~1.6*Fs as they rapidly begin sounding 'congested' due to their low Xmax, so depending on the driver's HF response in these situations they may not need any BSC.

GM
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Old 7th February 2008, 03:08 PM   #6
SCD is offline SCD  Canada
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Default FE127 bipole TQWP

Here is a picture of an interesting project I made a few years ago. They are bipoles. I quite like the sound of them. The new owner seems quite happy with them.
If you are interested I am sure dave could send you the design.
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File Type: jpg fe127 tqwp small.jpg (44.3 KB, 705 views)
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Old 7th February 2008, 03:29 PM   #7
kvk is offline kvk  United States
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Quote:
Originally posted by GM
It will if it's ~8 ft square.

GM
Do you mean 8'x8' or 8'^2 ?

8'^2 would only be a disk with R=1.77'. Two small round kitchen table-tops should do.
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Old 7th February 2008, 04:05 PM   #8
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http://www.zillaspeak.com/fostex127eStraightPipe.asp

I used BB's straight pipe and just swapped out the RS drivers for the 127e and they sounded better. May not be an optimal cabinet but the speakers look great and sound great too.

Godzilla
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Old 7th February 2008, 04:13 PM   #9
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8' x 8'........
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Old 7th February 2008, 04:21 PM   #10
kvk is offline kvk  United States
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Quote:
Originally posted by Godzilla
http://www.zillaspeak.com/fostex127eStraightPipe.asp
I used BB's straight pipe and just swapped out the RS drivers for the 127e ...

Godzilla
Were the removable baffles just to swap drivers or do the server some other purpose?

Like maybe providing bigger wholes to tune stuffing?
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