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Old 1st December 2012, 04:20 AM   #1
KoHo is offline KoHo  United States
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Default Zen Acousta

Hi, here my design, Zen Acousta.
Back loading horn with field coil Lowther drive.
Attached Images
File Type: jpg Zen Acousta.jpg (62.8 KB, 1680 views)
File Type: jpg Zen Acousta Top.jpg (71.0 KB, 1624 views)
File Type: jpg Hanging ropes top.jpg (69.7 KB, 1584 views)
File Type: jpg Hanging ropes.jpg (57.7 KB, 1539 views)
File Type: jpg Field Coil Lowther.jpg (70.7 KB, 1505 views)
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Old 1st December 2012, 04:29 AM   #2
KoHo is offline KoHo  United States
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Custom make Field Coil Magnet.
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File Type: jpg Field Coil Lowther w: Power supply.jpg (78.0 KB, 561 views)
File Type: jpg FC close-up.jpg (72.8 KB, 463 views)
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Old 1st December 2012, 09:14 AM   #3
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Nice work.
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Old 1st December 2012, 09:37 AM   #4
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Nice work & try with rubber bands instead of rope ( they need to be stretched till the box
would have then the possibility to swing at very low cycles....2-3 Hz are subsonic frequencies and well out of band )


Hmmm...nice work, wait: why that wooden disk outside the driver ? Nobody told you about border diffraction and
tunnellification of sound ?

Last edited by picowallspeaker; 1st December 2012 at 09:40 AM.
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Old 1st December 2012, 03:48 PM   #5
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Stunning! Ingenious and original. Can you tell us more? For example:

* How did you design / calculate it?
* What is the Qts of the resulting driver/voltage?
* What is the lower cutoff in-room (e.g., 60hz or 50Hz or ...?)
* Details of the amp?
* What is your rationale for skipping a back-chamber perhaps?

Thank you in advance.
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Old 1st December 2012, 04:24 PM   #6
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Hey is that the one that was at burning amp?
Sweet!
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Old 1st December 2012, 09:30 PM   #7
KoHo is offline KoHo  United States
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Quote:
Originally Posted by Melo theory View Post
Hey is that the one that was at burning amp?
Sweet!
Yes, same speakers at Burning Amp, thank for attended and hope you like it.
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Old 1st December 2012, 10:13 PM   #8
KoHo is offline KoHo  United States
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Quote:
Originally Posted by picowallspeaker View Post
Nice work & try with rubber bands instead of rope ( they need to be stretched till the box
would have then the possibility to swing at very low cycles....2-3 Hz are subsonic frequencies and well out of band )


Hmmm...nice work, wait: why that wooden disk outside the driver ? Nobody told you about border diffraction and
tunnellification of sound ?
Hi
Thank for suggestion, I'm using cotton rope now, will try rubber bands.
Swing at very low cycles....2-3 Hz!!!Absolutely good suggestion as my turntable sling setup.
The reason why the wooden disk outside, because of the front loading horn.
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File Type: jpg image.jpg (196.0 KB, 505 views)
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Old 1st December 2012, 11:08 PM   #9
xrk971 is online now xrk971  United States
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Very cool design. Do you use stuffing inside or find that too much higher frequencies get through the horn since it is so smooth?
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Old 2nd December 2012, 05:29 AM   #10
KoHo is offline KoHo  United States
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Quote:
Originally Posted by xrk971 View Post
Very cool design. Do you use stuffing inside or find that too much higher frequencies get through the horn since it is so smooth?
To make the sound smooth.....smoother inside tunnel sound better.
I using sand paper hand sand, 200,320,600 then 1200.....and take time!
Some old wrinkle paper had been add inside the throat area.
Personal, I prefer inside empty, or less absorb material, to keep the music detail as much as possible.
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File Type: jpg image.jpg (150.5 KB, 477 views)

Last edited by KoHo; 2nd December 2012 at 05:32 AM. Reason: Add photos
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