Zen Acousta

[KoHo]

Hi, here my design, Zen Acousta.
Back loading horn with field coil Lowther drive.

 

[KoHo]

Custom make Field Coil Magnet.

 

[Scottmoose]

Nice work.

 

[picowallspeaker]

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 ?

 

[rjbond3rd]

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.

 

[Melo theory]

Hey is that the one that was at burning amp?
Sweet!

 

[KoHo]

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.

 

[KoHo]

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.

 

[xrk971]

Very cool design. Do you use stuffing inside or find that too much higher frequencies get through the horn since it is so smooth?

 

[KoHo]

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.

 

[KoHo]

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.

Hi
I think simple is the best!
Simplify TP1, 116 Acousta , Hedlund horn, only take the advantage of those classic design.

Qts: from 0.2 (100V DC) to 0.3(78V DC)

Excellent lower frequency extend down to 50Hz, even lower depend on room size.

 

[KoHo]

My System

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.

Some of my Tube stuff.....

 

[KoHo]

The making of Zen Acousta.

 

[rjbond3rd]

Absolutely beautiful.

 

[xrk971]

The design is really sublime. I really like your work - absolutely beautiful workmanship. I wonder how this would sound made out of foam core board?

 

[KoHo]

The design is really sublime. I really like your work - absolutely beautiful workmanship. I wonder how this would sound made out of foam core board?

Hi, I using 1/2 inch plywood as the sound board, sound come out really deep mid-bass and warm.

 

[xrk971]

I am having a hard time appreciating the scale of your horn cabinet without a size reference. What are the dimensions of the mouth, the cross section, length, etc? Are there any internal structures or is it just a smooth channel all the way out?

 

[KoHo]

Zen Acousta Plan

Here the Plan!
Horn wide 17 inch,
use 1/2 inch Plywood.

 

[xrk971]

Thanks for the plan KoHo. It's actually quite simple. I might have to give this a try in my quick-and-easy foam core board. I don't have a fancy Lowther, what might you suggest as the equivalent diameter FR budget driver to use? What are the key params to try to match for driver?

 

[KoHo]

Thanks for the plan KoHo. It's actually quite simple. I might have to give this a try in my quick-and-easy foam core board. I don't have a fancy Lowther, what might you suggest as the equivalent diameter FR budget driver to use? What are the key params to try to match for driver?

Hi xrk971
Zen Acousta are design for Lowther or any other FR has Low Qts drive,
simple horn design better than my other horn( Lowther TP1, Acousta, Medallion and Hedlund....)
try some drive with better high frequency, let the horn do his job to produce bass.
Personally, I prefer some twin paper cone and Alnico drive, sound smooth, New drive such as Fostex FE206, Tang Band W8..... and vintage Philips 9710 on Ebay.
Keep in touch
Thank
KoHo