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-   -   Acoustic Horn Design The Easy Way (Ath4) (https://www.diyaudio.com/forums/multi-way/338806-acoustic-horn-design-easy-ath4.html)

Ro808 16th October 2019 06:17 AM

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JBL obviously decided to gloss over specific details for the final specsheet in order to make the product 'look' better, more believable or: less stupid.
100dB sensitivity and (-10dB) 35Hz-18kHz 4pi, max. continuous SPL: 124dB...

jzagaja 17th October 2019 09:40 AM

Marcel, do you have an idea about exchngable throat? Different throat size leads to different length where contours are tangent.

Ro808 17th October 2019 02:29 PM

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Does anybody have experience with B&C DE360 or DE111 and XO @ 1200-1500Hz?
The response of the DE360 looks exceptionally clean.

jzagaja 17th October 2019 04:05 PM

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My friend bought DE360 and I printed STH 12", he also bought Dayton waveguide. He preferred Dayton for timbre and STH for imaging. He didn't like HF - lack of power on maraca instruments so gave me DE360 that collects dust and bought Daytons.

mabat 17th October 2019 04:53 PM

It could be informative to see the polars. I think it would show that this is not a particularly good way how to do it - the termination seems too abrupt. Maybe (just my conjecture) for bigger horns there is a less detrimental effect but in this case it wouldn't surprise me if the result was not very good. A smaller waveguide in a rounded baffle could do a better service.

mabat 17th October 2019 04:55 PM

Quote:

Originally Posted by jzagaja (https://www.diyaudio.com/forums/multi-way/338806-acoustic-horn-design-easy-ath4-post5947107.html#post5947107)
Marcel, do you have an idea about exchngable throat? Different throat size leads to different length where contours are tangent.

So far I haven't figured out how to do it. The whole profile is very different for a different throat.

jzagaja 17th October 2019 05:13 PM

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Quote:

Originally Posted by mabat (https://www.diyaudio.com/forums/multi-way/338806-acoustic-horn-design-easy-ath4-post5947448.html#post5947448)
It could be informative to see the polars. I think it would show that this is not a particularly good way how to do it - the termination seems too abrupt. Maybe (just my conjecture) for bigger horns there is a less detrimental effect but in this case it wouldn't surprise me if the result was not very good. A smaller waveguide in a rounded baffle could do a better service.

Dear Marcel I can print new one if you send me file. That waveguide was early STH. Project enclosed.

Ro808 17th October 2019 05:32 PM

Quote:

Originally Posted by jzagaja (https://www.diyaudio.com/forums/multi-way/338806-acoustic-horn-design-easy-ath4-post5947409.html#post5947409)
My friend bought DE360 and I printed STH 12", he also bought Dayton waveguide. He preferred Dayton for timbre and STH for imaging. He didn't like HF - lack of power on maraca instruments so gave me DE360 that collects dust and bought Daytons.

Ah Yes, I forgot about those ;)
Which crossover was used between the DE360 and the (I suppose) 6 or 8" woofer?

The 3-way with ring- and mid-dome is another project?

mabat 17th October 2019 05:39 PM

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I have the DE360 and plan to build some smaller waveguides for them to be put into an enclosure. But I'm very (very) slow these days regarding anything practical so you'd have to wait or design it yourself.

A nice pair, 10" + 18":

mabat 17th October 2019 05:41 PM

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BTW, this is an equalized frequency response of 12" Dayton DSA315-8 placed in a box:


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