Acoustic Horn Design – The Easy Way (Ath4)

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#501
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...
 

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#505
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.
 
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#507
mabat said:
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.
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Dear Marcel I can print new one if you send me file. That waveguide was early STH. Project enclosed.
 

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#508
jzagaja said:
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.
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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?
 
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#509
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":
 

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#512
The DSA315 is virtually resonance-free up to nearly 4 kHz, which is not bad for a 12" woofer. Then is starts to ring (an aluminum cone) but that should be high enough to be filtered out sufficiently - I hope.
- This is one of the many woofers I have lying around here. It may still end up in some direct radiating three-way.
 

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#514
Some of those bass guitar woofers are usuable, especially if these are designed to reproduce a clean tone (without breakup overtones/coloration).

This is one of my favorites. It's basically a slightly modified Sica 10 2.5 PL.

038210833_1-87a9b38f017a88098a240ffc10d211a2.png
 
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#517
mabat said:
The DSA315 is virtually resonance-free up to nearly 4 kHz, which is not bad for a 12" woofer. Then is starts to ring (an aluminum cone) but that should be high enough to be filtered out sufficiently - I hope.
- This is one of the many woofers I have lying around here. It may still end up in some direct radiating three-way.
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Did you mount it in a cab/baffle to get an impression of the sound signature?
Thick rubber rol surround + metal cone may lack midrange snappiness and 'paper' warmth.
I have to admit, the plots look promising and the motor structure appears to be properly engineered.
 
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