Waveguides and horns

[jzagaja]

It's rather good when phasing plug length is equal or smaller than dome radius and transition between channels and waveguide contour is smooth? This require inverted type driver, maybe some neodymium could work. Go back to the roots (WE555).

 

[jzagaja]

Soongsc has simulated similar few years back with good results.

 

[jzagaja]

Small little wonders.

 

[jzagaja]

Polars.

 

[jzagaja]

Small comparison - note ejmc-2000 is hand size.

 

[jzagaja]

Pioneer S-910 beryllium ribbon with short waveguide, profile looks like "minphase" .

 

[vanloi]

Hello all,

Please can I have an idea of the wider of the 'sweet spot' regarding the jmlc350,
the iwata300 and the e-jmlc300.
By "sweet spot', I mean the wider of the optimal listening zone.
Thanks

Van Loi

 

[jzagaja]

EJMLC gives twice as wide sweet spot in horizontal axis, can be considered as replacement for TAD TH-4001, JBL 2345.

 

[vanloi]

Thank you for the answer,

Have you similar schema regarding the iwata300. It is very useful for me to make choice for one of the horn above..
Actually, I am using a TAD 4001 CD coupled with my wooden Diy bi-radial horn (similar to the TAD TH-4001), the plan was provided by MJ magazine in Japan.

A couple of year before, I had the opportunity to hear and compare by switching my horn and with the Jmlc horn by 'Musique concrète' with my set up. I was very impressed by the musical quality of the jmlc horn. The musical enjoyment still remain with me, I guest that is the quality of the jlmc curve calculation.
For this purpose,I had dropped some word to Jean Michel Le Cléac'h at one HI-FI show in Paris.

One more question: what is the pricing+shipping of a pair of ejmlc-300 horn. Ship to France.

Thanks

Van Loi

 

[jzagaja]

If you need a really wide listening area then use 1.4" waveguide and driver - for example Radian 951PB. For pricing please contact manufacturer: info at autotech.pl

 

[jzagaja]

New phasing plug for DE250.

 

[guglielmope]

Hello,
I’ve a pair of Coaxial Silver Iris Speakers clone that use with a Radian PB475 driver as tweeter.
It use the cone of the 10” mid Woofer as Horn.
The crossover frequency is about 1,5Khz.
I’m very happy with this setup but now I’d like to try to use for the PB475 a real horn.
What do you think about?
Can you suggest me a horn that I can use with the same Cross frequency for better performance?Normally my earing position is about from 2 to 3m of distance from the speakers and I think that a good dispersion is very important in this condition.
Thanks for your help
Guglielmo

 

[jzagaja]

Consider:

EJMLC-600
IWATA-600

 

[Ed LaFontaine]

Greets,

New phasing plug for DE250

We will want to know when we can buy a pair.

 

[jzagaja]

And here are the results.

 

[jzagaja]

Phase at 20 deg.

 

[454Casull]

Is there any significant difference between the two?

 

[jzagaja]

Good question. BC has minimized cone breakup so it doesn't peak in power response but Fresnel seems to have slightly more even phase and directivity - see below graph normalized to flat power. Better repeat on SEOS and baffle.

 

[454Casull]

Looks very close to me. The OE phase plug looks a little bit better at ~25 degrees off-axis whereas yours looks better nearer-on-axis.

 

[_Wim_]

Good question. BC has minimized cone breakup so it doesn't peak in power response but Fresnel seems to have slightly more even phase and directivity - see below graph normalized to flat power. Better repeat on SEOS and baffle.

Looks good. Any idea yet what it would cost? How do we install this device (and remove the original one)? Do you have some pictures of the installation process?