Waveguides and horns

[jzagaja]

You need gently knock out with a broomstick and remove glue residue by wetting in acetone an hour or so. I'll ask Autotech for samples.

 

[noah katz]

Tome the top octave looks noticeably smoother with the stock phase plug.

... see below graph normalized to flat power. Better repeat on SEOS and baffle.

I find it hard to judge the directivity performance of anything other than a spectrogram normalized to flat on-axis response.

I'm not sure why, but I also find the stepped shaded graphs harder to digest than the previous smooth shaded ones.

Thanks for all your effort, jzagaja.

 

[jzagaja]

ARTA directivity sonogram.

 

[_Wim_]

ARTA directivity sonogram.

Could you post the raw impulse data also? Then we can generate any view we want for comparison... Many thanks

 

[jzagaja]

Enclosed. For samples please contact Autotech: info at autotech.pl

 

[guglielmope]

Hello,
B&C phase plug look the same of that mounted on my Radian 475 PB as you can see in the picture.
Do you think that I can try your phase plug also on that driver without any problem?
Ciao
Guglielmo

 

[jzagaja]

Internal dimensions are unknown. Remove and measure.

 

[_Wim_]

Enclosed. For samples please contact Autotech: info at autotech.pl

Hello jzagaja,
I get some strange results looking at the raw data. I had to convert your files to pcm-format with Audacity before Arta could read them. But there seems to be something strange with level, as the higher of axis measurement are louder than the on-axis measurements. Did you make the measurements with Arta, of did you use some other software?

 

[jzagaja]

ARTA files enclosed.

 

[hum4god]

iwata and B7C DCM50 ?

Hi jzagaja

did you ever get a chance to listen and measure the B&C DCM50 with one of your horns?
i would be especially interested how it sounds and measures w/ the Iwata 300 ?

thanks

 

[hum4god]

iwata and B7C DCM50 ?

Hi jzagaja

did you ever get a chance to listen and measure the B&C DCM50 with one of your horns?
i would be especially interested how it sounds and measures w/ the Iwata 300 ?

thanks

 

[jzagaja]

Not yet. We use BMS and Radian/Truextent.

 

[454Casull]

What's the availability of the Mummy speaker?

 

[jzagaja]

Please ask Diysoundgroup.

 

[hum4god]

K HORN

Hi


i just saw the K Horn on the autotech page and was wondering if someone has more details ???
how do they compare to the iwata 300 regarding directivity ?
how do they sound w/ radian 950 etc. .....?
oh yeah and of course , what's the price ?


malcolm

 

[jzagaja]

K-horn is similar to Klangfilm KL51, spherical horn, to be used instead of JMLC-400, slightly wider dispersion (5-10deg). Price -> diysoundgroup.com

 

[hum4god]

K Horn vs. Iwata

Thanks for the comparison graph.
you say : to be used instead of JMLC-400 .
jmlc-400 has a recommended xover point of 600hz , KL51 has min rec. freq. of 400hz .
i thought i can take the KL51 down to 400/500hz according to autotech page .
have you had a chance to listen to KL51 ?
any comparison to iwata 300 re sound ?

 

[jzagaja]

Instead I meant mouth size, it's longer. I don't have a space (having Mummy and Universe) for test loudspeaker and horn swap. Autotech is building such for private use. They focused on listening test regarding JMLC-200T with Radian 950PB/Truextent and JBL 4560 bass bins (a friend installation).

 

[krzys]

I got JMLC 350 trough Erich’s diysoundgroup. They sound wonderfully with GPA 288, much much better than the Stereo Lab Tractrix 400 horns.

I have a question: there is a kind of tape on the outer edge of the horn. Is this tape embedded in the gel coat or it is just a protection for transportation purpose? I haven’t dared to try to take it of. Any owner of the Autotech horns had the same?

 

[jzagaja]

I have a question: there is a kind of tape on the outer edge of the horn. Is this tape embedded in the gel coat or it is just a protection for transportation purpose? I haven’t dared to try to take it of. Any owner of the Autotech horns had the same?

This is topcoat masking layer needed when you join two parts in this case horn and its rollback. Can be sanded when painted.