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Waveguides and horns

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#862
Tome the top octave looks noticeably smoother with the stock phase plug.

jzagaja said:
... see below graph normalized to flat power. Better repeat on SEOS and baffle.
Click to expand...

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.
 
#863
ARTA directivity sonogram.
 

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#868
jzagaja said:
Enclosed. For samples please contact Autotech: info at autotech.pl
Click to expand...

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?
 

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#875
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
 
#877
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 ?
 
#879
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?
 
#880
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?
Click to expand...

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