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In the Forum: Horn-Loaded Speakers
In the Thread: Yamamura's 6 ways

Post Subject: Yamamura's 6 waysPosted by Romy the Cat on: 8/3/2013

TwoGoodEars posted at his blog a report about is listening session or some kind of installation. I still have no idea who’s installation it is: Jean Hiraga or Be Yamamura. Nevertheless, I think it very much worth to look into it.

http://twogoodears.blogspot.de/2013/07/jean-hiraga-meets-ale-and-be-yamamura.html

I presume if Jean Hiraga is involved that it is all 12 channels of Hiraga SS amplification. It is 6 ways with bass drivers but I can see only one upper bass horn witch is in my estimation is about 60Hz-70Hz. Where is the mouth of lower bass horn and how low it goes I do not know. The owner looks like stick to all ALE drivers and Presume he knows them well. No valuable data is provided by TwoGoodEars – no idea how he mitigated the Fs of the bass drivers for the specific horns.

The upper horns are straight forward and made from metal with “exotic and elegant oxide”. I am not a big fan of metal horns and the mentioning the “exotic and elegant oxide” sound like BS to me.

The horns are stuck nicely in the corners of the given room and the long extension of the bass horn looks like smartly organized. The horizontal offset of the channels axes of course is a big no-no in my book but this setup has a secretive tool to fight with it - 20th order (120 db/octave) crossover. With this croosovering any crosstalk between the channels does not exist. How the horizontally offset channels are integrated with each other in this configuration? I have littlest ia in this case as I never can imagine how 120 db/octave would sound. Obviously this brick wall filter has very violent phasing problem but it is line level against fix impidance and they might be able to hold it somehow by attempting to run phase-minimal slopes. I do not know and TwoGoodEars of cause is silent about it.

The use of digital croosovering of cause is the most questionable in context of this system, particularly in the case of ALE driver that have high capacity t react to minimum impedance. With 120 db/octave slopes even if they use 24 bit depth they will have at minus 6dB some kind 8 bit resolution, almost like a telephone sound. The question is: will be able to hear and to recognize that minus 6dB in context of 120 db/octave slope? I do not know the answer.

Generally I very comfortably and accurate can predict some characteristics of playback sound just looking at the pictures but in case of this system I do not know. For sure it is close-bottom system and it will not have “that” bass but that is not something that I would consider important. IT would be interesting to hear this installation.

The Cat

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