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Thread: Favorite woodhorn ?

  1. #1
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    Favorite woodhorn ?

    A friend of mine asked me for the best sounding midrange horn I know of, but I haven´t listened to most of them yet and have to ask you guys.
    I can call the westlake aka 2397 my own and really like it.
    But he is looking for a possible crossover of aprox. 500-600hz.

    The yuichi horn which seems to be a TAD copy came to my mind. Seems to be highly regarded and without any imperfection.

    But I have found some pics of a Yamamoto wood horn that looks mighty impressive. 80cm (32") wide and 33cm (13") tall
    http://audio-heritage.jp/YAMAMOTO/unit/f280a.html
    Any experience with this monster of a horn?


    Regards,
    Olaf

  2. #2
    Senior Member ivica's Avatar
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    Quote Originally Posted by Dr.db View Post
    A friend of mine asked me for the best sounding midrange horn I know of, but I haven´t listened to most of them yet and have to ask you guys.
    I can call the westlake aka 2397 my own and really like it.
    But he is looking for a possible crossover of aprox. 500-600hz.

    The yuichi horn which seems to be a TAD copy came to my mind. Seems to be highly regarded and without any imperfection.

    But I have found some pics of a Yamamoto wood horn that looks mighty impressive. 80cm (32") wide and 33cm (13") tall
    http://audio-heritage.jp/YAMAMOTO/unit/f280a.html
    Any experience with this monster of a horn?


    Regards,
    Olaf
    Hi Olaf,
    May be You can start with Yuichi A290 wooden horn
    http://www.geocities.jp/arai401204/Horn/A290/A290.html
    as a lot of info can be find

    reagrds
    ivica

  3. #3
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    Hi Ivica,

    yes indeed, the yuichi seems to fit his demands.
    But we where wondering if there is a bigger version of this around?
    He was thinking of using a JBL 2482 with phenolic diaphragm to inshure safe use from 500hz or even below.
    But yuichi "only" supports safe crossover from 600hz and above...

  4. #4
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    I know several people using JBL 2" drivers on TH-4001 crossed at 500Hz of even a bit lower. I had several time the opportunity to listen to JBL 2450 or 2446 in such a configuration. This is working well. Arai290 is a bit different but you should be able to do the same.

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    Iwata

    This horns should be quite intresting, and about the same size as the larger yamamoto
    I have not listened to it myself. Only the smaller version from autotech, but I am sure it would aound wonderful with a decent driver and imo it looks beautiful

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    It is also large enough to give proper loading down to 500hz if the driver is up for it

  6. #6
    Senior Member Ian Mackenzie's Avatar
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    Going lower is not always the answer

    Diaphragm excursion goes up and so does distortion

    The polar response of the horn can change significantly at the bottom end too making crossover behaviour unpredictable

  7. #7
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    500hz on the yuichi a290 could work, but I like the idea of doubling the cutoff for actual crossover (2*290hz= 580hz)... As Ian said, goin to low may introduce more problems than benefits. At small levels a 500hz crossover probaply works well thou...

    That´s the reason my buddy was looking for a bigger wood-horn than yuichi...
    The Iwata shure looks impressive I have to say!

  8. #8
    Senior Member ivica's Avatar
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    Quote Originally Posted by Dr.db View Post
    500hz on the yuichi a290 could work, .....

    That´s the reason my buddy was looking for a bigger wood-horn than yuichi...
    The Iwata shure looks impressive I have to say!
    Hi,

    but the horizontal dispersion a290 (with FINS) I would expect to be much, much more then Iwata horn type.

    ivica

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    Super Moderator yggdrasil's Avatar
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    Quote Originally Posted by ivica View Post
    Hi,

    but the horizontal dispersion a290 (with FINS) I would expect to be much, much more then Iwata horn type.

    ivica
    Isn't narrow dispersion a HF issue?

    @Dr.db: Did you say anything about the high crossover point?

    Here's a picture of an Iwata horn used from ~200Hz if I remember correctly: http://www.audioheritage.org/vbullet...l=1#post208877
    Johnny Haugen Sørgård

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    Quote Originally Posted by yggdrasil View Post
    ....Here's a picture of an Iwata horn used from ~200Hz if I remember correctly: http://www.audioheritage.org/vbullet...l=1#post208877
    I think, it's an heavy adapted Iwata 2" horn (in DIY) ....
    Best, ask it to or musical friend "mafuta" or ... "JDZA" ...
    It's music .... I like it.
    Karel

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    Yes, the dispersion of the Yuichi should be much better.
    I actually think the yuichi might be the best of both worlds...

    That Iwata looks freaking massive!
    It should match well with a JBL 2482 or 2485 for a very low crossover, or what do you think?

    He plans to use the mid-horn with either a ring-radiator or 1" high-horn.
    In case of the yuichi he would go with a 2405 and 10khz crossover...
    In case of a bigger midhorn matched with a 2482 he would go with a JBL 2426 in a small horn and ~3,5khz crossover...

  12. #12
    Super Moderator yggdrasil's Avatar
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    I believe that big Iwata was designed for the 3" 2490.

    So - the goal is to use one horn from ~500Hz to 10KHz.

    As you mention - the Yuichi 290 should be a good choice. Designing a bigger horn from scratch is a very difficult task to pull off. IME the most difficult tasks are getting a desired HF response, HF dispersion and flat (-ish) response curve.

    The Iwata have been iterated on the forum before. Here's a post with the response curve: http://www.audioheritage.org/vbullet...l=1#post317612
    Johnny Haugen Sørgård

  13. #13
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    Quote Originally Posted by yggdrasil View Post
    I believe that big Iwata was designed for the 3" 2490.

    So - the goal is to use one horn from ~500Hz to 10KHz. .....
    FI
    @ Yggdrasil
    @ dr.db

    I count from 500Hz to 10kHz more than 4 octave .... perso my experiences, to much for driver & horn ....

    Karel

  14. #14
    Senior Member berga12's Avatar
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    Iwata or yuichi290


    the yuichi seems the best for TAD driver, used also by TAD.

    construction plans are also available for both.

    I Listen 2441 on Iwata horn and it's way better than already good Jbl2350.

  15. #15
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    @yggdrasil:

    Yes, aprox. 500-10.000hz is the goal, but if the horn would support a little lower than 500hz that would be in his interest.
    But he doesn´t want to design a new horn, as he isn´t a professional at this.

    Thanks for the link, very interesting.

    @berga:

    Which construction plans for Iwata do you know of?
    Could you share these with us?

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