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Thread: Truextent diaphragms measurements

  1. #16
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    Will the 4088 be a replacement for a 2430?

  2. #17
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    Retrofitting with "truextent'

    Any JBL 2" format driver (except 2480,2482) will sound better, smoother , more detailed;
    Than any Alum. or Ti. fitted driver PERIOD Field coil versions of the truextent 4" and 3" 2435 dia
    are even better. Unless you are committed to a "vintage" sound .
    The driver/horn combo must remain the same in your comparisons.
    Frequency graphs will show "smoothness" but give no indication of detail,attack and decay,
    which are all a part of proper music reproduction
    jw5115

  3. #18
    Senior Member pos's Avatar
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    A little update with a more recent measurement comparing a 2452H and a 2450SL with truextent diaphragm on a PT-F95HF waveguide.

    It should be more reliable than the measurements on the first page because the noise/distortion coming from the amp has been minimized to have no impact on the measurement (using an autoformer or a Lpad, can't remember...).
    It is the 3rd order harmonic distortion only, as my mic is not good at measuring 2nd order harmonic distortion...

    Name:  2452H vs 2450Be disto.jpg
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  4. #19
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    Here's a link to Vue Audiotechnik and their info article on using Truextent diaphragms in their latest products.
    http://www.vueaudio.com/about/beryllium/

  5. #20
    Senior Member Champster's Avatar
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    Quote Originally Posted by Mike Caldwell View Post
    Here's a link to Vue Audiotechnik and their info article on using Truextent diaphragms in their latest products.
    http://www.vueaudio.com/about/beryllium/
    I had an opportunity to get a personal tour through VUE with Ken Berger, CEO. What a great guy and cool business. I wish I could work there... What great products too. Their DSP systems are killer. They have an isobaric sub with 4 - 18" drivers that I would love to try out at home. They are the only Pro company using Be as far as I know and, based on their growth, it sure looks like that gives them a great competitive advantage over the other guys.

  6. #21
    Senior Member grumpy's Avatar
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    "They are the only Pro company using Be as far as I know"

    I can think of at least one other...

  7. #22
    Dang. Amateur speakerdave's Avatar
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    Two.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  8. #23
    Senior Member Champster's Avatar
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    Quote Originally Posted by grumpy View Post
    "They are the only Pro company using Be as far as I know"

    I can think of at least one other...
    Quote Originally Posted by speakerdave View Post
    Two.

    You're both so cleaver. Care to share?

  9. #24
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by Champster View Post
    You're both so cleaver. Care to share?
    Well... they both use three initials for their names.


    Widget

  10. #25
    Administrator Mr. Widget's Avatar
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    Oh, what the heck... TAD and JBL.

    Since the mid '70s TAD had something of a monopoly on Be in the Pro world, but in the last decade JBL has stepped up. Heck, if they hadn't I'm pretty sure the higher end JBLs and even the Revel tweeters probably wouldn't be made of pure Be foil.


    Widget

  11. #26
    Senior Member grumpy's Avatar
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    Then there were the Yamaha NS-series monitors...

    hint of snark perhaps due to this being a JBL forum where many would have been exposed to the use of Be in TAD and JBL drivers.

    ...so, I'll take the cleaver.

  12. #27
    Senior Member Champster's Avatar
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    Quote Originally Posted by grumpy View Post
    Then there were the Yamaha NS-series monitors...

    hint of snark perhaps due to this being a JBL forum where many would have been exposed to the use of Be in TAD and JBL drivers.

    ...so, I'll take the cleaver.

    Hey this is a hobby. We're supposed to be enjoying this and I love the snarky responses. It makes the discourse more entertaining...to me.

    However, in my defense, I think the, "as far as I know" phrase was my out. And when I use the term "professional" I mean professional venues. Not home audio using Pro gear. Granted, TAD was an oversight. Of course I know that they play in the Pro space. However, re JBL, and again, to the best of my knowledge, JBL has never used a Be phram in a commercially available Pro box. Is that true or false? If so why haven't I found it within all the collective wisdom in these pages and what is the part number?

  13. #28
    Senior Member grumpy's Avatar
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  14. #29
    Senior Member Champster's Avatar
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    You guys are a great resource. So I learned something (else) new today...

    Was/Is the 2435h a commercially successful effort? Is it (with a Be phram) still available? I've read how well regarded the 435Be is, but does the 2435h share the same praise?

    I purchased a few TruExtent phrams on my visit to VUE. So now I have a pair of 2446h with the original Ti ribbed phrams, a pair of TAD 4001's with Be and the TruExtent Be phrams for the JBL's to play with in my homebrew DIY system... That is, after I get past all of this woodworking.

    Thanks again! You guys are great!!!!

  15. #30
    Senior Member martin2395's Avatar
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    Quote Originally Posted by grumpy View Post
    Then there were the Yamaha NS-series monitors...

    hint of snark perhaps due to this being a JBL forum where many would have been exposed to the use of Be in TAD and JBL drivers.

    ...so, I'll take the cleaver.
    I have a pair of those Be loaded Yamaha NS1000M studio monitors. Sometimes you could think that there is something wrong with either the speakers or your source / amp as they are amazingly revealing, certainly not for everyone's taste.

    BTW, I'm not sure if it's Be or aliminium with Be on it.

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