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Thread: Ring Radiator Comparisons

  1. #16
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by Oldmics
    Come on Widget

    Put the T.A.D. ET 703 plot in there for comparison.

    Inquiring minds want to know.

    Oldmics
    But it's not a "ring radiator".

    Widget

  2. #17
    Senior Member Ian Mackenzie's Avatar
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    Somewhere I have a design for a notch filter to improve the 2405, that peak below 8000 looks enormous.

    Ian

  3. #18
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    TAD 703

    As I recall the 703 on axis has a very broad peaked resonse around 15kHz, something to the tune of 10 dB, that must be addressed. Maybe Widget can enlighten us with off axis scans.

    Cyclotronguy

  4. #19
    Administrator Mr. Widget's Avatar
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    Yeah, the TAD does have a rather un-textbook like on-axis curve. The pair of ET-703s I currently have are stuck in these cabinets and I can't stop listening to them long enough to pull the tweeters out and do some measurements of them. I have ordered veneer samples and will eventually need to pull out the drivers and finish the speakers. I'll post the curves then.

    Widget
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  5. #20
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    TAD Et703......Being a diffraction type horn I would like to see off axis poler plots of this tweeter.
    Vlad

  6. #21
    Senior Member Jan Daugaard's Avatar
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    2407

    Hi Widget,

    there is a fifth ring radiator: The 2407H / 2407J which JBL is using from 1200 Hz. Any chance of some measurements for this new ring radiator?

  7. #22
    Senior Member Jakob's Avatar
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    Nice work Widget!

    What driver and horn are You using for lows and mids?

    Thank You for the measurments!

    BR: Jakob

  8. #23
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by Jan Daugaard
    Hi Widget,

    there is a fifth ring radiator: The 2407H / 2407J which JBL is using from 1200 Hz. Any chance of some measurements for this new ring radiator?
    I don't know anything about the 2407, but after doing a quick search on the JBL Pro site, it appears to be a 1.5" light weight compression driver with unique diaphragm. I would assume it is more closely related to the drivers we tested here:

    http://audioheritage.org/vbulletin/s...ead.php?t=6050

    It does not appear to be a ring radiator.

    Widget

  9. #24
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by Jakob
    What driver and horn are You using for lows and mids?
    The woofer is a JBL 1500AL and the mid driver is TAD TD4003 on a TAD TH4003 horn clone.

    Widget

  10. #25
    Senior Member stevem's Avatar
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    1500AL

    How do you like your 1500AL woofers? Can you compare their performance to other JBL woofers like the 2235H or the 1401Nd? What size enclosure are you using? Thanks!

  11. #26
    RIP 2014 Ken Pachkowsky's Avatar
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    Dissapointing Results on the 2403's

    Wow, thats a kick in the butt. So much for adding these 2403's to my Westlakes. I will leave them stock 2405's.

    Thanks Widget

    Ken

  12. #27
    Senior Member Ian Mackenzie's Avatar
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    I would still try them....trust your ears..then read the graphs....not visa versa.

    The Doctor

  13. #28
    RIP 2011 Zilch's Avatar
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    I wouldn't be surprised if Mr. Widget used 'em hisself....

    [The look alone is compelling....]

  14. #29
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    I had a feeling the cat eyes would not be much different to the 2405. I mean if it was that much better than the 2405 you would think JBL would not drop it from production. Most likely westlake wanted a ultra hf unit on their top of the line system and figured the cat eye would look a bit more unique than the common 2405???

  15. #30
    Senior Member Ian Mackenzie's Avatar
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    The lower mass and hence vastly superior transient capabilty is the issue.

    You can EQ the crap out of any driver/ horn and it will look flat to the naked eye but that's not how it sounds.

    The Doctor

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