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    I assume you're after audio (vs electrical)...

    I assume you're after audio (vs electrical) measurements... (?)
    Electrical I can do, if my Smith & Larson WT-2 still works ... and I can find it :o:
    Audio would be more of a trick.
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    Nice! :thmbsup:

    Nice! :thmbsup:
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    Or match with a vertical array of say 3” to 4”...

    Or match with a vertical array of say 3” to 4” drivers... that could be fun :)
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    ... and play that 10" driver up pretty high...

    ... and play that 10" driver up pretty high (~3.5-5kHz) or risk blowing up the 2403 (90º horiz)... which is much, much higher than a 10" driver should be used regarding matching off-axis response at...
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    :thmbsup: Ken's a good guy. Hope it all comes...

    :thmbsup: Ken's a good guy. Hope it all comes together.
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    IF dead set on DIY, here's some old man ranting...

    IF dead set on DIY, here's some old man ranting for you:

    You may also need to open up the holes slightly on the diaphragm 'frame' and/or put a -slight- bevel/relief on the outside of the frame...
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    Another alternative in an adjacent/current...

    Another alternative in an adjacent/current thread:

    http://www.audioheritage.org/vbulletin/showthread.php?41755-Replacement-diaphragm-options-for-2425J&p=430265&viewfull=1#post430265
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    :thmbsup: Gotta love it when a plan comes...

    :thmbsup: Gotta love it when a plan comes together.
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    Having sat through a blind listening session in...

    Having sat through a blind listening session in Northridge, with the speaker swap mechanism (Proceed amps visible to the side),
    It was not an environment conducive to relaxed but thoughtful/critical...
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    scaled to 1024 wide... 86992

    scaled to 1024 wide...

    86992
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    EV maybe...

    EV maybe...
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    One thing I noticed watching this youtube video...

    One thing I noticed watching this youtube video (fast forwarded through most of it) was how it had a sense of sounding quite live and balanced ... in the living room approach.
    I've had that happen...
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    Foam looks pretty typical. The broken dia just...

    Foam looks pretty typical. The broken dia just looks original and busted. The other could be from a 2421 (Al) or 2425/6 (Ti).
    Good time to refresh the insides :)
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    :thmbsup:

    :thmbsup:
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    Can probably get at least two from that :)

    Can probably get at least two from that :)
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    I expect a gray one. If it remains resilient...

    I expect a gray one. If it remains resilient (possible but slim chance) and not compressed or gooey, why change it?

    If not, and they were mine, I would use felt or replace with foam... JBL used to...
  17. Thread: Headphones

    by grumpy
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    :rotfl:Did I do that? (spoken in your best Steve...

    :rotfl:Did I do that? (spoken in your best Steve Urkel voice imitation)
  18. Thread: Headphones

    by grumpy
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    193
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    107,954

    Pro/4AA ... My first real headphones. I'd wear...

    Pro/4AA ... My first real headphones. I'd wear those things until my head ached (took about an hour, maybe two if it was really good music).
    The liquid-filled ear pads eventually gave out. I don't...
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    Those turned out nice :)

    Those turned out nice :)
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    Very nice. The Tardis color looks pretty close to...

    Very nice. The Tardis color looks pretty close to stock for certain vintages of JBL :)
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    They were operating in 1955 (Ad in High Fidelity...

    They were operating in 1955 (Ad in High Fidelity mag):

    https://worldradiohistory.com/hd2/IDX-Audio/Archive-Audio-IDX/IDX/50s/Audio-1955-Jun-OCR-Page-0081.pdf

    Current tenant:

    86825
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    Glad you got it sorted! Factory mistakes have...

    Glad you got it sorted! Factory mistakes have happened.
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    Missed the AK storyline, so this may be old hat: ...

    Missed the AK storyline, so this may be old hat:

    Check the woofers? Perhaps a previous owner got them in backwards (push terminals vs sized tabs?)
    ... as it’s supposed to be wired out of phase...
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    Lots of options, for sure. :) Have to match...

    Lots of options, for sure. :)
    Have to match in/outs with equipment available.
    Working entirely in one manufacturer’s ecosystem makes it a bit easier, for sure.
  25. Not to worry... probably not as much as you might...

    Not to worry... probably not as much as you might think. A two channel 250w Class A amp would need heat sinks the size of a small car (Ok, maybe a bit less). Very likely Class A to a point, but not...
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