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  1. Replies
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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...
  13. Thread: Headphones

    by grumpy
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    107,452

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

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

    by grumpy
    Replies
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    107,452

    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.
  21. 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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    I believe it’s 48 or 96kHz, spdif or aes-ebu with...

    I believe it’s 48 or 96kHz, spdif or aes-ebu with the BLU Digital input card. Same out if your amp has a digital in, or BLU-LINK in ... then there’s the avb or dante versions for the BLU-80x series....
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    Yep... has to serve both functions. That said,...

    Yep... has to serve both functions.
    That said, once a satisfactory setting is found, they just become a maintenance issue.
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    A few general comments on the picture... Quite a...

    A few general comments on the picture...
    Quite a bit of airflow is needed. Easily underestimated. A 100w lightbulb in a closed box can start a fire.
    The path needs to be through the device being...
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    An L-pad is (normally) a three terminal device...

    An L-pad is (normally) a three terminal device that is functionally the same as the picture below where one terminal is the "+", one is the R1-R2 junction, and the other is the "-" ... the difference...
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