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  1. Replies
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    Not sure what you swapped and what the result...

    Not sure what you swapped and what the result was.
    If the problem follows the tweeter... perhaps one of the two internal diaphraghms has an issue (?)

    If the problems stays with the DIY M2, you...
  2. Thread: Jbl 4349

    by grumpy
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    605

    Appears to be a more home-friendly and...

    Appears to be a more home-friendly and JBL-geek-aesthetic "bookshelf" lil-bro M2 with passive crossover.
    Not sure who would review or what they would compare them to...
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    Bend, OR ... :duck: If it's not broken, there...

    Bend, OR ... :duck:

    If it's not broken, there may be a plate-glass, lowish oven temp solution.
    I tried it once (very poorly) and made a nice vinyl tostada shell. Didn't wait for it to cool long...
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    https://jblpro.com/en-US/site_elements/tech-note-j...

    https://jblpro.com/en-US/site_elements/tech-note-jbl-s-differential-drive-transducers

    and then pg 5 TS parameters:

    87278

    Yours is not the first such query re 2265 engineering data.
  5. I think the hint was the horizontal (front/back)...

    I think the hint was the horizontal (front/back) displacement of the woofer and horn phase centers on some models.
    Roughly a foot would be 1/2 wavelength at 500 Hz. Other factors could make this...
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    Nice series. Thanks for the link! I don't...

    Nice series. Thanks for the link!

    I don't recommend -starting- with the 3hr(!) calibration and equalization (C&E) video unless already familiar with the concepts that culminate to such a...
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    You are forgiven :D re foam pads:...

    You are forgiven :D


    re foam pads: http://www.audioheritage.org/vbulletin/showthread.php?41755-Replacement-diaphragm-options-for-2425J&p=430265&viewfull=1#post430265

    thread was re ferrite...
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    Groovecontrol - Do pull the crossovers and have a...

    Groovecontrol - Do pull the crossovers and have a look at how the stock terminals are attached (and available space behind) before buying new ones.

    IIRC, there are mounting screws behind the...
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    Hmm. Not remembering that. Without pulling one,...

    Hmm. Not remembering that. Without pulling one, that's all I can say. :)

    '4313' did some custom Aquaplas-ed 2235s -instead- of the mass ring.
    2214Nd-1 definitely has some around the periphery of...
  10. Replies
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    Mass rings, yes (35g?). Aquaplas? 2245 perhaps....

    Mass rings, yes (35g?). Aquaplas? 2245 perhaps. :) There was some discussion about using Aquaplas instead... but that was DIY... I think.

    Without the mass ring, it's a 2234 (if JBL or if the...
  11. Might search on Mile Nestorovic. I don't have...

    Might search on Mile Nestorovic.
    I don't have much more for you.
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    Guessing it was -not- John Hiatt. Watch for...

    Guessing it was -not- John Hiatt.

    Watch for dead skunks.
  13. Replies
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    Think it was the other way round... -added-...

    Think it was the other way round... -added- excess to Klipsch products (fancy veneer) at the start... and a good marketing sense. Long since evolved from there, particularly in the latter.

    It's an...
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    Maybe search on “altec 817” and “altec 511 horn”

    Maybe search on “altec 817” and “altec 511 horn”
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    87060 87061 87062

    87060
    87061
    87062
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    Hi Earl, it’s on the back. I think it would...

    Hi Earl, it’s on the back.

    I think it would be difficult to accomplish a truly equivalent DIY -1 version for several reasons.

    It’s on the back.
    There may already be goo (aeroflex 400?) where...
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    Used 13.5" as Diam (mid-surround) Note:...

    Used 13.5" as Diam (mid-surround)

    Note: Vas/BL/Mms 2216Nd (not -1) EDS shows 140L/18.9/135g. These and Cms are the squishy numbers that can be difficult to measure accurately and consistently. I...
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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.
  23. Replies
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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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