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  1. Replies
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    Nice. Given the bouncy ball in pic one, you might...

    Nice. Given the bouncy ball in pic one, you might want to attempt to protect those grilles and sharp corners...
    As clean as those are, little accumulated bits of unfortunate damage could pull down...
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    Keeping in mind my handle here is 'grumpy'... ...

    Keeping in mind my handle here is 'grumpy'...

    I would think other questions to ponder (particularly this being your first post, asking for a notional appraisal) might be: are you (and perhaps...
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    I would suggest leaving the inductors alone, in...

    I would suggest leaving the inductors alone, in general. Many networks are dependent on the resistance of a particular inductor to work properly (as intended). Also, they don't tend to deteriorate.
    ...
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    Maybe try this: ...

    Maybe try this:

    https://reconingspeakers.com/product/jbl-033-034-aftermarket-diaphragm/
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    Is there a way to get at the voicecoil (wire...

    Is there a way to get at the voicecoil (wire under the dome on a 1" short cylindrical former) without unwinding too much?
    Soldering the back to the wires still hanging on the mounting frame is going...
  6. Yes. But if you're using a passive crossover, it...

    Yes. But if you're using a passive crossover, it would need to be modified and levels possibly adjusted.
    With an electronic crossover/biamp system, it should be much less of an issue.
  7. Doh. I glossed over the J suffix. Sorry about...

    Doh. I glossed over the J suffix. Sorry about that.
    Wondered about the direct terminal connection... as both pictures looked identical.
    IIRC, the old screws and connecting wires work fine with...
  8. One potential vendor (no association): ...

    One potential vendor (no association):

    https://reconingspeakers.com/product/jbl-d8r2450sl-diaphragm/

    likely out of stock due to the sale price.

    Don't recall the difference (would think...
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    :banana:

    :banana:
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    Cool. Hope the web support equals the pro phone...

    Cool. Hope the web support equals the pro phone line and you get some useful suggestions! :)
  11. Replies
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    Agree with Rob, but why would JBL not have...

    Agree with Rob, but why would JBL not have real-world experience ... in setting up studios for critical listening (for example)?
    It's OK to use customer service also ... this is current equipment...
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    Have you tried talking to JBL directly?

    Have you tried talking to JBL directly?
  13. Thread: LE5-12 Polarity

    by grumpy
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    386

    ... and no, it will not harm the driver to try,...

    ... and no, it will not harm the driver to try, but it is by design:

    87656
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    The dome under the flashed aluminum (or aluminum...

    The dome under the flashed aluminum (or aluminum paint) is thin, but hard phenolic. If the dents didn't recover right away, the underlying material has been compromised (fibers broken). They can be...
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    Sure looking nice! :thmbsup:

    Sure looking nice! :thmbsup:
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    1) might want to pay attention to the DC...

    1) might want to pay attention to the DC resistance of the inductors (e.g. 1.1 ohms vs .36 for an ERSE iron core also at Parts Express).
    For some crossovers, this makes a significant...
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    Ah. Perhaps there were two completely separate...

    Ah. Perhaps there were two completely separate Altec system 15 lines, if so, “my bad.”

    The one I was referring to is a -not- an instrument cabinet and it would be entirely inappropriate to use as...
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    Apples and Oranges. Youll likely blow the...

    Apples and Oranges.

    Youll likely blow the woofer (not an instrument driver), and a fairly expensive compression driver.
    I get wanting a smaller bass cab. This is 75lbs though and a studio...
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    Mechanical or distortion-based Xmax?... They're...

    Mechanical or distortion-based Xmax?... They're often not the same.
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    There was a 1200GTi kit on ebay last night......

    There was a 1200GTi kit on ebay last night... still there, perhaps.
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    4.7 and 2.2 are standard values though ;) (if you...

    4.7 and 2.2 are standard values though ;) (if you -wanted- 1.5) ... 1.8 and 2.2 would get you 1.0
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    You might want to have a look at this thread:...

    You might want to have a look at this thread: http://www.audioheritage.org/vbulletin/showthread.php?2226-Voltage-Drive-of-5235-Card

    Shotgunning in parts might be fun, but is a crap shoot. In...
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    I was going to say the same thing about clipping,...

    I was going to say the same thing about clipping, but it's not always obvious... and there's always temptation.

    If you can solder and perhaps mount these where you can see you're beating up your...
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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...
  25. Thread: Jbl 4349

    by grumpy
    Replies
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    3,989

    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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