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  1. Replies
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    As is often the case with diy they were...

    As is often the case with diy they were experimentally adjusted. The best information I have is:

    GT: 80, 750 or 800, and 10k

    W's. GMO's: 60, 650 to 950, 10-12k.
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    The 1200fe is not a midcone; it's a woofer; using...

    The 1200fe is not a midcone; it's a woofer; using it enables a lower low entry frequency. I'm guessing the point of his diy experiment was to hear what that would sound like; that would be mine.
    ...
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    Oh, yes. I remember now listening to those...

    Oh, yes. I remember now listening to those towering MTM's. The consensus was we didn't like it; as I remember it had a big hunk in the upper bass. After we reported back to the forum people began...
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    I wouldn't be surprised if there are a number of...

    I wouldn't be surprised if there are a number of potentially interesting and exciting developments now abandoned at jBL under the present regime of axing away R and D, down selling brand names,...
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    He didn't explain (in my hearing), but I believe...

    He didn't explain (in my hearing), but I believe the answer would be in the literature around the introduction of the 4430 and 4435 monitors. For the Project May we had been given four woofers and...
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    And, come to think of it, Widget's Grand Master...

    And, come to think of it, Widget's Grand Master Ones, which may have been precedent.

    GT's diy: 1500AL sub, 1200fe, horn plus supertweeter.
    Widget's GMO's: sub1500, TAD 1102, horn plus...
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    And, come to think of it, Widget's Grand Master...

    And, come to think of it, Widget's Grand Master Ones, which may have been precedent.

    GT's diy: 1500AL sub, 1200fe, horn plus supertweeter.
    Widget's GMO's: sub1500, TAD 1102, horn plus...
  8. Replies
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    Augmented 12" two-way: GT's diy.

    Augmented 12" two-way: GT's diy.
  9. Replies
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    Augmented 12" two-way: GT's diy.

    Augmented 12" two-way: GT's diy.
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    I agree that may feel like a small space, so the...

    I agree that may feel like a small space, so the bass should be carefully managed. I would try to avoid a prominent knee. As GT said in the context of designing speaker systems for the Japanese...
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    JBL's need in the late fifties and into the...

    JBL's need in the late fifties and into the sixties when the LE10 and LE14 came on line was for speakers with good bass in smaller cabinets to meet the sometimes conflicting needs of two-speaker...
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    There's also there option of giving the LE14A...

    There's also there option of giving the LE14A some more room to work lower.
  13. Replies
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    When laying a big heavy speaker like that on its...

    When laying a big heavy speaker like that on its back I place a paperback book under the top edge, so that when it comes time to right it I can get my fingers under it. Salmon Rushdie's Midnight's...
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    Come to think of it, I have to take this back. ...

    Come to think of it, I have to take this back. They came to me double boxed in one box, but I decided it was too much of a box. I shipped them in individual double boxes. I did get the note,...
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    Belts and suspenders: No manufacturer uses...

    Belts and suspenders:

    No manufacturer uses plywood as far as I know. They ship a lot of speakers; the numbers and experience tell them what's necessary.

    Your method of fitting plywood...
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    I just remembered. Some people use expanding...

    I just remembered. Some people use expanding foam in a plastic bag that shapes itself around the woofer in the box. Then cover the cone with stout cardboard. Easy peasy. I went looking for the...
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    I don't put the woofers face to face. I don't...

    I don't put the woofers face to face. I don't pack for Armageddon, just some jouncing, being tossed and dropped.

    I understand the question, but with the inner boxes packed as I described I don't...
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    Because it takes up space and adds weight and...

    Because it takes up space and adds weight and provides no cushioning, I don't use plywood except for protecting cones that are irreplaceable, and not always then. If you want to use plywood, 3/4" is...
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    Just put them on eBay.

    Just put them on eBay.
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    I'm still wondering.

    I'm still wondering.
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    The L66 crosses over at 3000, maybe closer to the...

    The L66 crosses over at 3000, maybe closer to the LE20-1 comfort zone, but if you have the L88 without the upgrade kit, you may have a point there.

    It might be interesting to put a new, better,...
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    I'm wondering why the described sound problem is...

    I'm wondering why the described sound problem is attributed to the woofer and not the tweeter.
  23. Replies
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    Wow! Good pickup! The C37 is listed in the 57...

    Wow! Good pickup! The C37 is listed in the 57 catalogue chart with the 050 load, though pictured and not named. It does indeed seem to be a factory cab or a good copy. JBL sold plans for their...
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    That spec is also in the pro enclosure guide for...

    That spec is also in the pro enclosure guide for 2118 and 2123.
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    If you have some clean 2205's, that is, not wrung...

    If you have some clean 2205's, that is, not wrung out and preferably having lived in a domestic environment, AND they have the original cones, I agree completely with your being reluctant to recone...
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