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  1. Thanks. This was my first experience with folded...

    Thanks. This was my first experience with folded horn bass speakers. I am impressed. The efficiency boost at the low end is such that it's actually matching that of the compression driver / horn...
  2. I'm not sure. When I got them, they did have the...

    I'm not sure. When I got them, they did have the grill and the mounts for the mids in the horn opening but no drivers. The guy had a massive 2350 horn on a 375 just sitting on top of the cabinet. The...
  3. LOL, sad, but true. I'm at the tinker, tweak,...

    LOL, sad, but true. I'm at the tinker, tweak, tune and listen stage. I think the first thing I want to do is get all the diaphragms to 8 ohms. That was the original plan, I'm not sure how I skipped...
  4. I will post some pictures shortly. I'll...

    I will post some pictures shortly. I'll experiment with 12" spacing too. I think I'm just being lazy since they are so heavy.

    Something else I noticed, and I really should start another thread for...
  5. Wellll, never mind! I got off my lazy butt and...

    Wellll, never mind! I got off my lazy butt and moved them up against the wall and it sounded like I added a subwoofer. 6" away from the wall, the rest of the area sort of a mess of furniture but it...
  6. Question regarding rear ported JBL speakers

    I have 2 pairs of custom build cabinets from the 60's / 70's. One is the model C34 (folded horn) and the other is about the same size but has rear ports after passing by several interior mounted...
  7. I'm a little late to this conversation. I was...

    I'm a little late to this conversation. I was under the impression that the type of autoformers JBL used in their crossovers were single winding autoformers. A continuous winding with the taps...
  8. More good news! I'll take a feeler gauge to the...

    More good news! I'll take a feeler gauge to the gap. Any idea what it should be for the modern coils to fit? Looking at the old coil from the D130, it is aluminum.
  9. Thanks Dave, (Just put a cushion between the...

    Thanks Dave,

    (Just put a cushion between the magnets! Good advice). The depth of the frames is the same on both. You may have found the difference, extended range vs woofer, Copper VC vs alum. VC....
  10. I spent some time comparing the frames. There are...

    I spent some time comparing the frames. There are just about identical aside from a few casting marks. You mentioned wire material. Other than the leads from the terminals to the voice coils, I don't...
  11. Difference between the D130 and the D130A, OLD STYLE?

    I have one of each. D130 had an aluminum dust cap (I'm not sure if it was original). Both 16 ohm. both need re-cones.
    What was the difference between the 2 models?



    D130, 16 ohm (Single) (Old...
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    Darn. Can't blame me for trying to take the easy...

    Darn. Can't blame me for trying to take the easy way!
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    Thanks, I'll keep an eye out for the 5070 or...

    Thanks,

    I'll keep an eye out for the 5070 or 5080 or really any probe that is .038" or less. That's a big help just having that measurement as a starting point.
    I've been so tempted to just file...
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    Is the probe for the FW Bell 5070 thin enough to...

    Is the probe for the FW Bell 5070 thin enough to fit most voice coil gaps? That was the issue I had looking for gauss meters. Finding one that fit voice coil gaps. Most are too thick.
    Will the 5070...
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    Flodstroem, that is incredibly cool! About a...

    Flodstroem, that is incredibly cool! About a year ago I posted questions about building a unit like yours. No one responded. Would you shave the schematic and construction details? I'd love to build...
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    I think I'll need to ask the power of the machine...

    I think I'll need to ask the power of the machine used.
    What is the proper arrangement for a driver in a remagnetizer? I'll ask him about that as well.

    Thanks,

    Eric
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    Thanks. Yes, both were done and both were...

    Thanks.

    Yes, both were done and both were taken apart, thus the need for regaussing.
    It sounds like it's either the test tool or the remag machine that is lacking in strength.

    These were sold...
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    What sort of issues could be with the LE85?...

    What sort of issues could be with the LE85? Magnet and housing showed no damage or cracks? What else could be wrong with the LE85?

    Thanks,
    Eric
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    It was Speaker Repair Pros, they have Orange...

    It was Speaker Repair Pros, they have Orange Country's old magnetizer. I have no idea the tool he tested with, he gave me the brand a while back, but I have since forgot.
    If you do not have 3000 Oe,...
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    This may be better in a separate post, but...

    This may be better in a separate post, but thought I'd start here as most of you are knowledgeable about magnetism. I had a pair of LE85,s I sent in to be remagnetised. They measured below 5000 gauss...
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    Thanks. Yes, library once things settle down...

    Thanks. Yes, library once things settle down around here. Are libraries even open during this Corona Virus lock down?
    I looked up the book on e-Bay and Amazon. It must be a good one, its about $140!...
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    Well, sorry I asked! (No, thanks for the...

    Well, sorry I asked! (No, thanks for the response). That was more complicated than I had hoped. WhichThiel parameter is being graphed (or is it all that have the same rapid change at the same point)?...
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    Thanks, . I think I'll jump into it and see...

    Thanks,
    .
    I think I'll jump into it and see what I come up with. I'll post up with questions as I go.


    Eric M.
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    Thankyou. Edgewound, could I get you to take a...

    Thankyou.

    Edgewound, could I get you to take a look at the post? Your name came up as a good source for the answer.
    ...
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    Thanks, that about sums it up! One question....

    Thanks, that about sums it up!

    One question. In this sentence from the link, I understand all but the reference the "knee". Would you know what that is? Could it be the bottom of the gap?
    ...
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