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    Thanks! I always like to place inductors with...

    Thanks! I always like to place inductors with their magnetic fields orthogonal to each other to minimize any coupling and resulting mutual inductance.

    In this case, the 14 ga inductors were...
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    Good advice from Rob! I recently built a pair...

    Good advice from Rob!

    I recently built a pair of Nelson Pass L300 crossovers. I used 14ga Erse XQ air core inductors. They were not cheap. 16ga Erse EQ inductors are about half the price of the...
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    Tom, Wow, those really are beautiful. JBL...

    Tom,

    Wow, those really are beautiful. JBL really made some great cabinets back in the day. Of course back then everything from the drivers to the boxes were top notch.

    I've also installed new...
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    Tom, Unlike amps/receivers, etc. with active...

    Tom,

    Unlike amps/receivers, etc. with active electronics, capacitors in speaker crossover networks rarely fail catastrophically. They typically drift over time. How much and how fast the drift...
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    I haven't actually heard them. The gentleman I...

    I haven't actually heard them. The gentleman I built them for lives over 2000 miles away, but he is very pleased with how they turned out.
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    JBL L300 Nelson Pass Crossovers

    How handy are you? I recently built a pair of L300 crossovers based on the Nelson Pass design. It was a LOT more work than anticipated. The mechanical assembly and making the new wiring harnesses...
  7. I've used the Dayton Audio BPA-38G HD binding...

    I've used the Dayton Audio BPA-38G HD binding posts from Parts Express in the gold finish for a couple pair of vintage JBLs I've restored (L36 Decades and L19As):
    ...
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    Ackkkkk!!! I see my photos have been victimized...

    Ackkkkk!!! I see my photos have been victimized by the PhotoBucket extortion virus.

    So, here's a few more of my re-imagined L36 Decades using the same SpeakerWorks beige grill fabric and WOCA...
  9. I just refinished rebuilding the first 4301B ...

    I just refinished rebuilding the first 4301B crossover network. Here's what it looks like:

    https://s6.postimg.org/z99g06wrl/JBL_4301_B_Crossover_After.jpg

    As mentioned in my earlier post, I...
  10. Agreed, and in my reply above, I mentioned how...

    Agreed, and in my reply above, I mentioned how the placement of the inductors, especially in the stock 4301B crossovers is less than ideal.



    No hookup wire (or unwinding) needed in this case. ...
  11. True, but the placement of the inductors could be...

    True, but the placement of the inductors could be better. On the L19 crossover board the two inductors are physically parallel to each other. Simply rotating one of them by 90 degrees would reduce...
  12. BTW, here's why I am borrowing the inductors and...

    BTW, here's why I am borrowing the inductors and L-pads from the L19 crossovers to use in my 4301Bs.

    Original 4301B crossover showing obvious damage from improper storage (excessive heat and...
  13. Inductor Lead Length in Crossover Networks - Does it Matter?

    How critical is inductor lead length in a crossover network? I've only seen three pairs of JBL crossovers (L36 Decades, 4301B Control Monitors and L19s) in the flesh and all had what appeared to be...
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    Thanks. The camera is nothing special. It's a...

    Thanks.

    The camera is nothing special. It's a Nikon D3100, which was their entry level DSLR when I bought it at Costco about 5 years ago. It came with two small zoom lenses and a camera bag. ...
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    No dog house here and my girlfriend likes them. ...

    No dog house here and my girlfriend likes them. For now, they are at my place, but when we retire, downsize and move in together, these will be keepers. It was either that, or a yet-to-be restored...
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    Thanks for the "WOW!". It was a very fun,...

    Thanks for the "WOW!". It was a very fun, rewarding project.

    And aligning the script on the pots serves a useful purpose. It insures they are both in the neutral position when the knobs are set...
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    The inspiration for my change of direction were...

    The inspiration for my change of direction were Jan's gorgeous, custom built, one-of-a-kind L300s shown here.

    You can read more details on my process here.

    If there are any specific questions...
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    In addition to the externally visible...

    In addition to the externally visible improvements, I also rebuilt the crossovers and disassembled, cleaned and reassembled the L-pads:

    Crossover Before:
    ...
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    And, here's what they look like now: ...

    And, here's what they look like now:

    http://i1204.photobucket.com/albums/bb414/kerrythalmann/JBL_L36_Decade_After_1_zps8ds8zbgh.jpg
    ...
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    JBL L36 Decades Reimagined

    A couple months ago, I picked up a pair a pretty trashed L36 Decades. But, as they say in the home restoration business, they had good bones. They are my first pair of JBLs and I decided to make...
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    Thanks, the grill cloth is the same that Jan...

    Thanks, the grill cloth is the same that Jan purchased from speakerworks.com, right here in Eugene, OR. It's great stuff, easy to work with and for $11.95, I got enough for both grills, plus a spare...
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    Thanks to Jan's inspiration and much appreciated...

    Thanks to Jan's inspiration and much appreciated guidance, I finished the restoration of my JBL L36 Decades this morning; Here's a couple photos of how they turned out:
    ...
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