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  1. Thread: L 300 do-over

    by grumpy
    Replies
    18
    Views
    725

    Nice/clean crossover job & good inductor...

    Nice/clean crossover job & good inductor orientation.
  2. Replies
    1
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    172

    Guesses? It looks better than flat, structurally...

    Guesses? It looks better than flat, structurally follows the horn curvature, requires less toe-in, and since one is rolled off (slowly) starting at 150Hz, there’s less reason to aim them combined...
  3. As long as it has a centrifugal governor, should...

    As long as it has a centrifugal governor, should hold speed OK.
    The more I look at it, the more I like it :D

    Seems there was a DIY speaker system depicted here a few years ago with a similar...
  4. Replies
    9
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    521

    (re the smaller system) 85db sensitivity? pad...

    (re the smaller system)

    85db sensitivity? pad the horn to match the small(ish) woofer and cabinet... & more room for passive EQ, I suppose.

    Would be interesting to hear a Revel M106 in...
  5. Ha, I'd do it just to calm my brain. Once done,...

    Ha, I'd do it just to calm my brain. Once done, you can experiment. I'd try woofers to the inside first.
  6. Haha... from Lirpa Labs?

    Haha... from Lirpa Labs?
  7. Replies
    4
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    1,371

    So, 1) that question was 10 years ago. :D ...

    So, 1) that question was 10 years ago. :D
    2) The minimum impedance between peaks (as noted) for the woofer would likely be close to Re.
    Unlikely that there would be issues further...
  8. Replies
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    11,571

    Looking good Rob! :lurk:

    Looking good Rob!

    :lurk:
  9. Replies
    3
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    260

    The inputs are all line-level XLR, not speaker...

    The inputs are all line-level XLR, not speaker level. Kinda wonder how you ended up with this particular sub.

    It's intended to reside at the output of an L-C-R consumer or pro-level preamp device...
  10. Thread: L 300 do-over

    by grumpy
    Replies
    18
    Views
    725

    Them’s purdy! (nice work)

    Them’s purdy!

    (nice work)
  11. Thread: Bang for bux ?

    by grumpy
    Replies
    13
    Views
    648

    There is some crossover/EQ finesse required to...

    There is some crossover/EQ finesse required to get the best out of a 044Ti ... and the foam might be shot (same foam issue with an unmaintained 044).

    I wouldn't personally recommend just dropping...
  12. Replies
    8
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    614

    Two or three-way wasn't really my point, but I...

    Two or three-way wasn't really my point, but I look forward to seeing your progress :)
  13. Replies
    35
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    15,848

    Certainly fun to sample various technologies and...

    Certainly fun to sample various technologies and equipment periods! Some stick, some less so.

    Nice collection, as always :)
  14. Replies
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    614

    Nice looking horn. Without anything more than...

    Nice looking horn.

    Without anything more than a TS 2226H model to work from... it might be fun to consider an internal volume of 5ft3 + fiberglass with two 4" ports ranging from 4" to 7",...
  15. Wanna hear my wild ass guess? Someone reused a...

    Wanna hear my wild ass guess? Someone reused a cone/voicecoil/spider assembly (the latter looking a bit torn up in one of the pics), then refoamed it.
    Would explain a worn/sloppy suspension (low...
  16. Thread: Harkness C-40

    by grumpy
    Replies
    12
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    925

    I'd be over there, checking them out... they're...

    I'd be over there, checking them out... they're big and old, but if in good shape that's still quite a find.
  17. Replies
    94
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    12,352

    For anyone trying to follow this thread: if a...

    For anyone trying to follow this thread: if a 2225 has its soft parts replaced with a JBL factory 2235H recone kit, it is no longer a 2225, but a proper 2235, unless the mass ring is left out, in...
  18. Replies
    2
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    769

    Unless it has a universal switching supply (AC to...

    Unless it has a universal switching supply (AC to DC) on the other side of that IEC type connector, I'd hesitate to give it the thumbs up. Safer would be a big transformer to drop the voltage (and...
  19. Replies
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    7,192

    Perhaps do a google search on "Zilch Econowave"...

    Perhaps do a google search on "Zilch Econowave" and see what happens :)
  20. Pretty sure something similar could indeed be...

    Pretty sure something similar could indeed be done with a BSS (I believe there's an example of a signal-level based 'loudness' function that does much of that). Trick would be the subharmonic...
  21. Replies
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    935

    Was easier to do finger damage with the original...

    Was easier to do finger damage with the original aluminum dustcaps... which it seems are no longer a feature of the recone kits. :dont-know:
  22. Replies
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    2,913

    https://www.parts-express.com/jbl-sub1500-15-subwo...

    https://www.parts-express.com/jbl-sub1500-15-subwoofer-4-ohm--299-750

    (so, not the same)
  23. Replies
    11
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    710

    I believe that's it. The topic of coupling or...

    I believe that's it. The topic of coupling or uncoupling drivers gets very quickly to: What problem are you attempting to solve?
    You want a good seal. You don't want loose bits vibrating (buzzing),...
  24. Replies
    14
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    1,975

    four minutes + you'll want back: ...

    four minutes + you'll want back:

    https://www.youtube.com/watch?v=tm8FwzHUGCs
  25. Replies
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    1,975

    Hmm... ...

    Hmm...

    https://radianaudio.com/collections/hf-neo/products/951-4-diaphragm-1-4-exit-compression-driver
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