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  1. 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...
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    (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...
  3. 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.
  4. Haha... from Lirpa Labs?

    Haha... from Lirpa Labs?
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    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...
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    Looking good Rob! :lurk:

    Looking good Rob!

    :lurk:
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    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...
  8. Thread: L 300 do-over

    by grumpy
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    420

    Them’s purdy! (nice work)

    Them’s purdy!

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

    by grumpy
    Replies
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    574

    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...
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    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 :)
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    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 :)
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    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",...
  13. 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...
  14. Thread: Harkness C-40

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

    Perhaps do a google search on "Zilch Econowave" and see what happens :)
  18. 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...
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    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:
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    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)
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    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),...
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    four minutes + you'll want back: ...

    four minutes + you'll want back:

    https://www.youtube.com/watch?v=tm8FwzHUGCs
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    Hmm... ...

    Hmm...

    https://radianaudio.com/collections/hf-neo/products/951-4-diaphragm-1-4-exit-compression-driver
  24. Thread: 305P MkII

    by grumpy
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    Nice!... yeah deeper bass would probably just...

    Nice!... yeah deeper bass would probably just muddy the waters (so to speak) re monitor usage, and make for a much bigger box and/or amp.
    I was looking at the intermediate 306 version, but these...
  25. Thread: 305P MkII

    by grumpy
    Replies
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    1,647

    So yes, it breaks into the high 20s low 30s re...

    So yes, it breaks into the high 20s low 30s re usability.
    Drops like a rock below that (expected).
    (pink noise -> iPhone AudioTools LF-range FFT average)

    Could eke out a bit more bass in a...
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