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  1. Replies
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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...
  4. Thread: L 300 do-over

    by grumpy
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    14
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    408

    Themís purdy! (nice work)

    Themís purdy!

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

    by grumpy
    Replies
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    549

    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",...
  9. 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...
  10. Thread: Harkness C-40

    by grumpy
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    12
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    778

    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 :)
  14. 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
  20. 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...
  21. Thread: 305P MkII

    by grumpy
    Replies
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    1,629

    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...
  22. Thread: 305P MkII

    by grumpy
    Replies
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    1,629

    Let me give it a more serious run through with...

    Let me give it a more serious run through with appropriate source material and get back.
    Itís caused a few surprising room rattles, but no real measurements yet.
  23. Thread: 305P MkII

    by grumpy
    Replies
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    1,629

    Caught a pair of the 8" version on crazy sale and...

    Caught a pair of the 8" version on crazy sale and free shipping at BHphoto with the sub (helps).
    (sale was -very- brief)

    Using as nearfields on stands driven by an old firewire MOTU Traveler...
  24. Other than adding a pair of terminals and...

    Other than adding a pair of terminals and clipping one connection (ok, two connections to prevent blue-smoke-type boo-boos), I'm not seeing this (passive bi-wiring 'mod') as being particularly...
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    Hey!... :D poopers gonna poop.

    Hey!... :D

    poopers gonna poop.
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