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  1. Replies
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    10,556

    I think the answers may lie between room gain and...

    I think the answers may lie between room gain and banana curve discussions.
  2. Replies
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    651

    Haven't directly compared, but I have heard the...

    Haven't directly compared, but I have heard the 1200Fe under a JBL vert horn. It was quite engaging...
  3. Thread: Sub18

    by grumpy
    Replies
    9
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    1,942

    I realize not everyone has suffered from the...

    I realize not everyone has suffered from the decades-long Sit-and-Sleep advert/commercial barrage...
    but “You’re killing me Barry!” :D
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    469

    Hi Todd, Karlson boxes look kind of cool and...

    Hi Todd,

    Karlson boxes look kind of cool and are fun to contemplate, and certainly have an effect.

    I'll speculate that at 30Hz to 300Hz a triangle cut out would be fairly equivalent... or a...
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    1,014

    Visual differentiaion? Horn a smidgen closer to...

    Visual differentiaion? Horn a smidgen closer to the top woofer? Worked -way- better than 180º around either other major axis.
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    1,770

    Perhaps a unit with training wheels (clipping...

    Perhaps a unit with training wheels (clipping indicators), or better yet, suggest going biamp so the bass amp (overdriven or not) can’t wreak havoc on the more sensitive drivers... use the integrated...
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    -very- loud bass -might- let you remain in the...

    -very- loud bass -might- let you remain in the room with 300w peaks, but it would be uncomfortable unless outside or in a very large room. So, I would not see 150w as a real-life L300 limitation....
  8. Thread: JBL Paragon

    by grumpy
    Replies
    1
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    815

    Condolences and congratulations. Perhaps a...

    Condolences and congratulations.

    Perhaps a Mcintosh 2x05 type amplifier and an accompanying pre would suit the mood/period (?)

    Modern gear is certainly suitable as well, but somehow wouldn't...
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    -opinion- Not where I'd personally go for a...

    -opinion-

    Not where I'd personally go for a daily listener (14" woofer crossing over to a small paper tweeter is bound to have its limitations),
    but they are old with fewer and fewer of them in...
  10. Replies
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    8,995

    "...but this voltage needs to be higher than any...

    "...but this voltage needs to be higher than any expected signal peak voltage."

    I challenge this repeated assumption. I suggest the bias voltage only needs to be sufficient to mitigate low level...
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    1,330

    If you just pick the correct two terminals on an...

    If you just pick the correct two terminals on an 8ohm L-pad, you'll have a variable resistor (low ohms to ~40ohms)
  12. Replies
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    9,747

    Xmax for 128H is only 1/3" ... 2" is right out. ...

    Xmax for 128H is only 1/3" ... 2" is right out.

    I would guess 1) simply expecting too much and over driving the system or 2) the box tuning (passive radiator in this case... seems there was a...
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    2,652

    If it's already tuned to be ~30Hz (say 5-6ft3...

    If it's already tuned to be ~30Hz (say 5-6ft3 vol, 4" long x 4" diameter port), I'd just start with it as-is (running through some scenarios).

    I would expect that to be fairly close to neutral (no...
  14. Replies
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    7,203

    Very nice. Inspirational, in fact. I -really-...

    Very nice. Inspirational, in fact.

    I -really- need to make working space in the garage and get going before George comes and kicks my butt!
  15. Poll: If the popping is happening with vinyl as a...

    If the popping is happening with vinyl as a source, use a high pass filter (whether its called a rumble filter or infrasonic filter)... the L150 is capable of enough LF energy to feedback through the...
  16. Replies
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    651

    More opinion: the 076 diaphragm is likely worth...

    More opinion: the 076 diaphragm is likely worth much more than the 044Ti (I am quite familiar with both drivers). Very much worth the trouble of trying to get what you paid for.
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    651

    Opinions: I'd wait to see what the seller says...

    Opinions:

    I'd wait to see what the seller says before doing anything.

    Other than the box, there's perhaps only a bit more value in the "new" Ti diaphragm than there would be for a very clean,...
  18. Replies
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    833

    The stock JBL shipping boxes for raw drivers have...

    The stock JBL shipping boxes for raw drivers have not been very impressive.
    Certainly better than throwing them in a milk crate, but cone protection and drop protection should be key.

    something...
  19. Thread: Original L100t

    by grumpy
    Replies
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    3,171

    nice condition! I like the plinth :)

    nice condition! I like the plinth :)
  20. Replies
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    9,747

    Manually-rotated 'lazy suzan' works OK for this...

    Manually-rotated 'lazy suzan' works OK for this kind of thing. A few bucks at a housewares store.
    Also useful for refurbishing speakers drivers in general.
  21. Thread: JBL 034 tweeter

    by grumpy
    Replies
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    7,413

    IIRC, there were links in the 044 rebuild...

    IIRC, there were links in the 044 rebuild discussion (Seawolf)
  22. Thread: JBL 034 tweeter

    by grumpy
    Replies
    16
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    7,413

    Handy info, if you work at a place that maintains...

    Handy info, if you work at a place that maintains large optical telecscope first-surface mirrors. :D

    Just paint the 034 lightly if cosmetics are a bother.
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    Nice. I stand by my suggestion as stated. First...

    Nice. I stand by my suggestion as stated.
    First time I heard those drivers, they were in a similar cabinet. Left a good long-term memory :)
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    Hmm. That's a lot of weight to cantilever out...

    Hmm. That's a lot of weight to cantilever out from a particle board face. Particularly long-term or in humid locations.
    Even something like "perforated hanging strap" or a side-to-side brace with a...
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    Would only add that if you go with plywood, I'd...

    Would only add that if you go with plywood, I'd suggest looking into a void-free type less likely to rattle or resonate, such as baltic birch or "appleply"
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