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  1. Replies
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    "Maximally flat" curve is usually the one that...

    "Maximally flat" curve is usually the one that encompasses the largest number of observations (frequencies) on a straight line. Not necessarily flat all the way. For example, as i recall, in Win ISD...
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    I didn't do your homework, i did mine. First, i...

    I didn't do your homework, i did mine. First, i needed to convince myself that this system could be worthwhile in view of Unibox confusing dash board info. Second, you indicated "... an optimizer...
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    Chew on the following pics for now and I'll be...

    Chew on the following pics for now and I'll be back tomorrow with explanations. I didn't use all the driver parameters to go faster just those required for box response modeling and power.

    Same...
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    I'll be back later with some answers for you....

    I'll be back later with some answers for you. Unfortunately Unibox isn't one of the easier softwares to use.

    You should try Win ISD or Winspeakerz which are much more easier to use and come with...
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    THE STEVENSON PHONO CARTRIDGE PROTRACTOR Among...

    THE STEVENSON PHONO CARTRIDGE PROTRACTOR

    Among the bunch of phono cartridge alignment protractors on-hand, have mainly used the AT that came with the AT LP5 turntable with some correction to it...
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    I mentioned a number of posts back, that Shure's...

    I mentioned a number of posts back, that Shure's long discontinued M95ED phono cartridge, and its later reissue in the Encore series as the ME95ED (with a more modern design), was for some time...
  7. Thread: JBL design patents

    by RMC
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    JBL's recent port (Slipstream). The name is...

    JBL's recent port (Slipstream).

    The name is trade marked and the design is patented based on JBL info shown.

    There must be some untold story here than just flared ends, since double-flared...
  8. Thread: JBL design patents

    by RMC
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    I think i saw the new vent referred to, called...

    I think i saw the new vent referred to, called SlipStream?, is a patended design. Pretty sure about this...

    Richard
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    Hi Widget, Thanks for the insight. ...

    Hi Widget,

    Thanks for the insight.

    Fiberglass i have bundles from replacing the house insulation in the attic (10" thick there, yup cold Canada).

    I also like the soft open cell egg-crate...
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    Hi rusty, Yes i do see the contour of the...

    Hi rusty,

    Yes i do see the contour of the recessed hole.

    Clever way to recess the driver in order to fit the MA15 kit on the 145.

    Looked at the Urei factory data i have and saw no mention...
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    I remembered seeing something in my JBL papers...

    I remembered seeing something in my JBL papers regarding E-145 mounting. Well, not the "nirvana" i might have hoped for, but pretty much confirms what Grumpy wrote.

    Richard

    89891
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    Giuseppe, RE "sound-absorbing material; they...

    Giuseppe,

    RE "sound-absorbing material; they recommend the 3 cm high ashlar polyurethane foam, what do you think?"

    I looked at a few web sites to see what your foam is, saw an italian and a...
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    For home use go for a reflex cabinet. There is...

    For home use go for a reflex cabinet.

    There is no deep bass in a 4530 cabinet, only some response amplitude in the 50 to 80 hz or so range. Plus its simpler to build a vented box.

    Richard
  14. Hi Mazza, RE Post # 22 (2402), Can anyone...

    Hi Mazza,

    RE Post # 22 (2402), Can anyone advise what systems these were used in please? I searched the web but couldn't find much info on them.

    I've seen a number in my JBL documents, but too...
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    Hi Amon, What distinguish control monitors is...

    Hi Amon,

    What distinguish control monitors is often their "doctored" response for flatness across the range and the coverage pattern control. The planned box on top of 4645 won't be a homogeneous...
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    Hi Dave, Thanks for the comment, i appreciate....

    Hi Dave,

    Thanks for the comment, i appreciate. Food for thought, certainly.

    The only place where i more or less agree is the "Particularly for newer members". Personnaly i'd be surprised if say...
  17. RE "IMO the 2214 woofers have a problem making...

    RE "IMO the 2214 woofers have a problem making the connect with the horns." (mentioned in two posts)

    A short tentative explanation.

    The theoretical upper limit for a 12" is 1.2 khz. (David...
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    INTERESTING INFO REGARDING JBL CONE DRIVERS...

    INTERESTING INFO REGARDING JBL CONE DRIVERS HAVING FOAM INSIDE...

    Came across this info from an authentic JBL document in my stuff.

    The problem with such foam is that it disintegrates with time...
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    Jon, Regardless of whom inspired the speakers...

    Jon,

    Regardless of whom inspired the speakers there's a preferred way to do things and a less desirable one.

    RE she does not like how the driver looks when its mounted from the front.

    Well,...
  20. Based on precaution principle regarding foaming...

    Based on precaution principle regarding foaming and gap (a legitimate concern) you might be better looking for something else. Can't win them all...
  21. Hi Mazza, RE "Any and all help appreciated." ...

    Hi Mazza,

    RE "Any and all help appreciated."

    To bond metals in general i've had good results using the glue on pic. But you must do as indicated, like a clean parts surface, etc.

    The...
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    Jon, I've just sent to your Gmail account an...

    Jon,

    I've just sent to your Gmail account an Altec document which i think gives the driver related dimensions you're looking for.

    RE "I should attach a piece of wood 1x3 horizontally right...
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    Jon, First a bit of history for better...

    Jon,

    First a bit of history for better understanding about port tuning. In the old days (60's- early 70's) Altec and others tuned their ports based on a woofer's free air resonance (then called...
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    I sent you the 612 plans 2 minutes ago. I will...

    I sent you the 612 plans 2 minutes ago.

    I will answer your other questions in your last post later tonight since i'm busy right now.

    Richard
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    Hi Woofer, Thanks for asking the question, the...

    Hi Woofer,

    Thanks for asking the question, the reply prompted me to suggest this simple fix. Sometimes we're too close to the tree and don't see the forest behind anymore.

    Btw wife happened to...
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