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  1. Hi Sguttag, Addendum Looks like JBL pulled...

    Hi Sguttag,

    Addendum

    Looks like JBL pulled out of retirement its front loaded horns for a new theater application.

    Didn't know nor ever saw the 1986 46 series Theater system models you...
  2. 880718807288073

    880718807288073
  3. Hi Sguttag, RE I believe there was a period...

    Hi Sguttag,

    RE I believe there was a period where JBL was using the 2226 (definitely the 2225) in the 4550BKA and 4560BKA cabinets.

    Thanks for the input. Up to this day i've never seen the 2225...
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    Hi soulman, RE "I think i would prefer the one...

    Hi soulman,

    RE "I think i would prefer the one 15" woofer models cause i need to have some spares in case of failure!"

    Except for K145 & K151 plans, i think an 8 cu.ft. box is too large for the...
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    Hi Soulman, As promised attached you'll find...

    Hi Soulman,

    As promised attached you'll find four other 8 cu.ft. cab drawings from JBL (1979).

    I noted a typo on two of those plans.

    First, on drawing for K 151 height is shown as 34", but...
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    Hi Soulman, The plans that you show are pretty...

    Hi Soulman,

    The plans that you show are pretty old, i'd say around 1975, based on the drivers mentioned. The latest such plans JBL published as far as i know was in 1979, with some more recent...
  7. Hi Marten, RE: "(2226/2227) I am working on a...

    Hi Marten,

    RE: "(2226/2227) I am working on a front loaded horn."

    I never saw the 2226 being specified by JBL for horn loading. Drivers suitable for horn are usually identified and/or used as...
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    Hi Soulman, RE: "I believe the problem with...

    Hi Soulman,

    RE: "I believe the problem with these cabinets is the large distance between the horn and the woofer."

    I have something else which may be relevant to your sound problem.

    From...
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    925

    Hi retro soulman, RE "The problem is that any...

    Hi retro soulman,

    RE "The problem is that any crossover point upper the 500hz make the speaker system to not sound correct. At 800hz the blend of the mid frequencies with the lows is not good and...
  10. Replies
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    Temporary crossover board for testing ...

    Temporary crossover board for testing

    Crossover simulation done years ago on a leftover piece of 3/4" plywood. The exact one used to try various resistor values to reduce tweeter output and power...
  11. Replies
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    104,606

    Sound Level Meters used for db reduction...

    Sound Level Meters used for db reduction assessment

    Left: In the old days if you didn't have deep pockets for B&K equipment, this Radio Shack analog Sound Level Meter was the one used by many...
  12. Replies
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    104,606

    Some additional Lpad notes The Lpad tables...

    Some additional Lpad notes

    The Lpad tables I've seen all appear to assume the speaker is a resistive load. There are many fixed Lpad tables on the Net, but prefer using those from known sources...
  13. Replies
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    104,606

    The calculations/examples page for driver db...

    The calculations/examples page for driver db reduction using a series resistor

    From Weems, Useful Formulas, Ohm's Law for Speakers

    " E = I X Z; I = E/Z; Z = E/I; E voltage in volts; I...
  14. Replies
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    New Year contribution to the community. And Best...

    New Year contribution to the community. And Best Wishes to all for 2021! Lets hope its a better one...

    Posting in my thread this reply to LPAD subject posted elsewhere, since this is late, plus...
  15. Thread: What's Playing Now

    by RMC
    Replies
    10,632
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    3,304,352

    Wolf, You mean an old friend like this Liberty...

    Wolf,

    You mean an old friend like this Liberty Records/Soul City Motown 1969 antique? It has a lot of mileage but acceptable condition for its age...

    87888


    "... the outstanding 8 track...
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    1,183

    Poll: Better not to say, sort of "classified data". If...

    Better not to say, sort of "classified data". If she really knew she'd drag me to Psychiatrist's office! No say means no problema...
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    Eaulive, RE "this is why I think that...

    Eaulive,

    RE "this is why I think that something in the box makes it appear larger."

    You need a fair amount of damping material in a box to make it appear larger (virtual volume) and my guess is...
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    Hi Eaulive and Grumpy, RE "I have a port...

    Hi Eaulive and Grumpy,

    RE "I have a port length of 10.4" and you get 9.2"."

    Linear team, the makers of Win ISD, issued an interesting paper some years ago, which i have somewhere, about the...
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    Hi Earl, RE Post # 4 I think the following...

    Hi Earl,

    RE Post # 4

    I think the following pics might give you some additional "ammunition" to convince the OP. Regards,

    Richard

    8783787838
  20. Replies
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    Steve, RE This is off topic but do you have...

    Steve,

    RE This is off topic but do you have TS data for the 2205H? (post #52)

    First pic is a copy, with TS parameters, of a 2205 computer printout given to me in 1980 by JBL's Canadian...
  21. Replies
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    3,528

    Steve, RE Does the "Plasiflex" cone basically...

    Steve,

    RE Does the "Plasiflex" cone basically look like plastic? (post #51)

    Hard to say if its plastic or a coating applied to the woofer for damping/rigidity? Its relatively stiff cone though....
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    Steve, RE "Some companies use plastic cone...

    Steve,

    RE "Some companies use plastic cone mid-range/mid-bass drivers but to me they don’t sound articulated (lacking in upper mid-range transients)."

    Most of the woofers on-hand are paper...
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    Hi Steve, No horns, except for some horn...

    Hi Steve,

    No horns, except for some horn tweeters on the sound reinforcement boxes

    XO frequency to the satellites typically around 250-300hz

    Satellite boxes often house a 5 1/4" plus a dome...
  24. Thread: Headphones

    by RMC
    Replies
    199
    Views
    134,398

    Hi aware Wolf, Sometime no sea. So...

    Hi aware Wolf,

    Sometime no sea.

    So sheltering in place has brought the wolf to a new level, the meditating wolf now? New adventure? Though might not be as nice as your Bra type phones...
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    Hi Steve, RE "Have you designed any passive...

    Hi Steve,

    RE "Have you designed any passive full range systems with extended bass?" (post # 27)

    I design my own boxes and have never cloned other people's or manufacturer's design.

    I do...
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