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  1. Replies
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    before 1976 64886 :blink: HP25C from 1976 :...

    before 1976 64886 :blink:

    HP25C from 1976 : the first "non volatile memory" with cmos technology. My parents were ruined to provide me my first calculator for my engineer studies :applaud:
    ...
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    and never forget that TS linear lumped parameters...

    and never forget that TS linear lumped parameters describe the vibration and transfer behavior of a transducer in the small signal domain and at frequencies where the size of the transducer is small...
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    the effort went probably into the driver design...

    the effort went probably into the driver design (cone profil, aquaplas, ...) allowing for the 123a the "wide open" sounding with respect to the LE5-2 low cutoff frequency at -6dB/oct. ...

    X-over...
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    some litterature ...

    some litterature

    http://diyaudioprojects.com/Technical/Papers/Loudspeakers-in-Vented-Boxes-Part-I.pdf
    http://diyaudioprojects.com/Technical/Papers/Loudspeakers-in-Vented-Boxes-Part-II.pdf
    ...
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    http://www.jblproservice.com/pdf/thiele%20small%20...

    http://www.jblproservice.com/pdf/thiele%20small%20parameters/theile%20parameters.pdf

    look at 123A, 2213 (123A-3 like) TS parameters plus some experiments there ;)
    ...
  6. Thanks for ;) Actually :yes: from an Iphone but...

    Thanks for ;)
    Actually :yes: from an Iphone but it's ok now from my PC :dont-know:


    :happyh:
  7. Me too...:crying:

    Me too...:crying:
  8. Thanks for sharing and nice to know! Some pics...

    Thanks for sharing and nice to know!

    Some pics of the stuff?
  9. Thread: Jbl sa600

    by ratitifb
    Replies
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    5,843

    :no: regarding the manual extract and as grumpy...

    :no: regarding the manual extract and as grumpy said the 2 connectors with cables are the L and R connexions the signal go through from preamp to power amp
    :yes: for that you have to remove the 2...
  10. Replies
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    Ideally the 4343 frequency response has been...

    Ideally the 4343 frequency response has been optimized in flush mounted environment to minimize diffractions and to eliminate back wall reflection ... easy to tell :blah: but not so easy to...
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    Auratones are lovely nearfield "cubes" to work...

    Auratones are lovely nearfield "cubes" to work with but you have to have the capacity to imagine the basses!
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    Don't forget Rice and Kellogg without whom JBL...

    Don't forget Rice and Kellogg without whom JBL (and others...) would not be what he is ;)
  13. Replies
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    :no_wag: From my feeling this topic isn't a...

    :no_wag:

    From my feeling this topic isn't a "technical" one but it has to be mainly supplied by every pic we can find here and there :dont-know:

    By the way any technical comment regarding pics...
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    if i well remember what i have read Serge...

    if i well remember what i have read Serge Gainsbourg had its own JBL at home (4333 or L300? don´t remember...)
    ;)
  15. Replies
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    Ma petite quéquette sort de ma braguette. Je...

    Ma petite quéquette sort de ma braguette. Je pisse et je pète en montant chez Kate. Moralité: eau et gaz à tous les étages... :cheers:
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    recently passed away BOBBY WOMACK with KEITH and RONNIE

    we can see at the bottom right the JBL112 :coolness:

    63653
    thx fabrice11 for pic
  17. Replies
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    why don't try to gently heat the goop with a heat...

    why don't try to gently heat the goop with a heat gun in order to allow the excess of goop to leave partially the cone by gravity (you can help it for by rubbing it with your finger...) and to return...
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    when you hear the flapping noise what signal do...

    when you hear the flapping noise what signal do you supply to the speaker ?

    From my experience i heard flapping noise on fresh reconed 2235 while i was applying a 30Hz pure tone. The fact has...
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    fortunately it seems that some alu domes can be...

    fortunately it seems that some alu domes can be seen from that pic :yes:
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    the L102 2.6mH coil in the LF section ;) ...

    the L102 2.6mH coil in the LF section ;)

    http://www.audiokarma.org/forums/showthread.php?t=537606
  21. Thread: Box for 2213H

    by ratitifb
    Replies
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    1,967

    Generally speaking the box is tuned according to...

    Generally speaking the box is tuned according to the speaker we have got, not the reverse :rolleyes:

    ... but you can sim by WinISD and play with ;)

    http://www.linearteam.dk/
    ...
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    ... but They come with a 14 day guarantee...

    ... but

    They come with a 14 day guarantee :eek:.
    I combine shipping to save you money :bouncy:.

    :D
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    nice to hear you again :bouncy:

    nice to hear you again :bouncy:
  24. Replies
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    :no_wag: bypass capacitor only improves the...

    :no_wag: bypass capacitor only improves the capacitor behavior to the high frequency

    For me, in theory and if we are considering a constant real impedance of the driver ..., it's also a 1st order...
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    what impedance (complex and frequency dependant)...

    what impedance (complex and frequency dependant) did you use for your calculation ? "Simple theory" is one thing when electroacoustics reality and listening tests are another...

    In addition and...
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