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  1. I believe that foam and cone material can change...

    I believe that foam and cone material can change with time, as well as magnet can loose its strength. But what will happen to

    1) Ohmiс resistance of the wire? The metal will vapour?
    2) Impedance...
  2. That's great about JBL, but i.e. 4311 are...

    That's great about JBL, but i.e. 4311 are considered as professional studio monitors, and have simple 6 db/oct X-over. How about their Z-curve?

    It is an interesting question - how old JBL speaker...
  3. In particular, what I have now for L100 is: ...

    In particular, what I have now for L100 is:

    LE123-A1 - serial coil 0.92 mH, Zobel network 20 uF + 6.8 Ohm resistor in parallel to LE123-A1, driver wired in phase,

    LE5-2 - Capacitor 36.6 uf...
  4. A novel cross-over design method (by Oddesit)

    Hi, all,

    I have a friend (his nick is Odessit) who is very good in speaker design. His method is based on two principles. This works well especially for tube amplifiers. The point is that typical...
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    LE-20-1 in L100 with simple X-over

    Hi,

    What You guys will say about using LE20-1 insread of LE25-2 in later model L100 with simple X-over? Is it reasonable? I never listen to any of them and now have to select. LE20-1 looks more...
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    Thanks! Do You think 035Tia is good only with...

    Thanks!

    Do You think 035Tia is good only with 104H and is not suitable in pair with LE5-2? I don't want now to spend extra also on new middriver.

    I have checked through various networks from...
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    Hi, Stevem, Try also my program: ...

    Hi, Stevem,

    Try also my program: http://members.fortunecity.com/winreal3d/

    Check section 10 on the web.

    You can change the shape of the box and look at the effect of internal resonances.
    ...
  8. Replies
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    5,846

    LE 25-2 better replacement

    Hi,

    I have a pair of LE123a1 and LE 5-2 drivers from original LE100 monitors and plan to build the complete speakers. The third driver (tweeter) missed in my design is LE 25-2. I think I...
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    Oh, I found the answer bu myself ...

    Oh, I found the answer bu myself

    http://www.audioasylum.com/forums/hug/messages/46419.html
  10. Replies
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    4,958

    JBL LE 5-2 driver dust central cup

    Hi,

    Could anyone please comment on JBL LE5-2 driver dust central cap form (that driver which was used in century L100 monitors):

    Should be the dust central cap be convex outside or hollow...
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    Thank You, Gordon. This is what I needed. ...

    Thank You, Gordon. This is what I needed.

    Alexander
  12. Replies
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    JBL L100: port frequency needed

    Hi,

    Does anybody know (had measured) the port frequency in original JBL L100 monitors boxes?

    Thanks,

    Alexander
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    That's the curve, JBL123-A1 is in free air, so...

    That's the curve, JBL123-A1 is in free air, so there is normal roll off at low end.

    Done with my 2a3 SE amp (it has flat responce, and about 2.5 Ohm output), the measurement is in 1/3 octave pink...
  14. Replies
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    Is 123 peaky?

    Hi, all,

    my 5 cents. I am trying now to cross 123a1 with another silk dome tweeter, and measurements (Bruel & Kier high accuracy meter) show 123 is peaky at 5 kHz. It rolls of smoothly up to 2...
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    One calculator for all enclosures

    Hi, friends,

    I am developing this project.

    See here: http://audio-fil.narod.ru

    Now it includes two open baffles, closed or open box, sealed sphere,
    two types of transmission line and Voight...
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    This is Xover network with 123-A1...

    This is Xover network with 123-A1
    http://www.audioheritage.org/vbulletin/images/attach/pdf.gif

    It says Re of 123A-1 is in the range of 4.4 to 5.5 Ohm, while this is 8 ohm impedance driver! Maybe...
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    This stands for 8 ohm version: ...

    This stands for 8 ohm version:

    http://www.bassreflex.de/index/JBL/jbl.htm

    Strange is that they wrote 8 ohm, but again 123A (without 1), while the original pdf says 123A has Re=4.4 ohm.
  18. Replies
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    JBL 123-A1 TS parameters

    Hello, friends,

    I am new to this forum.

    I am looking for TS parameters of this driver. I guess this is 8 ohm version of JBL 123A. Can anybody help?

    Thanks,

    Alexander
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