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  1. This is the formula for capacitors in series:...

    This is the formula for capacitors in series:
    https://en.wikipedia.org/wiki/Series_and_parallel_circuits#Capacitors

    In this case, we have 1 / (1 / 30.61F + 1 / 10.2F) = ca. 7.65F
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    I bought a pair of S3100 in 2000 and was so...

    I bought a pair of S3100 in 2000 and was so pleased with them that I bought one more pair in 2004. I'm as happy with this 4.0 surround sound system today as I was 10 years ago.
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    I have a 4.0 surround sound system composed of 2...

    I have a 4.0 surround sound system composed of 2 pairs of JBL S3100. I have never missed a centre channel. It is, of course, a tall order to find and restore another pair of 4350, and that is,...
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    A nearly complete list of equipment reviewed in...

    A nearly complete list of equipment reviewed in High Fidelity can be found here:
    http://www.roger-russell.com/magrevhf.htm
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    2 tuning suggestions

    Here you have 2 tuning suggestions, both with a 10 cm port, tuned to 52 Hz and 40 Hz, respectively. In the first case with a 2 cm deep port (which, in effect, is a hole in the front baffle), in the...
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    There is no new thing under the sun

    Some of us continue to listen to surround sound on LPs, in which case the phenomenon is called quadrophony because there are 4 channels.

    The quadrophonic LPs are, admittedly, a mixed bunch, and...
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    The 150-4C went out of production before the...

    The 150-4C went out of production before the advent of Thiele-Small parameters. Somebody may have determined the Thiele-Small parameters in recent years, but you can't rely on somebody else's...
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    Thanks, Grumpy. It appears that the papers are...

    Thanks, Grumpy.

    It appears that the papers are from 1934 and not -- as stated by Mark Levinson -- from 1936. The wrong year made it impossible to find them.

    That being said, I already knew the...
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    On a more constructive note: I have in vain...

    On a more constructive note:

    I have in vain tried to find the 1936 Bell Labs papers referred to by Mark Levinson.

    Can somebody provide an exact reference?
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    In answer to Widget's questions / comments: ...

    In answer to Widget's questions / comments:

    >>Are they toed in enough?
    The horn has the most regular frequency response when the listener and the 2 loudspeakers form an equilateral triangle, i.e....
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    >> the distance from the front edge of the basket...

    >> the distance from the front edge of the basket
    >> of one of your ME150H's to the dust cap glue line
    That distance is 65 mm or 2 9/16 inches.

    >> is the cone curved or straight?
    The cone is...
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    Picture of ME150H woofer

    I just took a picture of the ME150H woofer in one of my S3100:
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    118,849

    The adapter is intended to be a parabolic horn,...

    The adapter is intended to be a parabolic horn, and I know for a fact that the black block is the one half of a parabolic horn, because I did the mathematical modelling and made the CAD drawing that...
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    Try using Google to translate your request from...

    Try using Google to translate your request from Chinese to English:

    translate.google.com
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    Concerning SPL, you only state that the amp was...

    Concerning SPL, you only state that the amp was "set to a very moderate SPL". Could you be more specific? 2nd and 3rd harmonic distortion vary greatly with SPL.
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    It would appear that the H93 alias the 2311 is a...

    It would appear that the H93 alias the 2311 is a hyperbolic and not an exponential horn.

    Given a 4.61" (117.1 mm) long horn with a throat diameter of 1.925" (48.9 mm) and a mouth diameter of...
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    S2600, S3100 Loudspeaker Systems Owner's Manual

    Here is the owner's manual for the S2600 / S3100.

    Please feel free to move the PDF file to the technical library and delete this post.
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    I have tried to invert the colours which makes...

    I have tried to invert the colours which makes the graphs more legible. Do let me know if it isn't helpful, and I will delete this post.

    It is striking that there is suck-out at 19 kHz,...
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    The 150-4C went out of production several years...

    The 150-4C went out of production several years before Thiele / Small parameters came into use: http://en.wikipedia.org/wiki/Thiele_Small_parameters

    Your only chance is thus that a forum member...
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    Bonjour Roadmaster J'ai fait des traductions...

    Bonjour Roadmaster

    J'ai fait des traductions pour le bnfice des membres parlant anglais ou allemand. Je peux t'aider, si Matthias ne rpond pas.

    German translation:
    Hallo Matthias
    Ist es...
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    Where can we read more about cousin Bjrn's horns?

    Where can we read more about cousin Bjrn's horns?
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    Steve: Thank you very much for the reproduction...

    Steve: Thank you very much for the reproduction of the article in the June 1940 issue of Electronics.

    Iain42: Thanks for the picture. It's sad to see that the (only?) extant woofer is in such...
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    450 lb. field coil

    I have just read this article about Rudy Bozak:
    http://en.wikipedia.org/wiki/Rudy_Bozak#Loudspeakers

    At the 1939 New York World's Fair, a tower topped with a cluster of eight 27" Cinaudagraph...
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    chlorophyllin

    The seller has an informative picture in another auction:...
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    Carl: I take it that you are referring to...

    Carl:

    I take it that you are referring to these products:
    http://www.analog.com/embedded-processing-dsp/processors/en/index.html

    Do you have personal experience with one or more of these...
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