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Thread: Woofer diff?

  1. #1
    Senior Member Donald's Avatar
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    Woofer diff?

    What is the difference between a 123A-1 and a 123A-3? In a pair of L100's would I hear a difference between the 2 cabinets?
    had L25,L36,L40,L120,L300,AquariusIV(2),S1,4408 have L65,L100,L222,DorianS12,B380

  2. #2
    Senior Seņor boputnam's Avatar
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    Another Polarity question...



    The 123A-1 is a positive LF - opposite JBL convention.

    The 123A-3 is a negative LF, maintaining JBL convention.

    If you were to swap-in a 123A-3 into a L100, reverse wire it AT the transducer binding posts (i.e., connect GRN to Black).

    If you Search the Forum for these, you should find some discussion re: the L100 series. The 123A-3 is used in the "L100 Late Model", and can be replaced by the 2213H (negative, and used in the 4312) without reversing polarity.

    Clear as Everclear, I know...
    bo

    "Indeed, not!!"

  3. #3
    Senior Member Donald's Avatar
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    Thanks for the info.
    had L25,L36,L40,L120,L300,AquariusIV(2),S1,4408 have L65,L100,L222,DorianS12,B380

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