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  1. #1
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    Mar 2018
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    Constanta/Romania
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    help for JBL 4425 crossover problem

    Have a problem with JBL 4425 crossover.
    R201 (LPad nr. 2) N36-58450 (8ohm/30W) have a very very little influence, close to zero, almost non-existent.
    In my opinion for my JBL 4425 speakers R201 is not justified.
    In JBL4425 Specification Document can see another things if you study the control range chart - high.

    http://www.jblpro.com/pub/recording/4425.pdf

    Made some schematics design research, and redesigned the circuit, see the pictures:

    R201 made a short-circuit for R4 and put 8uF capacitor to negative pole.
    total resistance varies from 0 to 5,714 ohm
    Did I miss something ?
    There is someone who has JBL 4425 to tell me if turn High Frequency Level knob - LPad 2 (R201) from minimum to maximum
    how effective in correcting sound is ?
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