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Thread: 2426j Vs 2427j ?

  1. #1
    Senior Member macaroonie's Avatar
    Join Date
    Jan 2005
    near Glasgow Scotland

    2426j Vs 2427j ?

    Are the core drivers the same ? I know 2427J comes with an adapter snout to mate to a 2" rhroat.
    Can't seem to find definitive info from JBL sheets.


  2. #2
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Yes it's a 2425S or a 2426 with the screw on horn mounting plate removed and the 2" throat on instead

    "I could be arguing in my spare time"

  3. #3
    Senior Member Odd's Avatar
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    May 2009
    Oslo, Norway
    43XX (2235-2123-2450-2405-CC 3155)5235-4412-4406-4401-L250-18Ti-L40-S109 Aquarius lV-C38 (030) 305P MkII

  4. #4
    Senior Member
    Join Date
    Apr 2003
    GTA, Ont.
    FWIW ( likely some really tedious info ),

    According to the spec sheets;

    The 2425x model used a ring of pure silver ( surrounding the pole piece ) to offset voice-coil inductance ( it shared this design feature with previous alnico models ( see the 2420 cut-sheet ).

    The redesigns of the 1" exit drivers ( 2426/7 ) changed this inductance controllig ring to one that was copper-clad.

    ( One can measure the difference around 12K-15K , if one really works at it ).

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