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Thread: What should I keep JBL 2441 ,2450 or 2451?

  1. #1
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    What should I keep JBL 2441 ,2450 or 2451?

    I need to make tuff decision.
    I need to to keep just one pair.
    What should I keep, 2441,2450 or 2451?
    My plan is to get Truextent Be diaphragm in future.

  2. #2
    Administrator Robh3606's Avatar
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    What horns do you have?? 1.5" vs 2.0" What's your best horn? I would also go for the most modern phase plug and compadibility with the Be diaphrams. For me I would choose a 2451 becasue I have Array Horns as an example.

    Rob
    "I could be arguing in my spare time"

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    Quote Originally Posted by Robh3606 View Post
    What horns do you have?? 1.5" vs 2.0" What's your best horn? I would also go for the most modern phase plug and compadibility with the Be diaphrams. For me I would choose a 2451 becasue I have Array Horns as an example.

    Rob
    Now I have 2" horns but I will make new one, probably JMCL, Tractrix or Yuichi A290, still not sure

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    > I would want do a lot more research on the following , but , because you want to install "Truextent" diaphragms ( and you live far away from where they are made ) I would keep the driver that has the best chance of getting a good mechanical fit with these new diaphragms ( all the while assuming that once bought, they aren't easily returned ) .

    > ( Hopefully I'm not starting a baseless internet rumour but ), I've read a couple of comments about users having problems with these Be diaphragms properly fitting into the older alnico ( 2440/1 ) gaps .

    > FWIW, the newer models do have 2 slightly "hogged out" areas ( in the gap ) to accommodate the ever so slight bulge in the coil-winding ( created where the coils wrap over top of the lead-in wire ) .


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    Keep the 2451. The others have an exit of about 4 degrees. Most JMCL horns have an entry angle much larger, causing a diffraction where the angle changes.

  6. #6
    Senior Member Fangio's Avatar
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    Quote Originally Posted by Earl K View Post
    > ( Hopefully I'm not starting a baseless internet rumour but ), I've read a couple of comments about users having problems with these Be diaphragms properly fitting into the older alnico ( 2440/1 ) gaps.


    No problems at all here, they are fitting exactly in my 2441's.

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    Quote Originally Posted by Fangio
    No problems at all here, they are fitting exactly in my 2441's.
    > That's excellent news Fangio ( since all I own are pairs of 2440s & 2441s ) .



  8. #8
    Senior Member louped garouv's Avatar
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    Quote Originally Posted by Fangio View Post


    No problems at all here, they are fitting exactly in my 2441's.

    the Truextent BEs went in to my 2440 motors without difficulty also...
    at least the installer did not mention any difficulties,

    I was too chicken s*_t to try fitting them myself, given the material's $$$ investment --
    I figured what's another $40 to ensure it is done right...




    edit -- i'm using the 2440 motors on either 350Hz Edgars or some DAS (or McCauley???) acoustic lens clones -- hartsfield/serpentine lenses and a 2343 shaped clone horn

  9. #9
    Obviously... not a golfer grumpy's Avatar
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    funny
    I attacked mine with an exacto knife -after- talking to the Truextent guys

    (bit of excess VC adhesive was making things... difficult... IIRC, those type of
    issues have been resolved).

    For what it's worth, they went into 2450SL motors on 2352 horns.
    It's nograveconcern to me, but it appears a fan on AVS "borrowed" my avatar...

  10. #10
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    Quote Originally Posted by grumpy View Post
    For what it's worth, they went into 2450SL motors on 2352 horns.
    How is that working out for you? What is your LF?

  11. #11
    Obviously... not a golfer grumpy's Avatar
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    I'm enjoying them. Bottoms are currently folded horns, but 4 2234's are ready for cabs
    It's nograveconcern to me, but it appears a fan on AVS "borrowed" my avatar...

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    Quote Originally Posted by grumpy View Post
    I'm enjoying them. Bottoms are currently folded horns, but 4 2234's are ready for cabs
    Any idea how the 2352 compares to the Yuichi A-290?

  13. #13
    Obviously... not a golfer grumpy's Avatar
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    I've not had the pleasure of such a comparison. Sorry.
    It's nograveconcern to me, but it appears a fan on AVS "borrowed" my avatar...

  14. #14
    Senior Member ivica's Avatar
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    Quote Originally Posted by grumpy View Post
    I'm enjoying them. Bottoms are currently folded horns, but 4 2234's are ready for cabs
    I wonder is it "better sounding", two 15-inch with ultra LF and LF network combination based on the 'mutual coupling' as in DD66000, or 18-inch with 10 (or 12 inch) , that are much less 'overlapped' frequency region (as 4345, ....), but I believe the results would be 'delivered' to us.....
    Regards
    Ivica

  15. #15
    Senior Member spkrman57's Avatar
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    I like the 2.5 way vs the 3 way.

    Quote Originally Posted by ivica View Post
    I wonder is it "better sounding", two 15-inch with ultra LF and LF network combination based on the 'mutual coupling' as in DD66000, or 18-inch with 10 (or 12 inch) , that are much less 'overlapped' frequency region (as 4345, ....), but I believe the results would be 'delivered' to us.....
    Regards
    Ivica

    Less components that have to be matched with each other.

    I'm working on putting a system together with 2 2226J's in there own cabs with a 2446/Be on Yuichi A290 clone. I'm thinking 750 hz crossover and adding a extra coil for the helper LF driver like the Everest somewhat.

    Rergards, Ron
    JBL Pro for home use!

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