Page 1 of 5 123 ... LastLast
Results 1 to 15 of 68

Thread: 2435HPL vs. 435Be

  1. #1
    jim henderson
    Guest

    2435HPL vs. 435Be

    Does anyone know the differences between the 2435HPL and 435Be? They're both 3" beryllium diaphragms. Are they both 1.5" exit? The cases are obviously different. The 435Be are apparently Aquaplas coated.

  2. #2
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    9,981
    They both use the same motor and diaphragm, but the civilian version has a larger rear cavity as well as those pretty fins.

    I don't know if the 2435HPL has aquaplas or not. They both use fero fluid and take the same 1.5" horns.

    Widget
    Last edited by Mr. Widget; 04-07-2004 at 09:07 PM.

  3. #3
    RE: Member when? subwoof's Avatar
    Join Date
    Aug 2003
    Location
    fingerlakes region, NY
    Posts
    1,898
    Hey there - I have a pair of the 2435HPL's - no aquaplas, no pretty fins but are 1.5" and damn light...

    sub

  4. #4
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    9,981
    The 435Be is a shockingly light driver as well. Probably only a tad heavier due to the larger cast aluminum rear chamber.

    Subwoof,

    How do they sound? What horns are you using with them?

    Widget

  5. #5
    RE: Member when? subwoof's Avatar
    Join Date
    Aug 2003
    Location
    fingerlakes region, NY
    Posts
    1,898
    Right now they are stuck on the new 2313's I made ( see other post ) and they are much smoother than the 2421B they replaced.

    Below is a picture.....

    However I am awaiting the 2332's.....gonna retrofit the baffles on the 4345's to allow those ( and the original ) horns to be used.

    When I get them I will try a number of driver / horn combinations and post my observations.

    I have never been a big fan of having short wavelength audio splattered by plastic ( or metal ) plates to create width. This also allows me to make shallow depth grills to minimize the overall cabinet depth.

    sub
    Attached Images Attached Images  

  6. #6
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,506
    Hi Sub!

    Can you provide us with response measurements of the driver? I heard at the music fair in frankfurt that the 2435 needs a strong HF EQ as the Mids are soooo much louder.

    Thanks!

  7. #7
    RIP 2009
    Join Date
    Feb 2004
    Location
    Rohnert Park, CA
    Posts
    3,790
    Any idea how the 2435HPL compares with the 2430H? Is the only difference the aluminum diaphragm in the 2430H? I'm on the verge of getting a pair of 2430H and the 2332 horns...(gathering all the parts for a custom HT system...).

    John

  8. #8
    RE: Member when? subwoof's Avatar
    Join Date
    Aug 2003
    Location
    fingerlakes region, NY
    Posts
    1,898
    hey there... I have no current way to measure this driver - I have retired ( sold ) all the old analog test gear and will be jumping into the newer DSP based measurement setup when I get a settlement this summer.

    I don't even have a functional RTA at the moment...

    Every time I restore one a customer begs to buy it and *poof* it's gone...

    sub

  9. #9
    jim henderson
    Guest
    I'm finally getting my test equipment together. Here's some preliminary measurements:

    http://www.pogeyrealestate.com/perso...asurements.htm

  10. #10
    RIP 2009
    Join Date
    Feb 2004
    Location
    Rohnert Park, CA
    Posts
    3,790
    So any impressions on what the 2435HPL with the 2332 horn sounds like yet?

    John

  11. #11
    jim henderson
    Guest
    So far it appears to be rather harsh, but that's probably a result of my test components:

    Source: computer with M Audio 2496 card
    Ashly 4.24G crossover/EQ
    QSC 502 for the 1400ND
    McCormack DNA 0.5 for the 2435

    My good source equipment is in a rack in another room, so I haven't tried it yet.

    The pulse artifact concerns me, so I'd like to solve that mystery first.
    Last edited by jim henderson; 04-13-2004 at 10:19 AM.

  12. #12
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,577
    Originally posted by jim henderson
    So far it appears to be rather harsh . . .

    The pulse artifact concerns me, so I'd like to solve that mystery first.
    Is it possible the pulse artifact is stored energy in the diaphragm surround or back chamber? What about changing the damping to see if that has an effect? (That is, if you dare mess with a diaphragm that would cost $700+ to replace . . . I don't know as I would.)

    I wonder if anyone at JBL would talk about it.

  13. #13
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,577
    Widget says, "the civilian version has a larger rear cavity."

    I wonder if the reason is to do something about this echo you've found.

  14. #14
    Alex Lancaster
    Guest

    Smile

    Hi:

    It woulnīt be too hard to make a spacer to increase the back chamber volume.

  15. #15
    jim henderson
    Guest
    The "echo" comes about 1.4 ms after the pulse response. Does that seem to be too long to be stored energy in the diaphragm surround or back chamber?

    I'll continue to mix and match components and environments this weekend.

    Has anyone taken a 2435 apart? I've never taken a compression driver apart. Would I have to realign the diaphragm?

    I wonder what the back chamber volume difference is and why JBL added volume to the 435Be? Is there damping material in the 435Be back chamber?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Let's discuss horn preferences
    By HenryW in forum Lansing Product Technical Help
    Replies: 54
    Last Post: 07-14-2004, 05:44 AM
  2. 435Be
    By boputnam in forum Public Forum - Reference Information
    Replies: 2
    Last Post: 01-24-2004, 10:59 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •