Page 3 of 4 FirstFirst 1234 LastLast
Results 31 to 45 of 56

Thread: JBL 2441 vs 2445 vs 2446

  1. #31
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    3,092
    Just the standard D16R2450's, they are suprizingly well behaved. That's one more pair of diaphragms in the mix!

    I think JeffW is sending a 2452, the test pile just keeps getting bigger!
    If we knew what the hell we were doing, we wouldn't call it research would we.

  2. #32
    Senior Member
    Join Date
    Oct 2003
    Location
    Texas
    Posts
    1,863
    Quote Originally Posted by 1audiohack View Post
    I think JeffW is sending a 2452, the test pile just keeps getting bigger!
    Ooops, forgot that one. I'll send it out tomorrow!

  3. #33
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    3,092
    Thanks, when it comes time to send it all back at least I'll get UPS 100+ pound weight break!
    If we knew what the hell we were doing, we wouldn't call it research would we.

  4. #34
    Senior Member Lee in Montreal's Avatar
    Join Date
    Sep 2010
    Location
    Montréal
    Posts
    2,487
    Lots of very good comments in this thread. Despite the mild comments, I still ended up buying two 2445s for $125 each, with original JBL diaphragms. The intention is to "appreciate" them as they are for a while, and then find some better diaphragms along the way.

    Also realizing that I have no choice but going to a four way system and needing to buy another active crossover, unless I make a dividing network (with L pad) between the 2445 and the 2405 with crossover at around 8KHz, and keep running one 3-way active crossover only. The positive point is that it is much cheaper to make a crossover for high frequencies than low ones...

  5. #35
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    3,092
    Quote Originally Posted by 1audiohack View Post
    Just the standard D16R2450's, they are suprizingly well behaved. That's one more pair of diaphragms in the mix!
    I need to revisit these 2445's, after talking with a couple of forum members it is probable that I incorrectly identified the diaphragms, I am reasonably sure they are Ti, but they are smooth, not ribbed as apparently the D16R2450 diaphragms are? This one looks like an uncoated D16R2452SL by sight and measurement. I have a 2452H here that I need to get apart, I will see what that one looks like, another possibility is the diaphragm that comes in the 2451 I guess.

    What ever they are they sound and measure good.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  6. #36
    Senior Member grumpy's Avatar
    Join Date
    Oct 2003
    Location
    SoCal
    Posts
    5,742
    So ignoring phenolic and specialty consumer drivers,
    the 4" dia seem to be assignable to 5 categories
    (other variations seem to only be impedance (8/16) and included
    hardware):

    Al concentric surround/smooth dome (2440)
    Al diamond surround/smooth dome (2441)
    Ti diamond surround/smooth dome (2445)
    Ti diamond surround/ribbed dome (2446)
    Ti diamond surround/smooth dome/aquaplas (2450SL)

    ...the last three being not limited to the example driver listed.

    Does that sound about right?

  7. #37
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    3,092
    Thank you. I will have to look again, it's all a blur now.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  8. #38
    RE: Member when? subwoof's Avatar
    Join Date
    Aug 2003
    Location
    fingerlakes region, NY
    Posts
    1,899

    edit:

    Slight edit:

    Al concentric surround/smooth dome (2440)
    Al diamond surround/smooth dome (2441)
    Ti diamond surround/smooth dome (2445)
    Ti diamond surround/ribbed dome (2446)
    Ti diamond surround/smooth dome/aquaplas (2450SL)

    should be:

    Al concentric surround/smooth dome (2440)
    Al diamond surround/smooth dome (2441)
    Ti diamond surround/smooth dome (2445)
    Ti diamond surround/ribbed dome (2446 / 2450)
    Ti diamond surround/smooth dome/aquaplas (475)
    ( there was no pro model 2" exit with a coated dia )

    the 2450SL ( coated, smooth Ti ) was a 1.5" exit - and it had a different mounting bolt dia than the non-coated 2451. 2450SL-a was the coated, ribbed Ti.

    The newer 2452SL has the coated, smooth Ti but has a pair of special push terms added to a stock 2450SL dia.


  9. #39
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    3,092
    Ok the 2445's that I like have D16R2445's in them, Ti, diamond surround, smooth dome.

    Thanks guys!
    If we knew what the hell we were doing, we wouldn't call it research would we.

  10. #40
    Senior Member
    Join Date
    Aug 2010
    Location
    Jättendal (Giant Valley), Sweden
    Posts
    763
    Quote Originally Posted by subwoof View Post

    the 2450SL ( coated, smooth Ti ) was a 1.5" exit - and it had a different mounting bolt dia than the non-coated 2451. 2450SL-a was the coated, ribbed Ti.

    The newer 2452SL has the coated, smooth Ti but has a pair of special push terms added to a stock 2450SL dia.
    But will these go into any 2" exit driver?

  11. #41
    Senior Member jerv's Avatar
    Join Date
    May 2006
    Location
    Norway
    Posts
    185
    Quote Originally Posted by more10 View Post
    But will these go into any 2" exit driver?
    D8R2450SL diaphragms fits into all 2"exit drivers. I use them in 2445's with very good results.

    2452SL diaphragms have different (integrated) terminals, and does not fit 2" exit drivers.

  12. #42
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    France
    Posts
    2,628
    these terminals can be removed without problem

  13. #43
    Senior Member grumpy's Avatar
    Join Date
    Oct 2003
    Location
    SoCal
    Posts
    5,742
    ... and added. I've put a 2450SL dia in a 2452H body. I just reused the rubber 'plugs' and threaded terminals.

    The 'different mounting bolt dia' referred to by 'beer is for the horn/driver interface,
    not the diaphragm.

    I haven't tried the TrueXtent dias in the 2452 body, but IIRC, someone here has
    (perhaps requiring a trim of the rubber plug/gasket things, as the dia frame seems
    a bit taller... I haven't measured them or looked it up).

  14. #44
    Senior Member pos's Avatar
    Join Date
    May 2007
    Location
    France
    Posts
    2,628
    Cooky did it without major issue:
    http://www.audiosmile.com/forum/show...2&postcount=87

  15. #45
    Senior Member
    Join Date
    Oct 2003
    Location
    Texas
    Posts
    1,863
    I wish he would have taken one more set of pics showing how he hooked the terminals up.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 2446(2445?2447?) + large enough inwall horns ..
    By Flaesh in forum Lansing Product DIY Forum
    Replies: 5
    Last Post: 12-15-2009, 11:02 PM
  2. JBL 2446
    By schiller in forum Lansing Product Technical Help
    Replies: 0
    Last Post: 03-25-2007, 09:23 AM
  3. Swap 2441 Diaphragm into 2445?
    By Steve Gonzales in forum Lansing Product Technical Help
    Replies: 15
    Last Post: 02-13-2006, 12:12 AM
  4. 2441 +2445 Diaphram
    By John in forum Lansing Product Technical Help
    Replies: 5
    Last Post: 06-16-2003, 12:50 PM

Posting Permissions

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