Page 4 of 4 FirstFirst ... 234
Results 46 to 51 of 51

Thread: JBL 2240 vs 2241 vs 2242 vs 2245 (H)

  1. #46
    Member
    Join Date
    Sep 2014
    Location
    Finland
    Posts
    47
    My both basket were 2241 not 2240 as i remembered. I also measured the magnet gap and it shows that 2241 magnet gap is larger than 2240 so it wount fit properly.

  2. #47
    Senior Member gibber's Avatar
    Join Date
    Oct 2009
    Location
    Munich, Germany
    Posts
    168
    Quote Originally Posted by 1audiohack View Post
    I have a question about the 2243 comment. It reads to me that the 2243 has a deeper pole piece and longer coil than the 2242? My experience shows the motor assembly of the 2242 and 2243 to be identical and the voice coil on the C8R 2243 to be shorter tham the 2242.

    Have I missed something?

    Barry.

    Hi Barry,

    i have a dead 2243 and opened it. The unit had previously been reconed, not sure what i saw was original, but guess it was.
    Coil is very heavy, probably pure copper not alu wire, about 2 cm long on a former that looks identical to 2242.

    The magnet is significantly bigger than on a 2242. I recall something like 22 cm. Think 2226 vs 2227 magnet.

    The frame is not interchangable with 2242 for another reason. In 2242, the magnet top pole piece is basically at the same plane as the basket's spokes converging on the centre section that holds the magnet. On 2243, the basket is extended to the back by about a cm and holds the magnet from there, see my picture.
    Name:  2243.jpg
Views: 1255
Size:  44.2 KB



    EDIT: i checked some pics on eBay and it seems some of the 2242H's recently on sale there have this extension to the back also. Not sure all of them have it, as this detail is not pictured often. So maybe i have to eat my words, i currently have no 2242 basket at hand to cross-check, unfortunately.

    A difference apart from wire material definitely is the ribbing of the cone goes close to the dust cap in 2242; whereas the wide unribbed inner section near the dust cap is heavily reinforced with resin on my 2243's.
    That rib structure is (i believe) designed to allow for gradual de-coupling of outer cone sections by introducing an intended controlled structural weakness to the cone with regard to lower mid and midrange frequencies.

    Ralph
    Last edited by gibber; 03-31-2016 at 03:06 PM. Reason: see above

  3. #48
    Senior Member gibber's Avatar
    Join Date
    Oct 2009
    Location
    Munich, Germany
    Posts
    168

    Some 2243H TS data

    Not sure the 2243H data is somewhere here on the forum already:

    the unit pictured above showed fs=29Hz, Re=5.2Ohm, Zm= 76Ohm, Qms=2.9, Qes=0.21, Qts=0,195.
    Vas wasn't measured.

    Ralph

  4. #49
    Senior Member grumpy's Avatar
    Join Date
    Oct 2003
    Location
    SoCal
    Posts
    5,692
    The Transducer section is a good place to look:

    http://www.audioheritage.org/vbullet...hp?10653-2243H

  5. #50
    Junior Member
    Join Date
    Dec 2012
    Location
    United Kingdom
    Posts
    9
    Does anyone know if a 2245H driver chassis can take a 2242H recone kit?
    Thanks
    DM

  6. #51
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    4,947
    Quote Originally Posted by darkmatter View Post
    Does anyone know if a 2245H driver chassis can take a 2242H recone kit?
    Thanks
    DM
    It can't ( you can't put a 2242 kit in a 2245 chassis ).

    They have 2 different depth top-plates ( iow; gap depth ).

    The 2245 chassis can accept a 2240 recone kit ( which is NLA as OEM but most likely available as an aftermarket kit ).


Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 2241 vs 2242
    By louped garouv in forum Lansing Product General Information
    Replies: 9
    Last Post: 05-03-2014, 01:01 PM
  2. Differences between the 2240 and 2242
    By Midnight in forum Lansing Product Technical Help
    Replies: 1
    Last Post: 12-03-2008, 11:58 AM
  3. Replace 2241 with 2242 or 2268 -- Can I ???
    By though in forum Lansing Product General Information
    Replies: 15
    Last Post: 07-11-2007, 04:34 PM
  4. 2240 + 2241
    By imtkjlu in forum Lansing Product Technical Help
    Replies: 0
    Last Post: 03-05-2005, 03:45 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
  •