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Forum: Lansing Product Technical Help

Questions on repairing, restoring or upgrading factory systems and components from JBL, Altec or LMCo

  1. Sticky Thread Sticky: JBL Technical Notes - LOT'S of them!!!

    Started by DogBox, 06-19-2019 08:01 PM
    • Replies: 9
    • Views: 6,721
    08-22-2019, 07:50 PM Go to last post
  2. Sticky Thread Sticky: 4340 & 4341 references thread

    Started by hjames, 05-11-2007 04:40 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 42,639
    06-11-2016, 12:00 PM Go to last post
  3. Post Sticky Thread Sticky: Stock Altec/JBL Physical Enclosure Information

    Started by 4313B, 09-11-2004 11:56 AM
    4 Pages
    1 2 3 4
    • Replies: 51
    • Views: 124,313
    06-24-2015, 09:05 AM Go to last post
  4. Sticky Thread Sticky: 4343 References Thread

    Started by hjames, 05-30-2007 05:01 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 65,934
    10-30-2012, 11:35 PM Go to last post
  5. Thumbs up Sticky Thread Sticky: JBL Technical Information - Links

    Started by boputnam, 02-06-2008 12:34 AM
    • Replies: 1
    • Views: 29,942
    08-05-2008, 06:54 AM Go to last post
  6. Sticky Thread Sticky: READ ME - Forum Rules

    Started by Don McRitchie, 06-28-2004 07:27 AM
    • Replies: 2
    • Views: 26,141
    10-20-2006, 02:48 AM Go to last post
  1. JBL 2446H measurements question

    Started by TomR3399, 05-07-2020 10:07 AM
    • Replies: 4
    • Views: 758
    05-08-2020, 01:22 PM Go to last post
  2. JBL 2122h Midrange Woofer Seems extremely stiff

    Started by jbljr, 04-22-2020 09:45 PM
    • Replies: 4
    • Views: 988
    05-08-2020, 11:05 AM Go to last post
    • Replies: 0
    • Views: 490
    05-08-2020, 03:00 AM Go to last post
  3. JBL 4435 mid/high attenuators upgrade.

    Started by JoeNelis, 05-07-2020 02:02 PM
    • Replies: 2
    • Views: 542
    05-07-2020, 11:27 PM Go to last post
  4. JBL UREI 5235 Input and out impedance mismatch

    Started by jbljr, 05-07-2020 11:09 AM
    • Replies: 1
    • Views: 518
    05-07-2020, 03:36 PM Go to last post
    • Replies: 5
    • Views: 861
    05-06-2020, 10:57 AM Go to last post
  5. deleted

    Started by sonofagun, 05-02-2020 11:41 AM
    • Replies: 0
    • Views: 552
    05-02-2020, 11:41 AM Go to last post
  6. 250ti left and right speaker sound very different

    Started by limpan, 04-29-2020 09:17 AM
    2 Pages
    1 2
    • Replies: 18
    • Views: 1,819
    05-01-2020, 12:24 PM Go to last post
  7. E155-4 testing (long)

    Started by grumpy, 04-25-2020 05:37 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 1,888
    04-28-2020, 11:22 AM Go to last post
  8. 2205B spec's

    Started by kingfisher, 04-18-2020 11:48 AM
    • Replies: 12
    • Views: 1,319
    04-22-2020, 02:15 AM Go to last post
  9. 4350 crossover wiring

    Started by C6Z06, 04-20-2020 01:47 PM
    • Replies: 3
    • Views: 677
    04-21-2020, 01:22 PM Go to last post
  10. Need help to ID these slot clones

    Started by LE15-Thumper, 04-18-2020 01:54 PM
    • Replies: 5
    • Views: 767
    04-19-2020, 02:13 PM Go to last post
  11. Weird "out of phase" effect on JBL 2440

    Started by retro soulman, 04-17-2020 10:03 AM
    • Replies: 4
    • Views: 707
    04-18-2020, 10:06 AM Go to last post
  12. Underhung voice coil specs

    Started by budney, 03-24-2020 08:58 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 2,074
    04-17-2020, 04:40 PM Go to last post
  13. Help with 4" driver impedance plots

    Started by sebackman, 04-14-2020 02:15 PM
    • Replies: 4
    • Views: 654
    04-15-2020, 10:54 AM Go to last post
  14. Swap foam in the back cap of 4" drivers to felt?

    Started by sebackman, 11-14-2015 03:11 AM
    2 Pages
    1 2
    • Replies: 23
    • Views: 8,039
    04-14-2020, 02:21 PM Go to last post
  15. Effects of loss of magnetism?

    Started by Eric M., 03-26-2020 11:44 AM
    3 Pages
    1 2 3
    • Replies: 31
    • Views: 2,887
    04-13-2020, 05:32 PM Go to last post
    • Replies: 5
    • Views: 812
    04-11-2020, 09:02 PM Go to last post
  16. JBL 2440 off-center vc gap.

    Started by retro soulman, 04-03-2020 07:57 AM
    • Replies: 9
    • Views: 959
    04-10-2020, 12:29 PM Go to last post
  17. Going to active xover

    Started by maxserg, 04-08-2018 03:30 PM
    2 Pages
    1 2
    • Replies: 25
    • Views: 5,227
    04-08-2020, 05:09 PM Go to last post
  18. Replacement diaphragm for 2421A?

    Started by Kay Pirinha, 04-03-2020 09:17 AM
    • Replies: 13
    • Views: 1,349
    04-06-2020, 05:41 PM Go to last post
  19. foam or felt in the cover

    Started by louped garouv, 10-27-2009 06:47 PM
    2 Pages
    1 2
    • Replies: 24
    • Views: 12,456
    04-04-2020, 02:45 AM Go to last post
    • Replies: 5
    • Views: 708
    04-03-2020, 09:05 PM Go to last post
  20. Altec N-3000-E Mystery

    Started by soundguy64, 12-18-2018 11:08 PM
    • Replies: 1
    • Views: 994
    04-02-2020, 05:12 AM Go to last post
  21. 2235 white recone kit

    Started by budney, 02-09-2020 10:32 AM
    2 Pages
    1 2
    • Replies: 18
    • Views: 2,528
    04-01-2020, 04:21 PM Go to last post

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