Results 1 to 12 of 12

Thread: How to Remove JBL4344 back panel

  1. #1
    Junior Member
    Join Date
    Dec 2014
    Location
    hong kong
    Posts
    3

    How to Remove JBL4344 back panel

    Does anyone knows how to remove JBL4344 back panel? I did remove the woofer & the screws on the back panel and tried to hammered the back panel off from the woofer opening, but the back panel did'nt even budged.
    Your ideas are welcome, Thanks

  2. #2
    Heather [Senorita member] hjames's Avatar
    Join Date
    Nov 2005
    Location
    NoVA - DC 'burbs
    Posts
    8,356
    Quote Originally Posted by ama View Post
    Does anyone knows how to remove JBL4344 back panel? I did remove the woofer & the screws on the back panel and tried to hammered the back panel off from the woofer opening, but the back panel did'nt even budged.
    Your ideas are welcome, Thanks
    had a similar problem with an older monitor ... chances are, the gasket that helps seal the cabinet (so it performs properly) is acting like its glued down.
    Two possible solutions.
    1. best answer is use gravity to help. Put a length of 2x4 (or a couple bricks in a row) on your floor, and cover with a towel, Gently lay the back of the cabinet down against them, just below the panel you want to remove. Lift one end of the cabinet slightly, then let it fall against the covered bricks. repeat as necessary, lifting slightly higher as needed.

    2. The alternate approach is to remove the woofer and reach through the cabinet to push against the rear panel from the inside.
    maybe wack it with a rubber or plastic mallet.
    2ch: Oppo, Acurus RL-11, JBL 240ti, Heath AS101, Carver TFM-25,Von Schweikert VR4
    7: Oppo BDP103D, B&K, UREI 809A, JBL B460,

  3. #3
    Junior Member
    Join Date
    Dec 2014
    Location
    hong kong
    Posts
    3

    To Hjames

    Thanks for the info, but I am afraid it might damage the drivers inside, if I lifted it a bit and let it fall onto an 2x4 or a line of bricks. I tried to hammered the back panel off through the woofer openings, but it did'nt budge at all

  4. #4
    Heather [Senorita member] hjames's Avatar
    Join Date
    Nov 2005
    Location
    NoVA - DC 'burbs
    Posts
    8,356
    Quote Originally Posted by ama View Post
    Thanks for the info, but I am afraid it might damage the drivers inside, if I lifted it a bit and let it fall onto an 2x4 or a line of bricks. I tried to hammered the back panel off through the woofer openings, but it didn't budge at all
    well, you are only going to lift one end of it 8 inches or so ...
    slowly increase the distance and try again until the cover pops off.

    But if banging on it from the inside doesn't work, it could be basically glued on at this point.
    2ch: Oppo, Acurus RL-11, JBL 240ti, Heath AS101, Carver TFM-25,Von Schweikert VR4
    7: Oppo BDP103D, B&K, UREI 809A, JBL B460,

  5. #5
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,588
    Had the same problem with my 4345's. I happened to have on hand a length of 1 1/2" dowel, say 3 feet. I fed it through the upper port tube, angled it upward so that it rested against the inside of the inspection panel and rapped it with a hammer until the panel loosened on that end. There's really no reason to lay the speaker on its back at this point (except for removing and replacing the woofer). The panel is a close fit. It is not glued, but it may be stuck with gasketing, finish or the natural adhesion of the two particle board surfaces. Don't whale away on it, but as your frustration grows your rapping will probably become a little more vigorous. Mine really didn't take that much, so maybe it had been out before. Finally that end swung out.

    Be careful not to exert lateral force on the port tube.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  6. #6
    Senior Member
    Join Date
    Mar 2012
    Location
    TN
    Posts
    406
    I used a car jack to pry open front of 4343. Will work same way for 4344. Lay cabinet on side and access back panel through woofer hole

  7. #7
    Senior Member
    Join Date
    Jan 2013
    Location
    Boulder Creek, CA
    Posts
    399
    Quote Originally Posted by ama View Post
    Does anyone knows how to remove JBL4344 back panel? I did remove the woofer & the screws on the back panel and tried to hammered the back panel off from the woofer opening, but the back panel did'nt even budged.
    Your ideas are welcome, Thanks
    All I can say, is that you're begging for trouble. JBL saw fit to use a 1/4" x 1/4" dado for securing the rear panels on many of their speakers. If you bang on the rear panel from the inside long enough you will not only compromise the corner glue joints, you will also destroy the rear panel in the process.

    Just sayin'

    H.F.

    BTW - The components are front mounted, why would you find it necessary to remove the rear panel?

  8. #8
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,588
    Quote Originally Posted by Horn Fanatic View Post
    All I can say, is that you're begging for trouble. JBL saw fit to use a 1/4" x 1/4" dado for securing the rear panels on many of their speakers. If you bang on the rear panel from the inside long enough you will not only compromise the corner glue joints, you will also destroy the rear panel in the process.Just sayin'H.F.BTW - The components are front mounted, why would you find it necessary to remove the rear panel?
    This is really not helpful. You apparently have no direct experience with this speaker or ones similar to it.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  9. #9
    Senior Member
    Join Date
    Mar 2012
    Location
    TN
    Posts
    406
    If you use a car jack with a piece of plywood in between jack and cabinet to disperse pressure then it should work as it did for me. Make sure ALL screws are removed first and use jack on each corner if needed. Do not try to jack on one point to loosen each corner because it may add too much pressure.

  10. #10
    Senior Member
    Join Date
    Jan 2013
    Location
    Boulder Creek, CA
    Posts
    399
    Quote Originally Posted by speakerdave View Post
    This is really not helpful. You apparently have no direct experience with this speaker or ones similar to it.
    Perhaps you're right, in this case. I have dismantled and repaired several JBL cabinets where the rear panels were affixed the way I described. I've been building speakers since 1971, I'm not the novice or idiot you're trying to paint me as. I'm reading comments here about using car jacks, hammers, bricks, and two by fours in order to remove a rear panel. I suppose it hasn't occurred to anyone that torturing a cabinet made of cheap particle board may not be the right thing to do.

    H.F.

  11. #11
    Heather [Senorita member] hjames's Avatar
    Join Date
    Nov 2005
    Location
    NoVA - DC 'burbs
    Posts
    8,356
    Quote Originally Posted by speakerdave View Post
    This is really not helpful. You apparently have no direct experience with this speaker or ones similar to it.
    Quote Originally Posted by Horn Fanatic View Post
    Perhaps you're right, in this case. I have dismantled and repaired several JBL cabinets where the rear panels were affixed the way I described. I've been building speakers since 1971, I'm not the novice or idiot you're trying to paint me as. I'm reading comments here about using car jacks, hammers, bricks, and two by fours in order to remove a rear panel. I suppose it hasn't occurred to anyone that torturing a cabinet made of cheap particle board may not be the right thing to do.

    H.F.
    But most of the big JBL 4-way monitors do have panels that are not dadoed into place but are meant to be removable.
    Apparently you are not familiar with THOSE JBL cabinet designs?
    They are held in place with screws but since some have not been opened for 30 years or more, and may have been attached when the paint or finish was wet, they are effectively glued into place - with out the tongue and groove wood locks or biscuits of fine joinery.
    That's what they are discussing, much as some folks have problems getting woofers to release from the front baffleboard sometimes ...
    They are not talking about bashing off a rear panel that was joined into place.

    No flames meant or implied - just sharing something you may not have seen.

    Here is a shot from 2007 of the rear of one of my big 4-ways ... you can clearly see the screws where it was made to be opened up to access some components, such as the LE-85 horn assembly.

    Name:  4341-rearpanel-5085945.jpg
Views: 272
Size:  77.8 KB
    2ch: Oppo, Acurus RL-11, JBL 240ti, Heath AS101, Carver TFM-25,Von Schweikert VR4
    7: Oppo BDP103D, B&K, UREI 809A, JBL B460,

  12. #12
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,588
    What she said, HF. I agree with you about getting heavy handed with any of the legacy cabinets. It's just that in this particular case a little force must be judiciously applied.

    It would be nice if the op would tell us what worked.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. JBL L220 Oracle back crossover panel removal
    By script56 in forum Lansing Product Technical Help
    Replies: 20
    Last Post: 12-22-2014, 03:09 PM
  2. Flat Panel speakers
    By hjames in forum General Audio Discussion
    Replies: 35
    Last Post: 12-26-2011, 08:57 AM
  3. Flat Panel wall loudspeakers
    By JBL 4645 in forum General Audio Discussion
    Replies: 12
    Last Post: 08-15-2010, 11:32 AM
  4. HELP to change JBL4344 binding posts
    By Madien3388 in forum Lansing Product DIY Forum
    Replies: 3
    Last Post: 01-09-2009, 01:42 PM
  5. User control panel problems
    By sonofagun in forum Forum Feedback
    Replies: 5
    Last Post: 01-05-2006, 02:38 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
  •