Page 1 of 2 12 LastLast
Results 1 to 15 of 19

Thread: Cabs Recommendation for LE14

  1. #1
    Senior Member
    Join Date
    Feb 2004
    Location
    Land of Sunshine
    Posts
    409

    Cabs Recommendation for LE14

    Hi,

    I am thinking of starting a project based around the LE14. Anybody has a cabinet plan that I could used? I tried to look up the plans in the libarary but couldn't find any. Thanks.

  2. #2
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,548
    1.8 to 4.0 cubic feet tuned to 28 Hz to 30 Hz.

  3. #3
    Senior Member
    Join Date
    Feb 2004
    Location
    Land of Sunshine
    Posts
    409
    Hi Giskard,

    Could you also kindly advise on the port size and length? Actually, is there a baffle design that only has an opening (sort of like the Altec A7) but w/o any duct? It would be much easier to fabricate.

    Thanks.

  4. #4
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    8,053
    Hello ngccglp

    You need the internal volume to calculate port size depending on the box tuning. You can get a free box program here WinIsd

    http://www.linearteam.dk/default.aspx?pageid=winisd

    Or use the clasic boxes JBL used from the plans section:

    http://www.lansingheritage.org/html/.../jbl-plans.htm


    Rob

  5. #5
    Senior Member Hamilton's Avatar
    Join Date
    Aug 2005
    Location
    Huntington Beach, CA
    Posts
    229
    I just built a pair on Zilch's recommendation using the L200t3 layout, but brought the internal specs down to 3.5 cu. ft, (2) 3" ports 8 ½" long for LE14As.

    http://manuals.harman.com/JBL/HOM/Te...200t3%20ts.pdf
    Attached Images Attached Images  
    There are two theories to arguing with women, but...neither has worked.

  6. #6
    Senior Member
    Join Date
    Feb 2004
    Location
    Land of Sunshine
    Posts
    409
    Thanks. Will give the software a go asap.

    Hamilton, nice cabs.

  7. #7
    Senior Member
    Join Date
    Feb 2004
    Location
    Land of Sunshine
    Posts
    409
    I think I have figured out the way to design and tune a bass cab to the required freq. However, I need advice on the optimal shape of the curve. I noticed a hump around the tuning freq as I increase the freq values, same thing happens when I increase the volume.

    Is the objective to smoothen out the hump or is it OK to have a bit of the hump?

    Thanks.
    Attached Images Attached Images  

  8. #8
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,548
    These days the goal appears to be to get a nice banana curve that will self equalize when placed in a typical room.

    I actually took a minute to run Hamilton's implementation mentioned above in BB6P and here's the result:

    Usable response to ~ 25 Hz with a nice ~ 18 dB/octave rolloff as expected with a quasi-third order alignment.
    Attached Images Attached Images  

  9. #9
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,548
    Quote Originally Posted by Hamilton
    I just built a pair on Zilch's recommendation using the L200t3 layout, but brought the internal specs down to 3.5 cu. ft, (2) 3" ports 8 ½" long for LE14As.

    http://manuals.harman.com/JBL/HOM/Te...200t3%20ts.pdf
    http://audioheritage.org/vbulletin/s...&postcount=295

    http://audioheritage.org/vbulletin/s...&postcount=307

    http://audioheritage.org/vbulletin/s...&postcount=308

  10. #10
    Senior Member gerard's Avatar
    Join Date
    Sep 2004
    Location
    Casablanca - Morocco
    Posts
    333
    Hello


    Question for Le14 ?.

    What is the best : 1 bigger port or 2 small ones like the picture ?

    Gerard

  11. #11
    Senior Member
    Join Date
    Feb 2004
    Location
    Central Coast California
    Posts
    9,033
    The LE14H-3 is dual ported to the front in the PS1400 enclosure. It uses "Freeflow" flared tubes. The cab is approximatley 15x20x19.
    Out.

  12. #12
    Senior Member Hamilton's Avatar
    Join Date
    Aug 2005
    Location
    Huntington Beach, CA
    Posts
    229
    Giskard, the stock nL200t3 was WAY too hot in HF, we ended up installing a fixed L-pad, around -6 db I believe; Zilch drew up the schematic.
    Attached Images Attached Images  
    There are two theories to arguing with women, but...neither has worked.

  13. #13
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,548
    Quote Originally Posted by Hamilton
    Zilch drew up the schematic.
    Post it.
    Quote Originally Posted by Hamilton
    Giskard, the stock nL200t3 was WAY too hot in HF, we ended up installing a fixed L-pad, around -6 db I believe.
    There is absolutely no way the 14" LE14 is 6 dB less efficient than the 12" 120T3. What components are you using?

  14. #14
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,548
    Quote Originally Posted by gerard
    Hello


    Question for Le14 ?.

    What is the best : 1 bigger port or 2 small ones like the picture ?

    Gerard
    A single larger port is always the best bet, but multiple ports can be used if compensated for. I usually go with dual ports myself.

  15. #15
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    8,053
    What's the DCR on L1 the coil across the driver?? Should be 7.5 ohms.

    Rob

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Building cabs for 2242's
    By JuniorJBL in forum Lansing Product DIY Forum
    Replies: 39
    Last Post: 08-23-2005, 08:39 AM
  2. Need Recommendation for Analyzer (FFT, TDS, etc.)
    By David Dryden in forum Lansing Product Technical Help
    Replies: 7
    Last Post: 01-25-2005, 10:33 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
  •