Page 1 of 3 123 LastLast
Results 1 to 15 of 36

Thread: JBL 4345 CNC'd new build

  1. #1
    Member
    Join Date
    Apr 2013
    Location
    Sydney
    Posts
    48

    JBL 4345 CNC'd new build

    Pristine components, making this new large build.

    Euro birch, with Oak finish (not yet stained).

    Kenrick Sound style stands in matching Oak.

    JBL blue is a challenge....this client wished for a brighter blue, Dulux Wingman Blue.

    Many many hours of work.

    Massive 3 way xover, with DSP active bass.

    Andrew
    Attached Images Attached Images   

  2. #2
    Member
    Join Date
    Apr 2013
    Location
    Sydney
    Posts
    48
    Additional pics with xover. DSP used for bass (Bryston amps).

    The pic with stands had the white ports before painting.

    Needing to do final sanding then "ye olde" bees wax finish.

    Andrew

    (PS, these available in CAD/CNC files, flat pack kits...world wide shipping.)
    Attached Images Attached Images     

  3. #3
    Senior Member
    Join Date
    Apr 2003
    Location
    Australia
    Posts
    7,942
    Nice work

  4. #4
    Member
    Join Date
    Apr 2013
    Location
    Sydney
    Posts
    48
    Quote Originally Posted by Ian Mackenzie View Post
    Nice work
    Thanks Ian, a fun journey. I did not have all the gear to run multiple amps....but I did test the rig...wow, great output, lovely clean/tight sound.

  5. #5
    Senior Member just4kinks's Avatar
    Join Date
    Oct 2006
    Location
    San Jose, CA
    Posts
    223
    Please tell us more about your CNC setup. You stick plywood in one end and speakers pop out the other?

  6. #6
    Member
    Join Date
    Apr 2013
    Location
    Sydney
    Posts
    48
    Quote Originally Posted by just4kinks View Post
    Please tell us more about your CNC setup. You stick plywood in one end and speakers pop out the other?
    Hi, I'm a little unsure of your comment, kindly.

    I used the JBL dims to CNC the original 19mm ply baffle. Then I added a further 3mm MDF baffle, which was glued onto the original ply baffle.

    I then "adjusted" the rear of the rear of the baffle by routering to ensure accurate depth of mounting the horns.

    Ideally, this should have been completed with the original ply baffle (which was painted in expensive two pack poly), but I made a mistake in mounting the tweeter. As such, the "original" baffle had four incorrect holes drilled. The client, naturally, was not happy.

    As such, I CNC'd a new front "skin" in 3mm MDF, then repainted in same two pack poly blue.

    All good.

    Does this answer your inquiry?

    Kindly

    Andrew

    (PS, with CNC, I now can offer all of the famous JBL monitors in CAD/CNC file, or kit form, or fully built.)
    Attached Images Attached Images  

  7. #7
    Senior Member
    Join Date
    Apr 2016
    Location
    mid ohio
    Posts
    129
    Nice work!

    I don't understand the need to add a 3mm MDF front to the baffle, when a 19mm baltic birch (3/4") is the spec.

  8. #8
    Member
    Join Date
    Apr 2013
    Location
    Sydney
    Posts
    48
    Quote Originally Posted by DES-1 View Post
    Nice work!

    I don't understand the need to add a 3mm MDF front to the baffle, when a 19mm baltic birch (3/4") is the spec.
    Des, as I wrote below -

    ".....but I made a mistake in mounting the tweeter. As such, the "original" baffle had four incorrect holes drilled. The client, naturally, was not happy." Quite a lot of work to correct 4 small holes, but worth it in the long run.

    See the pic below with the speakers on the stands...look closely at the tweeters...the square bracket is incorrectly placed on the front of the baffle, not the rear...hence the additional screw holes in error.

    One good thing came of this, I drilled 4 magnets into the "original" baffle to support the grill frame (also with magnets). The 3mm MDF new skin then covered the hidden magnets....and is thin enough for them to work equally as strong.

  9. #9
    Senior Member
    Join Date
    Apr 2016
    Location
    mid ohio
    Posts
    129
    Ah, OK, thanks for the explanation. Many would have just filled the holes filled the holes and adjusted cosmetics until undetectable. Your fix looks great though

  10. #10
    Senior Member gdmoore28's Avatar
    Join Date
    Jan 2014
    Location
    Arkansas
    Posts
    245
    Brilliant work, Atilsley! Those look great.

    GeeDeeEmm

  11. #11
    Member
    Join Date
    Feb 2017
    Location
    League City Texas
    Posts
    36

    Crossover

    Quote Originally Posted by gdmoore28 View Post
    Brilliant work, Atilsley! Those look great.

    GeeDeeEmm
    Great Job, I would like to know more about the crossover.

  12. #12
    Member
    Join Date
    Apr 2013
    Location
    Sydney
    Posts
    48
    Bees wax added, grill frames built...hidden magnets (behind 3mm "front" baffle). I like the Oak veneer.
    Attached Images Attached Images   

  13. #13
    Member
    Join Date
    Apr 2013
    Location
    Sydney
    Posts
    48
    Pair polished.
    Attached Images Attached Images  

  14. #14
    Senior Member
    Join Date
    Apr 2016
    Location
    mid ohio
    Posts
    129
    That's a nice look, squared front and flush grill

  15. #15
    Member
    Join Date
    Apr 2013
    Location
    Sydney
    Posts
    48
    Quote Originally Posted by DES-1 View Post
    That's a nice look, squared front and flush grill
    Thanks for your kind remarks.

    The front is not really 'square,'....the Oak trim is angled....but the photo doesn't show it up very well.

    I wasn't sure why the original grills needed to protrude so much...hence flush.
    Attached Images Attached Images  

Thread Information

Users Browsing this Thread

There are currently 2 users browsing this thread. (0 members and 2 guests)

Similar Threads

  1. 4345 Hybrid Build
    By DES-1 in forum Lansing Product DIY Forum
    Replies: 16
    Last Post: 07-21-2018, 04:11 PM
  2. My new JBL 4345 build.
    By fencki in forum Lansing Product DIY Forum
    Replies: 62
    Last Post: 06-06-2017, 01:55 AM
  3. JBL 4345 build
    By quindecima in forum Lansing Product DIY Forum
    Replies: 128
    Last Post: 08-04-2016, 07:20 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
  •