Page 1 of 4 123 ... LastLast
Results 1 to 15 of 98

Thread: JBL 4355 Replica

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221

    JBL 4355 Replica

    Dear JBL lovers,
    I would like to share with you my JBL4355 replica, from Italy!

    first of all this is a really expensive project, and it's really difficult to find components in good condition...
    I was coming from a Setup build up with JBL4560 with Altec 416-8A and 2441 in 2350 plus fostex Ft65h (i'm still owner of box and horn )
    so...2441 was present...lets start.

    I decided since beginning to avoid a FULL replica with Classic blue and classic walnut veneer, not because i don't like, but to avoid drastic mistakes and reduce a bit enclosure cost (i'm not expert in veneer and i've no skills to do it). A carpenteer friend of mine help me in the construction than i'm finishing in house the internal furniture.

    we used 24mm birch (really heavy strong and dense) for full structure, at the end is something like double the weight and rigidity of a normal playwood (a 24mm thickness count something like 14-16 layers)

    we decided for a removable back to help working inside, maybe later on, this back panel will be fixed and glued together with the box, let see how it sound...

    I decided to try with a normal filtering without Charge coupled variant, but i will try also the equivalent schematic simulating the autotrasformer.
    I Re-use some material coming from previous setup, so expense was not huge, and i'm also thinking to try a full passive variant.

    for the moment I just found an UREI 5235 and I'm going to build 290hz 18db board for him.

    I'll start with a couple of UCD400H&R for woofers and MC2120 alternate with Uesugi 211 tube amplifier for mid-high.

    At the moment I miss 4-2235h, I found them in USA but I'm thinking about the huge expense to bring them to Italy (i just bought a mint 2202h couple from USA...sigh!) but I have 4 E140 basket empty and 4 2226h that i want to try (setting the tune to 35hz), simulation show not far away response, even if i suppose 2235 sound far much lower and better (maybe)...

    so, come on and Kill me with suggestions/opinions!
    Name:  01_front panel painted.JPG
Views: 3695
Size:  230.3 KBName:  02_A_rear connector panel.JPG
Views: 3442
Size:  204.1 KBName:  02_back removable.JPG
Views: 3471
Size:  216.6 KBName:  03_internal progress.JPG
Views: 3417
Size:  211.7 KBName:  04_rear view_missing fixingpoint.JPG
Views: 3398
Size:  207.3 KB

  2. #2
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    more...
    Name:  05_inside progress.JPG
Views: 3388
Size:  230.7 KBName:  06_first trial mount.JPG
Views: 3301
Size:  223.9 KBName:  06_rawbox finish.JPG
Views: 3314
Size:  113.3 KBName:  07_2441_supportPreparation.jpg
Views: 3261
Size:  159.9 KBName:  08_2202_cabling.jpg
Views: 3168
Size:  163.6 KB

  3. #3
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    againName:  09_RearBraceBackopen.jpg
Views: 3340
Size:  174.3 KBName:  10_front drilled.jpg
Views: 3312
Size:  57.4 KBName:  11_internalbrace.jpg
Views: 3317
Size:  60.5 KBName:  12_internalBracingPrep.jpg
Views: 3292
Size:  166.6 KBName:  13_internalbracing3.jpg
Views: 3348
Size:  200.4 KB

  4. #4
    Senior Member
    Join Date
    May 2016
    Location
    Danmark
    Posts
    123
    Hello

    Can you tell me what the original purpose of the metal internal support bracket?

    thanks



    Quote Originally Posted by berga12 View Post
    againName:  09_RearBraceBackopen.jpg
Views: 3340
Size:  174.3 KBName:  10_front drilled.jpg
Views: 3312
Size:  57.4 KBName:  11_internalbrace.jpg
Views: 3317
Size:  60.5 KBName:  12_internalBracingPrep.jpg
Views: 3292
Size:  166.6 KBName:  13_internalbracing3.jpg
Views: 3348
Size:  200.4 KB

  5. #5
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    Name:  14_Dampingprogress2.jpg
Views: 3182
Size:  181.1 KBName:  15_Dampingprogress_40mmDacron.jpg
Views: 3174
Size:  183.3 KBName:  16_2202_internalcable2.jpg
Views: 3136
Size:  151.3 KBName:  17_mint2202h_fromUSA.jpg
Views: 3154
Size:  159.8 KBName:  18_mintOriginal2202h_fromUSA.jpg
Views: 3117
Size:  237.0 KB

  6. #6
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    Just checked schematics, right all reversed.

    also woofer? mean, ok they are in parallel, but i will also use the negative as a positive? (as i know JBL winding is reversed itself...?)

  7. #7
    Senior Member
    Join Date
    Jul 2013
    Location
    Ca
    Posts
    493
    Quote Originally Posted by berga12 View Post
    Just checked schematics, right all reversed.

    also woofer? mean, ok they are in parallel, but i will also use the negative as a positive? (as i know JBL winding is reversed itself...?)

    Yep! Same thing!
    Attached Images Attached Images  

  8. #8
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    grills assembly

    Name:  31_grill mount.jpg
Views: 2010
Size:  209.0 KBName:  31B_Grill_mount.jpg
Views: 1756
Size:  225.8 KB

  9. #9
    Senior Member
    Join Date
    Jul 2013
    Location
    Ca
    Posts
    493
    Quote Originally Posted by berga12 View Post
    grills assembly

    Name:  31_grill mount.jpg
Views: 2010
Size:  209.0 KBName:  31B_Grill_mount.jpg
Views: 1756
Size:  225.8 KB

    Very nice!
    Your screws are in the envelop and ready to go!
    I'll let you know when posted from Spain!
    Cheers!
    C

  10. #10
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    3,095
    Those look great!

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  11. #11
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221

    filter

    Below one filter, not yet finish!
    bypass cap are missing, Neutrik connector and IN-OUT cable,and Autotrasformer for 2441!


    Name:  30_filtri4355_2.jpeg
Views: 2049
Size:  223.2 KB

  12. #12
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    Small progress....this weekend I should mount the drivers and make the first trial!

    Name:  35_rearconnector_label.jpg
Views: 1632
Size:  216.2 KBName:  34A_grillsmounted.jpg
Views: 1599
Size:  182.4 KBName:  34_grillsmounted.jpg
Views: 1642
Size:  208.1 KBName:  33A_topgrill.jpg
Views: 1643
Size:  163.8 KBName:  33_top grill.jpg
Views: 1568
Size:  166.3 KB

  13. #13
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    And finally assembled! Now I've to switch them On!

    in the meantime I'm preparing 2235h woofer, but final simulation shorws not that less with 2226, for sure faster and with more punch, but less below 35hz compared to 2235 and less flat response (but they sound good)

    Name:  39_finalmount2_red.jpg
Views: 1846
Size:  83.1 KBName:  39_finalmount_red.jpg
Views: 1497
Size:  82.0 KBName:  2226vs2235h_280lt.jpg
Views: 1433
Size:  119.3 KB

  14. #14
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    I found nice 077 Alnico, so i will go with them...

    2405 i've on a pair of JBL4315 original, also Alnico version but yellw diaphagram, i suppose they sound similar.


    Name:  19_Internalcable_1_3mmq_teflon_copperOFC_silver_milspec.jpg
Views: 3204
Size:  232.6 KBName:  20_GiantAndBaby_4311Bstock.jpg
Views: 3181
Size:  204.5 KBName:  21_cableandDacronfinish.jpg
Views: 3259
Size:  172.0 KBName:  077.jpg
Views: 3135
Size:  282.8 KBName:  077_2.jpg
Views: 3203
Size:  200.9 KB

  15. #15
    Senior Member
    Join Date
    Jul 2013
    Location
    Ca
    Posts
    493

    WOW!

    Very Very nice!!!

    If I may, If it's not too late! I would use a bigger gauge for the wiring.
    And I would make sure that the back panel is very well attached to the back of the 2202 chamber.
    Vibration from the bass could give you some parasite sound.

    I want to build an other pair...
    C

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. JBL 4530 Replica
    By JR.junior in forum Lansing Product DIY Forum
    Replies: 6
    Last Post: 10-12-2010, 07:34 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
  •