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Thread: JBL L15 Refurbish

  1. #1
    Member Pigboat's Avatar
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    JBL L15 Refurbish

    Hi All

    Help with L15 Refurbish
    1) Cabinets, dampening, leave it, add to it, remove/replace it ????
    2) 034 Tweeter has lost it's silver paint/aluminum? covering, works, replace, repaint ??
    3) Crossover, Cap replacement suggestions
    Change inductors to air ?
    Change resistors ?
    Build external "charged xover" ?
    Change xover frequency to 3K(read somewhere?)
    4) Change connectors
    And anything that will help with project.
    Not worried about keeping original.
    Just having FUN.
    Pair of 4406's after these.

    Thanks
    Pigboat
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  2. #2
    Administrator Mr. Widget's Avatar
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    You don’t mention the woofers. Are they original? What is the condition of their surrounds.


    Widget

  3. #3
    Senior Member Chris Brown's Avatar
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    Some thoughts on the 034. I'm not sure I've ever seen the inside of an L15 before. I am somewhat surprised that the tweeter is not in it's own sealed chamber. The 034 has an "issue" where it's fragile plastic frame will allow the entire tweeter (not just the dome) to vibrate like a passive radiator during heavy bass due to the internal cabinet pressure. This is why it's listed as being "not safe" for use in the L110 and L110A and it's even worse when used in the L150, despite being a direct fit/replacement for the 033 that those speakers use. Maybe it's simply that the woofer is so tiny in the L15 that it does not create enough internal cabinet pressure to be an issue. It's a great tweeter though. I have a pair that I got cheap years back to try in my L150s, and my backup plan should my 033s ever die is to create my own sealed chamber for the 034s somehow so that I can make them work. In your particular case, I have to wonder exactly what happened to them that caused them to have all of their aluminum worn off. I believe the aluminum was "Vapor deposited" originally, not sure if it's something you can simply repaint. Take solace knowing that similar tweeters such as the 033 still sound fantastic despite never having the aluminum coating in the first place

  4. #4
    Senior Member rdgrimes's Avatar
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    IMO you will spend your time and money better by moving on to one of the later 6" 2-way models. The L15 just isn't very good, and yes the low crossover point is part of the reason. Pretty much any of the "ti" or "L" series 6" models or even the later S26 are all better speakers. And don't forget the 4406 and similar pro models.

  5. #5
    Member Pigboat's Avatar
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    JBL L15 Refurbish

    On L15's
    Only one tweeter was in that condition. Audio out of both sounded identical. Ohm out the same.
    Drivers are pristine.

    Next pair "is" a set of 4406's
    Both 035 tweeters have open voice coils to be replaced.
    Drivers are nice. Cabinets very nice.

    Just passed on a set of Pristine L166's to a new home.
    That was a killer "L" Series. Should have kept those.

    There's a set of L100's close for $800.
    Working a trade on those right now.
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  6. #6
    Member Pigboat's Avatar
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    JBL L15 Refurbish

    Hi All
    I expected all "little" more project feedback.
    So, step right up.
    Purchased from Goodwill $24.99 - 50%
    Same deal on 4406's $49.99 - 35%

    Small room, so the idea is to use 5, 4406's as surrounds/center,
    have 3,as their near-field, if I'm correct. ??
    Fronts will be my Klipsch RF-7's, add "BEAST" sub, all set.

    RF7's main listening,to be replaced with L100's, In the works.
    Hoping L100's are better than L166's I just sold.
    Loved those 166's
    Sorry off track. Retired

    Two more questions
    1) Tweeter cages, wouldn't they cause sound wave dispersion issues,
    also some mechanical vibration transfer to tweeter, so, remove ?
    2) Isolate tweeter somewhat ?

    Is this the right area of the Forum, for these questions ?

    Thanks

  7. #7
    Member Pigboat's Avatar
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    JBL L15 Refurbish " Tweeters "

    Quote Originally Posted by Mr. Widget View Post
    You don’t mention the woofers. Are they original? What is the condition of their surrounds.


    Widget
    Nice woofers, surprisingly.

    Hi, see new on tweeters ? Thoughts ?

    Any other thoughts on project ?

    Read profile.San Fran(sell you a pooper scooper )Are you the 1 in 11?
    Lived in, Piedmont 1954, Oakland 1958 and Walnut Creek (Pleasant Hill High)1967 to 69. Military brat
    Great Times,16 years old, every weekend either Fillmore West, or Winterland. Unbelievable!
    Then boot camp San Diego. Party Over, life's reality starts.

    Thanks for feedback

    Pigboat

  8. #8
    Senior Member SEAWOLF97's Avatar
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    Quote Originally Posted by Pigboat View Post
    .
    Hoping L100's are better than L166's I just sold.
    Loved those 166's
    not ..IMHO

    120Ti's better than either.
    “If you think that’s the dumbest thing you’ve ever heard,
    just wait a couple minutes!”

  9. #9
    Member Pigboat's Avatar
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    JBL L15 Refurbish

    Quote Originally Posted by SEAWOLF97 View Post
    not ..IMHO

    120Ti's better than either.
    Thanks for thoughts
    Preferred JBL 2-way?
    I have L15, and 4406's

    Bottom end of those L166's was fantastic.
    Worked great with,
    Adcom GFA555
    Adcom GFP565
    Thorens TD160/Shure V15III

    Also "Seawolf", you ride on boats ???
    Pigboat STS2/SS USS WillRogers SSBN659G 69/75

  10. #10
    Senior Member SEAWOLF97's Avatar
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    Quote Originally Posted by Pigboat View Post
    Thanks for thoughts
    Preferred JBL 2-way?
    I have L15, and 4406's

    Bottom end of those L166's was fantastic.
    Worked great with,
    Adcom GFA555
    Adcom GFP565
    Thorens TD160/Shure V15III

    Also "Seawolf", you ride on boats ???
    Pigboat STS2/SS USS WillRogers SSBN659G 69/75
    was a "CTI" then a "PH"

    VP69 (Whidbey Island) 72-74(P2-V Neptunes)
    CVA-64 (Connie) 71-72 (floating city)
    HA(L)-3 (UH1b's-Hueys) 70
    NSA - Da Nang 69-70 (m151a1)
    DLIWC - Monterey -68/69

    also have Adcom GFA555 with GTP500-2 & couple of V15-3,-4,-5's

    2 ways ? liked L-19, L-16,L-26,L-88 ..have a near mint pr, L-15 right now.
    best 2 way I've ever heard/owned was ESS AMT-10b.

    SSBN659G 69/75
    remember Zooomie ? (CNO) ..hung out with him for a day - 72

    best sub flick ? Crimson Tide
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    “If you think that’s the dumbest thing you’ve ever heard,
    just wait a couple minutes!”

  11. #11
    Member Pigboat's Avatar
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    Quote Originally Posted by SEAWOLF97 View Post
    VP69 (Whidbey Island) 72-74
    CVA-64 (Connie) 71-72
    HA(L)-3 (UH1b's-Hueys) 70
    NSA - Da Nang 69-70
    DLIWC - Monterey -68/69

    also have Adcom GFA555 with GTP500-2 & couple of V15-3,-4,-5's

    2 ways ? liked L-19, L-16,L-26,L-88 .. best 2 way I've ever heard/owned was ESS AMT-10b.

    best sub flick ? Crimson Tide
    Actually, The Enemy Below

    Hueys, I prefer 7 blades under, never 2 blades over.

    Monterey Monterey International Pop Music Festival June 16 to June 18, 1967
    I mover to Walnut Creek 67/69 16 yo Great times Fillmore West and Winterland .
    Inducted in Oakland 69. boot San Diego. Party over
    Dad AF Lifer, Me brat

    ESS AMT-10b.



    ESS AMT 1B Speakers

    $2,199.00
    Free local pickupor Best Offer
    Free Returns
    100 Watchin

    HOLY #*!+%#





  12. #12
    Senior Member SEAWOLF97's Avatar
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    Quote Originally Posted by Pigboat View Post
    Monterey Monterey International Pop Music Festival June 16 to June 18, 1967
    I mover to Walnut Creek 67/69 16 yo Great times Fillmore West and Winterland .
    Inducted in Oakland 69. boot San Diego. Party over
    Dad AF Lifer, Me brat

    ESS AMT-10b.


    HOLY #*!+%#
    nope, not 1b's ..10b's. 2 way bookshelf.

    DLIWC Monterey ..on the hill , just above Fisherman's Wharf, can see Cannery Row.

    Boot also NTC Sandy Eggo. Grew up as a Santa Barbarian, inducted LA.

    Did see CCR, Animals, Canned Heat ..etc @ Pleasanton Horse Track - near SF
    Ravi Shankar too (SF area). Joni Mitchell - Big Sur = all 1968

    Quote Originally Posted by SEAWOLF97 View Post
    VP69 (Whidbey Island) 72-74(P2-V Neptunes)
    hunting subs - theirs, not ours.
    “If you think that’s the dumbest thing you’ve ever heard,
    just wait a couple minutes!”

  13. #13
    Member Pigboat's Avatar
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    Quote Originally Posted by SEAWOLF97 View Post
    nope, not 1b's ..10b's. 2 way bookshelf.
    DLIWC Monterey ..on the hill , just above Fisherman's Wharf, can see Cannery Row.

    Boot also NTC Sandy Eggo. Grew up as a Santa Barbarian, inducted LA.

    Did see CCR, Animals, Canned Heat ..etc @ Pleasanton Horse Track - near SF
    Ravi Shankar too (SF area). Joni Mitchell - Big Sur = all 1968

    Santa Barbarian= Silver Spoon Surfer Dudes&HOT Chicks

    Did I see you at Altimont ?
    Great Times

    Just did road trip last year Convertible Top down 17k miles
    FLORIDA to SD, up to Washington,down to Vagas, up to Dakotas, over to Maine, down to Key West,
    and everywhere in between.SD or all of West Coast kinda changed.

  14. #14
    Member Pigboat's Avatar
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    Quote Originally Posted by Pigboat View Post
    Santa Barbarian= Silver Spoon Surfer Dudes&HOT Chicks

    Did I see you at Altimont ?
    Great Times

    Just did road trip last year Convertible Top down 17k miles
    FLORIDA to SD, up to Washington,down to Vagas, up to Dakotas, over to Maine, down to Key West,
    and everywhere in between.SD or all of West Coast kinda changed.
    Avatar is me looking at you, 1972, inside sonar shack, 40+ days on patrol
    Nice hair and sideburns, thanks Zumwalt

  15. #15
    Senior Member SEAWOLF97's Avatar
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    Quote Originally Posted by Pigboat View Post
    Santa Barbarian= Silver Spoon Surfer Dudes&HOT Chicks

    Just did road trip last year Convertible Top down 17k miles
    FLORIDA to SD, up to Washington,down to Vagas, up to Dakotas, over to Maine, down to Key West,
    and everywhere in between.SD or all of West Coast kinda changed.
    >>Santa Barbarian= Silver Spoon Surfer Dudes&HOT Chicks ...yes & yes2

    When resided in LA, summers were in Carpenteria. Would love to live there now.

    labor day 1972 ... in my MGB roadster , raced a Dat2000 from BigSur to SLO on Hwy1 ...both full bore for 100 miles. Fantastic drive ... sunburned to a crisp, but good times.

    Now, cycling is more fun for me.
    “If you think that’s the dumbest thing you’ve ever heard,
    just wait a couple minutes!”

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