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  1. #16
    Member Mitchco's Avatar
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    Not the same JBL's but I run 4722 Cinema speakers using a digital active crossover. What are you using as a music source? Is there a computer involved? If so, you may be interested in going digital XO. A bit of a primer here: http://www.acourate.com/XOWhitePaper.pdf A much more detailed response is in my sig.

    Another member here, pos, has developed software that can also generate digital XO's: https://sourceforge.net/projects/rephase/

  2. #17
    Senior Member pos's Avatar
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    Hello Pigboat,

    I am no expert, especially with things like cabinet construction/refurbishing and passive crossovers, and I don't own any of these speakers.
    I also have no daughter, so take my opinions with a grain of salt, but here is what I would gather from what I read around here among the years.

    Quote Originally Posted by Pigboat View Post
    This was from L36,
    1 Notice glue was around pots only on xovers just, pry around that area to release?
    2 changing out with 035ti's?
    3 changes to damping?
    4 F ing with port?
    5 xover? Rebuilding? Removing pots from system? Active?
    6 connectors?

    1: leave it alone unless you hear or see problems
    2: no need unless a problem occurs, and probably not beneficial without a crossover modification (measurement, simulation, etc.). If the 035 was cited as a replacement part by JBL that probably just indicates that the original driver was NLA at the time and the 035 was a sub optimal solution (NLA as well these days)
    3: No
    4: No
    5: rebuilding is probably overkill but you could replace the caps and pots. Zilch posts come to mind for more info
    6: you can clean them if they are oxidised, and replace them if you need to install bigger wires and/or different types of connectors
    Quote Originally Posted by Pigboat View Post
    This JBL L15 Refurbish Hi Happy 4th Came across this thread
    Any thoughts ?

    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.
    1: leave it alone
    2: any covering would probably alter the weight and overall behavior more than the original one, or its absence
    3:
    caps: any good cap that fits and is in your budget. Parts express has all the majors brands, along with opinions
    inductors: no reason to change (does not wear), and changing them would alter resistance and change xover behavior
    resistors: no reason to change (does not wear)
    charge coupled: probably overkill, but member 4313B did it (and posted a dedicated thread about it) with similar sized speakers, apparently with great success.
    change xover fc: why?
    4: parts express

    Any of the speakers in your list would probably call for the same answers.
    All the info you seem to look for is already on these forums, you just need to search for it (possibly using google with a site:audioheritage.org query), and discover new things along the way

    hope this helps

  3. #18
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    Quote Originally Posted by Ed Kreamer View Post
    Me???? Smell like diesel oil???? It was fun hearing all four of those Fairbanks Morse light off on the surface and start pulling in fresh air.

    After a patrol we"d hit the showers for as long as it took, and could practically see the stuff running off us.

    Atlantic or Pacific?

    S/Wine/ Classical Music
    First, I apologize for another derailment. OP-38s? How many cylinders? Question from an X-Birdfarmer. OP-38s used in the carrier, The FDR, back up generator room.

  4. #19
    Member Pigboat's Avatar
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    Clones

    Quote Originally Posted by pos View Post
    Fortunately science is moving forward: these days you can already clone better versions of two items in that list
    Like These
    Attached Images Attached Images  

  5. #20
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    Colleagues,

    Sorry about the derailment, Mia Culpa. This will be my last addition to that: The motors were 10 cylinders opposed. On 22 Feb 1967, instead of breathing the fresh air of freedom I spent the the next 10 years trying to ruin my health, mentally and physically. It took a good woman and the threat of going to jail to wake me up. Because of this poor behavior, my memories of the 60's and 70's are at best misfiled. Not exactly proud of this but there it is.

    I got lost on a carrier once at Hunters Point.

    Now back to JBL/ Altec stuff.
    Sawdust is my co-pilot

  6. #21
    Senior Member SEAWOLF97's Avatar
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    Quote Originally Posted by Ed Kreamer View Post
    Colleagues,

    Sorry about the derailment, Mia Culpa. .
    Ed ... sometimes the OT posts are the most enlightening

    Quote Originally Posted by Ed Kreamer View Post
    On 22 Feb 1967, instead of breathing the fresh air of freedom I spent the the next 10 years trying to ruin my health, mentally and physically. It took a good woman
    I only spent 6 years trying (68-75).... have had a wonderful woman change my life since 1972.

    Quote Originally Posted by Ed Kreamer View Post
    I got lost on a carrier once at Hunters Point.
    My last duty station was aboard a carrier (CVA-64) . Even after 18 months on "Connie", I would still get lost, daily.

    I'd get a call "accident on deck 7-frame 12 (or some such) , grab a camera" ..go do to deck 7 .. well you can't get to frame 12 from where you are, go up to deck 4, cross to frame 19, then all they way down to deck 8, then up to 7, back to 32, take a port turn and follow up to 12, good luck retracing to get back". so many voids & dead ends

    (but I cheated when going back to my rack, took the pilots escalator up to the second and then down to the third where I lived)

    -deck numbers changed to protect the innocent-




    oh wait, there were no innocents...
    “If you think that’s the dumbest thing you’ve ever heard,
    just wait a couple minutes!”

  7. #22
    Member Pigboat's Avatar
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    Thank You

    Quote Originally Posted by Mr. Widget View Post
    Perhaps there are others like me who have nothing constructive to offer



    Widget
    As I Travel through these Forums, I find a LOT of that(Like BMWCCA)
    With "nothing constructive" trying to be, and injecting. Does not help.
    Chris Brown's post was the exception Thanks Chris, as was Don C.
    Thanks DC

    Thank You Mr Administrator
    Didn't set out to shit on your porch, as you have enough of that in SF now.
    Lived in area 1955/1959/1967-69 and dropped by last year for 3 days.
    Many nights at Filmore West and Winterland.

    Because of $$$$$$$ involved, these forums turn into
    Who's got the Biggest Dick.
    My Dick is bigger than yours.
    No help with L15's but my 4345's...Who gives A.

    Realizing my search habits are misguided, as I just ask questions, usually after frustrating searches.
    For which I get this Condescending quote,
    "All the info you seem to look for is already on these forums, you just need to search for it (possibly using google with a site:audioheritage.org query), and discover new things along the way"
    Lot of NEW to forum, get turned off by this. If you have knowledge provide such knowledge,

    Or be like my MOM, "Go Look It Up Yourself.


    So search this site
    L-15,
    Sorry - no matches. Please try some different terms.
    L36 Sorry - no matches. Please try some different terms.
    4311 Sorry - no matches. Please try some different terms.
    I Guess I need to be REALLY specific, and use diff terms, such as
    Has anybody changed the Xover point on L15's from 2.5K to 3K?
    and if so what cap values used? And thoughts on results.

    But not the point
    It took a post, that was not really positive, or not tasteful in some opinions,
    to generate a semi helpful, curt response. Granted by this time I may have deserved it.
    My observation has been, Audiophiles are Prudes, usually old and prosperous.
    This Cult of is detrimental to the New Individuals, stepping in to the Litter Box.
    As I've gotten older, I can see the veins in my arms.
    Must mean my skin is not as thick as it used to be.

    Apologize for what has offender, and for those who deserve it.
    Will continue to look for knowledge on site, and cull some friends
    who like sea stories, who have walked the walk, and enjoy the music.
    I see updates so will hop back into the Litter Box
    Will try not to be a "curmudgeon" LMFAO

  8. #23
    Member Pigboat's Avatar
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    Quote Originally Posted by Mitchco View Post
    Not the same JBL's but I run 4722 Cinema speakers using a digital active crossover. What are you using as a music source? Is there a computer involved? If so, you may be interested in going digital XO. A bit of a primer here: http://www.acourate.com/XOWhitePaper.pdf A much more detailed response is in my sig.

    Another member here, pos, has developed software that can also generate digital XO's: https://sourceforge.net/projects/rephase/
    Why thank you.
    Nice Avatar Year ?

    My source both analog and digital. Will look into that aspect for Xovers
    Would be a lot easier to cut out the middle man(physical XO).

    Thanks for constructive input.
    Refreshing.

  9. #24
    Member Pigboat's Avatar
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    Quote Originally Posted by Ed Kreamer View Post
    Colleagues,

    Sorry about the derailment, Mia Culpa. This will be my last addition to that: The motors were 10 cylinders opposed. On 22 Feb 1967, instead of breathing the fresh air of freedom I spent the the next 10 years trying to ruin my health, mentally and physically. It took a good woman and the threat of going to jail to wake me up. Because of this poor behavior, my memories of the 60's and 70's are at best misfiled. Not exactly proud of this but there it is.

    I got lost on a carrier once at Hunters Point.

    Now back to JBL/ Altec stuff.
    I got lost for 3 months when they threw me down the hatch into AMR-1
    Maybe it was no sleep for 3 months
    Got lost on tender looking for GeDunk stand

  10. #25
    Member Pigboat's Avatar
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    That Smell

    Quote Originally Posted by johnlcnm View Post
    First, I apologize for another derailment. OP-38s? How many cylinders? Question from an X-Birdfarmer. OP-38s used in the carrier, The FDR, back up generator room.

    Fairbanks-Morse 38 8-1/8
    AMR2 aft of Reactor Compartment.
    Reactor Backup, in case of SCRAM
    Used for propulsion and as Diesel Generator

    Qualification Question:

    You are a drop of diesel fuel on the pier.
    Make it turn on your bunk light.
    or
    Your the Core in the Reactor,
    Make the propeller turn.

    And not just talk,
    You had to walk it through.

    FDR Floating City. BIG Target

    Sub Sailors Go DEEPER Stay LONGER

  11. #26
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    Box Sound Damping. The JBL boxes I have seen use damping sparingly. Usually two inches thick on back and sides. None on the front. The idea is to keep the box Q as high as possible. The T/S base alignment is usually done using a box Q of 7 for small boxes and a Q of 5 for the larger boxes. Look for 2 inch stabilized fiber glass with no backing. The big box stores usually sell it in small rolls for door and window installs.

  12. #27
    Senior Member pos's Avatar
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    Quote Originally Posted by Pigboat View Post
    So search this site
    L-15,
    Sorry - no matches. Please try some different terms.
    L36 Sorry - no matches. Please try some different terms.
    4311 Sorry - no matches. Please try some different terms.
    The forum search engine has its limits, but as explained in my post above (#17, did you actually see it ?..) you can use google (and google image) for a site-specific search.

  13. #28
    Member Pigboat's Avatar
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    Yes

    Quote Originally Posted by pos View Post
    The forum search engine has its limits, but as explained in my post above (#17, did you actually see it ?..) you can use google (and google image) for a site-specific search.
    Love you technical advice.Yes No MaybeWhy (#17, did you actually see it ?..) YesThanks for the helpHave a nice day

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