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Thread: 4365 has quality problems

  1. #31
    Senior Member martin_wu99's Avatar
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    Quote Originally Posted by Mctwins View Post
    In the first picture where one can see the cable(negative wire) there is a faston connection. Can this be right, I thought it schould be soldered. The tiny cables looks strange as well, compare to some pictures I have seen, more of a flat cable and solder too.

    When you are saying "they said thses problems are very common in 4365." who is they?

    The trancducers must have been in some moisture enviroment for some time. Just my guess.
    Another 4365 users,many of them live in south of China,relatively hot and humid,but they treat their 4365 very carefully.
    46 lover

  2. #32
    Senior Member Mctwins's Avatar
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    Quote Originally Posted by martin_wu99 View Post
    Another 4365 usres,many of them live in south of China,relatively hot and humid,but they treat their 4365 very carefully.
    Ok, understand

    What about the wire cable?

  3. #33
    Senior Member Mctwins's Avatar
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    In the picture from hifishock posted by Earl k the text on the tranceducer is differen't from martin wu's picture.

  4. #34
    Senior Member martin_wu99's Avatar
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    Quote Originally Posted by Mctwins View Post
    Ok, understand

    What about the wire cable?
    They are original 4365,no one touch the cable.
    46 lover

  5. #35
    Senior Member martin_wu99's Avatar
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    Quote Originally Posted by Mctwins View Post
    In the picture from hifishock posted by Earl k the text on the tranceducer is differen't from martin wu's picture.
    I noticed that the pixes are of 9900,maybe that's the point!JBL changed something later.
    I have no 4365,let Bubbleboy76 give you the details.
    46 lover

  6. #36
    Senior Member Mctwins's Avatar
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    Quote Originally Posted by martin_wu99 View Post
    They are original 4365,no one touch the cable.
    Ok, I do belive you, But, that cable can't be made from factory. Looks strange, I would be very suspicious.

  7. #37
    Senior Member baldrick's Avatar
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    Have anyone removed a driver from 4365, and if so, how is it done?

  8. #38
    Senior Member Mctwins's Avatar
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    Quote Originally Posted by baldrick View Post
    Have anyone removed a driver from 4365, and if so, how is it done?
    Remove the back access panel.

    Disconnect the wires.

    There are two screws on the horn and two on the bottom where the L-shape plate is. Remove this. Take care of the gasket.

    Remove all this, L-plate and the tweeter.

    Then there are for bolts on the tweeter where the L-plate is attached, remove this and you have the 476mg free to dismantle.

    Look for technical manual of 4365.

    Hops this helps.

  9. #39
    Senior Member baldrick's Avatar
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    Thank you Mctwins!

  10. #40
    Senior Member Ian Mackenzie's Avatar
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    It could be a cleaning solvent residue or a metallurgy problem with the enamel or other coatings, adhesives used on the voice coil or the glues used to bond the voice coil to the diaphragm. If the acquaplas is effected then it could be vapours from adhesives. Sounds like a problem in production (Mexico) if itís not an isolated case.

    I recommend you talk to a JBL consumer or the reseller you acquire the 4365ís from.

  11. #41
    Senior Member martin_wu99's Avatar
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    Quote Originally Posted by Ian Mackenzie View Post
    It could be a cleaning solvent residue or a metallurgy problem with the enamel or other coatings, adhesives used on the voice coil or the glues used to bond the voice coil to the diaphragm. If the acquaplas is effected then it could be vapours from adhesives. Sounds like a problem in production (Mexico) if it’s not an isolated case.

    I recommend you talk to a JBL consumer or the reseller you acquire the 4365’s from.
    One of the 4365 user contact the reseller,the reseller promise to repair,but need the whole speaker to be transported to the store
    46 lover

  12. #42
    Senior Member Ian Mackenzie's Avatar
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    Of course.

    The think is why did the owner not take the loudspeakers into the reseller in the first instance.

    Because he had tampered with the loudspeakers it may not be covered under warranty.

    Itís like lifting the lid on an amplifier because you think there is a problem with it?

    Can he prove a difference in sensitivity and that this is the cause?

    I am not sure cynical (miss trust) publicity is appropriate unless the business can confirm what the issue is and if it is the actual cause as alleged.

  13. #43
    Senior Member edgewound's Avatar
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    Quote Originally Posted by martin_wu99 View Post
    Another 4365 users,many of them live in south of China,relatively hot and humid,but they treat their 4365 very carefully.
    Very moist air is not compatible with compression drivers. The patterns on the phase plug side of the diaphragm is typical of moisture entering the horn throat.

    A dehumidifier might help in the room where the speakers live. A piece of open cell foam over the compression driver exit might also help reduce moisture entering the internals of the driver.
    Edgewound...JBL Pro Authorized...since 1988
    Upland Loudspeaker Service, Upland, CA

  14. #44
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    Some pics of mine 476mg. The speakers were bought brand new Des 2011. My listening room have a steady temp around 20-22˚celsius.
    Attached Images Attached Images    

  15. #45
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    The sound is as always very very good.
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