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  1. Replies
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    I think you will find The Widget is correct. ...

    I think you will find The Widget is correct.

    It’s more about the manufacturing process, tooling and labour involved to the create what these vintage drivers were back in the day. Do you know the...
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    Those were the days. I think l first heard a...

    Those were the days.

    I think l first heard a Jbl factory system at Encelís HiFi in Bridge Road Richmond. I initially heard the 4315ís around 1976.
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    Hi Derek, If you can arrange a 30 hertz sine...

    Hi Derek,

    If you can arrange a 30 hertz sine wave into the loudspeaker then run your hand around the enclosure to feel for leaks. That will identify any issues normally.

    You can download an App...
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    Try the 2123H with the 4344mk11 mid filter...

    Try the 2123H with the 4344mk11 mid filter schematic.

    Any other mid drivers will require the crossover reworked.
  5. Hi Phil, Its possible there is corrosion...

    Hi Phil,

    Its possible there is corrosion around the diaphragm screw down contacts in the faulty driver and or debris in the gap. When you get time have a look. The diaphragm may also require...
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    Without a pic itís hard to know. Btw adding a...

    Without a pic itís hard to know.

    Btw adding a sub into the system might be a good idea when you want to turn it up and cross the L150ís at a point that lowers the excursion on the woofers.
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    Hi Derek, As Chris points out have the passive...

    Hi Derek,

    As Chris points out have the passive radiator and the driver checked out.

    Itís possible that the system is being over driven or that the passive radiator is not loading the woofer...
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    Excellent

    Excellent
  9. Replies
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    I agree. However the manner in which those soa...

    I agree. However the manner in which those soa drivers to sing together in JBLs systems calls for some ownership on the part of user as to how they set up and listen to these systems.

    I can...
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    Hi Martin, I don't see the necessity to...

    Hi Martin,

    I don't see the necessity to consider exotic driver (which are now NLA anyway)

    Consider this relatively cost effective arrangement which would go some way to mitigating the concerns:...
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    Thanks for the link, I had thought about...

    Thanks for the link,

    I had thought about getting a local shop to make them. With the current exchange rate they would be reasonable at your end.
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    That was 15 years ago and the rest is history....

    That was 15 years ago and the rest is history. Most of us have gotten old..LOL
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    There are several take outs at this point from...

    There are several take outs at this point from this discussion;

    1. Is the 4 way dead in the context of JBL? - original post
    2. Is a 4 way system featuring a specialised 10 inch mid or mid bass...
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    Hi Dome, I heard a similar style of system in...

    Hi Dome,

    I heard a similar style of system in HK recently which was a bi amped pair of DD67000 flanked by dual Wilson subs. It was a cool setup and was likened to listening to giant headphones...
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    Hi Widget, Time for project May mk2😀. Looks...

    Hi Widget,

    Time for project May mk2😀.
    Looks like a club system on steroids.
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    Hi Ari, I have provided an explanation on...

    Hi Ari,

    I have provided an explanation on JBLís prior 4 way offerings and the recent SOA systems.

    We can speculate on why there are no ďcurrentĒ 4 way market offerings but we may never know the...
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    Back to the topic if you want understand the...

    Back to the topic if you want understand the ďwhyĒ on JBLís path of contemporary 3 way system it boils down to the intended listeners. The Japanese audiophiles. These systems are designed and voiced...
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    Not an appropriate comparison. I am wondering...

    Not an appropriate comparison.

    I am wondering how you access these forums?
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    A diy project always sounds better ⛏😀

    A diy project always sounds better ⛏😀
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    Low frequency Linearity of a 4 way is always...

    Low frequency Linearity of a 4 way is always positive if thats what the markets wants.

    in Japan there is a strong legacy following of the blue baffle systems that goes all the way back to the 43xx...
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    An individuals opinion having listened to a...

    An individuals opinion having listened to a product is what this hobby is largely about. Not an opinion based an anotherís opinion.

    From an industry perspective the problem we find with forums is...
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    As l said earlier check the system response data...

    As l said earlier check the system response data sheets.

    In this instance l preferred the 4338. I donít need to justify my preferences but l do trust my ears.
    Just because the business put out a...
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    Have a look in the systems technical forum on the...

    Have a look in the systems technical forum on the 4348.

    On axis it was hot �� in the upper midrange but was smoother overall off axis.
    In comparison the 4338 is way better behaved.
    Had l have...
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    If you read the History of JBL article the...

    If you read the History of JBL article the reasons, the whyís and whereforeís are spelt out.

    The 4 way monitor thing was a marketing decision and started with the 4350. The design paved the way...
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    I didnít like the small horns in the 4348.

    I didnít like the small horns in the 4348.
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