Jupiter Audio Research (JAR650, JAR600)

Discussion in 'Product Announcements' started by ext1, Jul 30, 2020.

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  1. ext1

    ext1 MOT: JAR650

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    I think so. It's interesting to note that I have seen these in old 580s and 600s, not yet in 650s. I also haven't seen yet old 580s and 600s without these. I probably haven't bought enough yet to find out.
     
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  2. E_Schaaf

    E_Schaaf MOT: E.T.A Headphones

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    How'd you manage to remove the magnets without destroying the voice coil? Always wanted to roll an N52 or Alnico 5 in there.
     
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  3. YMO

    YMO Friend

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    Take your time @ext1.
     
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  4. ext1

    ext1 MOT: JAR650

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    I wish I can show you - but basically there are two ways, on the modern ones the magnet is really loose or not so tight so if you just insert a tiny hex screwdriver in the hole and push upwards it does the trick. Wiha screwdrivers are awesome because the surface is smooth so as to not damage the magnet.

    The other way is to just use another really strong magnet to pull the driver magnet upwards. Slap on the magnet and pull with your hands. Surprisingly works well.

    On the older units though the magnets are very very tight so I have to use the screwdriver method. The plastic enclosure for these things are polygonal rather than circular so they achieve more friction.

    If you're worried about puncturing the diaphragm in the process you can blow a short burst of air into the drivers first so that the diaphragm raises upwards. That way you have more space to wiggle around inside.
     
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  5. ext1

    ext1 MOT: JAR650

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    Latest updates. Finally finished some pairs... a huge thank you to those who waited! I'm very sorry to have kept you waiting.
    [​IMG]
    One of the pairs is not like the other.... that's the latest 580 work there, which is going on a loaner tour- coming soon to a loaner thread near you™

    I'm happy with how the 580 turned out - hopefully I can work on some vintage 600 and 650s I've been hoarding up over the past months in the same way.
     
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  6. Clemmaster

    Clemmaster Friend

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    Any update on the remaining pairs? :)
     
  7. ext1

    ext1 MOT: JAR650

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    Clem you’re on the next batch! I’m halfway done with it. Sorry for the wait! It’s the nature of doing everything alone, and also the manufacture process.

    I’m also figuring out an improvement to the design, like using metal threads for better clamp and damping and making the foam attachment piece snap-fit, so it might be possible to get those improvements in time.
     
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  8. Josh Schor

    Josh Schor Friend

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    hello,
    can I get my hd600 moded by you, are you still doing the mod?
    best,
    Josh
     
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  9. ext1

    ext1 MOT: JAR650

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    Replied to your PM! We should talk over there.
     
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  10. Azimuth

    Azimuth FKA rtaylor76, Friend

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    Some of these have holes as big as a silver dollar, some as big as a quarter. Can you explain why some are different?

    The only reason I ask is that the used JAR600 I have has full front foam.

    Thanks.
     
  11. ext1

    ext1 MOT: JAR650

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    You mean…the foam? I do cut the foam same size always, but they stretch when the earpad snaps on to the cups on either end. This is probably accounting for the differences you see.

    600 should have full front foam. It was decided the tuning is better that way.
     
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  12. Ksorota

    Ksorota Friend

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    I think the confusion is from the black screen 580. You can just make out the black foam at about the same diameter as the other two headphones...but its hard to see against the black screen.
     
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  13. ext1

    ext1 MOT: JAR650

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    Hey everyone!
    Now that I'm back home, I'm working on the cans again!
    There's a slight part upgrade that's happening, so that could delay things. I'm hoping it's worth it, though.
    https://drive.google.com/file/d/1S4Lld3XT15kEl9vrxo8oDpM0aqGFKyiE/view?usp=sharing
    Basically I'm thinking of making the part snap-fit, it's a theory but should be better in the long run over the current system.
    Slight changes to design too.
    I still have some parts work in progress so I don't think the majority of the pairs will be affected by the change!
     
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