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: Upscale Audio; recovering HFM addict

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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 it's not drinking alone if you're on Zoom

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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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