Jupiter Audio Research HD650 Impressions/Measurements (Finalized Mod)

Discussion in 'Headphone Measurements' started by Hands, Oct 19, 2018.

  1. purr1n

    purr1n Finding his inner redneck

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    JAR600 vs JAR650
    upload_2019-10-4_21-38-47.png
     
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  2. fierce_freak

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    I have a jar 600 incoming, but I think I may have a jar 650 in my future based on fr on your graph (that bass extension!). Excited to get the jar 600, though.
     
  3. fierce_freak

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    Got the 600 today and gave it a listen for about 30 minutes. Wow, brilliant. The control over the drivers is really great, so clean and precise. I'm more impressed than I thought I would be (new toy and quick impressions caveat of course)
     
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  4. Pharmaboy

    Pharmaboy Friend

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    I never much liked the HD600 to begin with, so never pursued a JAR650 w/@ext1. Interesting to read these brief but positive comments about it...hope to read more impressions about your JAR600.

    I can tell you the JAR650 is also brilliant (IMHO)--building upon the pleasing basic voicing of the stock HD650, w/everything that's good getting even better.
     
    Last edited: Oct 5, 2019
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  5. ChaChaRealSmooth

    ChaChaRealSmooth SBAF Gearmaster

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    Thanks to @Hands, I got to try the latest iteration of the JAR HD650. TL;DR, my impressions roughly coincide with @Hands' opinion on them.

    To me, these sound like a HD650+. The sound tightens up a bit and it sounds more controlled. The most noticeable thing was the bass; these do go some way into fixing the looseness in the bass. This also affects the bass-to-mids transition; the headphone sounds more cohesive in this region to my ears. However, it's still a HD650, so they're not going to deliver phat planar bass or anything like that. Secondarily, the mids-to-treble is smoothed out a bit; anyone slightly bothered by a little heat in the lower treble of the stock HD650 may find these a bit smoother.

    I'm unsure whether these are more resolving than the HD650 stock, but the details are a bit more obvious with this headphone. The stopping behavior is where the JAR HD650 sounds more controlled, and possibly why it seems to sound a bit blacker in background, making the aforementioned details stand out a bit more.

    I should mention build quality; these do feel pretty solid. For those worried these might feel like a grade school project, they don't. Also, interestingly, I find myself turning the pot on the Starlett up with these; they don't seem to play as loudly as my ZMF stuff, or the stock HD650.

    Speaking of Starlett, amp synergies carry over from the stock one. I thoroughly enjoyed these out of both Euforia and Starlett.

    I like these, but it's important to bear in mind that these are still a HD650. Any complaints about the stock HD 650 is likely going to carry over to these.
     
    Last edited: Oct 13, 2019
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  6. Hands

    Hands Overzealous Auto Flusher - Measurbator

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    @ChaChaRealSmooth Final revision + that custom charcoal foam I used in the rear, yeah?
     
  7. ChaChaRealSmooth

    ChaChaRealSmooth SBAF Gearmaster

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    Yes to both. I haven't touched the earlier version yet.
     
  8. tommytakis

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    JAR650 Impressions:
    287348C7-D903-43D4-84E9-E41FA717DB6B.jpeg
    I was previously very impressed with the JAR600 so I had high hopes for JAR650. I’m happy to report that JAR650 exceeded my expectation and might slightly prefer it over the JAR600. Thank you @ext1 for making sure my JAR650 was sent before heading out to serve in the military. Hope the military life is treating you well and Best of luck to you Jupiter.

    Listening Chain: Pi2AES > Bifrost 2> SW51+ | Black Widow > JAR650 | JAR600 | Verum 1

    - Okay, so let’s start with the overall tonality...Surprise! It’s still a 650!!!! hahaha jokes aside, I see this as a good thing for fans of the 650 signature like myself. As @ChaChaRealSmooth has pointed out, it’s more like a 650+ with some tweaks to make it a more technically proficient (macro) and enjoyable headphone. When I first saw the pictures of JAR650, I was a bit worried that it would quickly lead to fatigue because of its substantially larger cut on the inside, compared to the coin mod on 650K. I found the JAR650 much smoother with zero fatigue.
    - the low end feels substantially tighter and more controlled and no longer has that “wooly” bass that the stock version is often criticized for. It’s still not a strong point for the 650, but feels less like a weakness. When comparing against Verum 1, I found the differences were not as bad as one would expect. I suspect that SW51+ is partly the reason for it as I felt that the bass on the BW made the bass too “bloomy” for my taste.
    -Ugh, yes... the sennheiser mids. It’s heavenly. It’s full bodied without being too forward and smooth like butter with no hint of roughness in vocals. This is the main reason why I prefer the JAR650 over the 600. The JAR600 sounds more lively at the cost of some roughness heard sometimes when I shuffle through various genre. I prefer the JAR600 on instrumental genre, but majority of my listening consist of vocal-oriented genre so the JAR650 naturally ends up getting more listening time on my head.
    - Treble feels slightly relaxed than the JAR600, but please don’t misinterpret this as being “dark,” because it’s not. I actually found that it pairs better with a more neutral sounding amp like the SW51+. Seriously excellent synergy. I’m curious to see what @Phantaminum ends up preferring (Elex vs. JAR650) with SW51+ because while I found the synergy to be great with the Elex as well, I felt that it was a bit tipped up in the air region and could only enjoy at lower volume.
    - macro and micro dynamics are both excellent. Just like JAR600, it really tightens and focuses the sound compared to the stock 650. The image is still 3 blobby, but it feels more controlled in the macro aspect. I felt that JAR650 easily surpasses the Verum 1 in this aspect. Maybe not a fair comparison since it’s mainly due to Dynamic vs. Planar.
    - it’s still highly resolving of low level detail and nuanced just like the 650.
    - clarity seems improved with blacker background. Instruments seemed better separated and less blended together compared to stock.

    Overall, I think JAR650 is an excellent product geared towards 650 fans like myself. It’s definitely a step up from the KISS mod (which I still appreciate) and I’m not sure what other mods we can do to improve from here. It won’t wow you with crazy 3D spherical rendering like the Verite, but it’s a mature headphone that you’ll always come back to. I still stand by what I said about the JAR600 as I can see people preferring one over the other. This will probably be my daily driver for the foreseeable future and thank you @ext1 and @Hands for all your hard work creating this beast!
     

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