skem
Last Activity:
Jan 23, 2019 at 7:57 AM
Joined:
Nov 1, 2017
Messages:
187
Likes Received:
547
Dislikes Received:
2
Trophy Points:
93
Gender:
Male
Location:
Cambridge, MA
Occupation:
Experimental Physicist

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skem

Friend, Male, from Cambridge, MA

Friend

It’s 8*F here, but casually watched the lunar eclipse go into totality from the hot tub. Jan 20, 2019 at 9:09 PM

skem was last seen:
Jan 23, 2019 at 7:57 AM
    1. skem
      skem
      It’s 8*F here, but casually watched the lunar eclipse go into totality from the hot tub.
      1. Syzygy, brencho and Jinxy245 like this.
      2. spwath
        spwath
        I just see clouds and snow falling unfortunately.
        Jan 20, 2019 at 9:15 PM
        DigMe likes this.
    2. skem
      skem
      I’m so curious why the cold Gungnir Multibit sounds bad. I somehow doubt it’s the resistors. Makes no physical sense.
      1. View previous comments...
      2. famish99
        famish99
        Most likely the clocks since it's not oven controlled. Resistors do change with temperature but they probably heat up quickly enough.
        Jan 20, 2019 at 7:07 AM
      3. skem
        skem
        More thinking: if all the resistors in the R:2R have the same temp coefficient, nothing should change. If the rungs and the rails have different temp coefficients, then we would get harmonic distortion.

        As long as one clock is MCLK, shouldn’t the sound be slight out of tune but otherwise distortion free?
        Jan 20, 2019 at 7:56 AM
      4. famish99
        famish99
        Average clock frequency isn't the problem as much as the jitter. I would say that within the chip the resistors can heat up unevenly. Tbh I'm pulling at straws myself, but the end result is hard to deny.
        Jan 20, 2019 at 8:13 AM
        skem likes this.
    3. skem
      skem
      1. FallingObjects and Deep Funk like this.
      2. Deep Funk
        Deep Funk
        Their software is acting strange. Even when playing album cued tracks shuffle kicks in. I might only keep it for new album releases and then go back to making my own play lists like the old days.
        Jan 15, 2019
      3. Azimuth
        Azimuth
        In talking to non-Audio friends work, I was surprised how many were unfamiliar with Tidal.
        Jan 15, 2019
    4. skem
      skem
      In SoCal to escape the miserable northeast winter—but no system with me. Is the better weather really worth the lack of music?
      1. Jinxy245, brencho and dubharmonic like this.
      2. View previous comments...
      3. bixby
        bixby
        @Uri Cohen - I guess Birth Control not needed for those 9 months, and do they reattach when winter comes :)
        Jan 11, 2019
      4. Uri Cohen
        Uri Cohen
        LOL. After living in the sweatbox for nine months of the year for almost 20 years, I need a break.
        Jan 11, 2019
      5. Merrick
        Merrick
        You’re in SoCal, screw the system. Spend every night seeing an amazing live show.
        Jan 12, 2019
    5. skem
      skem
      May the New Year bring you music, joy, and perfect gear.
      1. Jerry, BillOhio, dubharmonic and 11 others like this.
    6. skem
      skem
      And now....not Christmas.
      1. Wilson and BillOhio like this.
    7. skem
      skem
      A sunny Xmas day with Vince Guaraldi on the HiFi, a box of truffles, and a coffee. Peace to all.
      1. Cryptowolf, Jinxy245, pavi and 7 others like this.
      2. Kunlun
        Kunlun
        Whoops, did the accidental-fat-thumb-dislike/undislike/like. Peace!
        Dec 25, 2018
        skem likes this.
    8. skem
      skem
      Gumb-y autocorrects to Gungnir Multibit! Fancy that.
      1. OldDude04 and Jinxy245 like this.
      2. View previous comments...
      3. skem
        skem
        It’s a good thing. I’d write out the Schiit names if I didn’t have to lookup the spelling each time. :-/
        Dec 24, 2018
      4. rtaylor76
        rtaylor76
        SEO is for realz.
        Dec 24, 2018
      5. Lyer25
        Lyer25
        Just when I was getting used to the shortform after forcing myself to adopt it, haha. But yeah, this definitely helps when looking stuff up, so while I can see how it'd suck for some SEO wins out
        Dec 24, 2018
    9. skem
      skem
      Pass B1 pre-amp gets finished today. Includes a faceplate cut on the world’s most precise water jet cutter
      1. brencho, Soups, dubharmonic and 6 others like this.
      2. Cspirou
        Cspirou
        Nice! Where is the water jet? Through work?
        Dec 22, 2018
      3. skem
        skem
        Yes, at my work. I also made a walnut enclosure there. I’ll post pics soon.
        Dec 22, 2018
        philipmorgan and dubharmonic like this.
      4. skem
    10. skem
      skem
      I have to say BWC, MZR really feels like a high-school clique. “Friend” not feeling exclusive enough? Need to be cooler, like PJ and Squi?
      1. rtaylor76 likes this.
      2. View previous comments...
      3. Lyer25
        Lyer25
        Also, disagreeing with others is encouraged, so long as it's done nicely and can generate good discussion. Some people can be assholes and not receive sanctions, but eh, that's just nepotism— nothing anyone living in a democratic country wouldn't be familiar with.
        Dec 20, 2018
        OldDude04 likes this.
      4. OldDude04
        OldDude04
        @Lyer25 "nothing anyone living in a democratic country wouldn't be familiar with."

        That gave me a good chuckle, the funniest stuff is always rooted in truth.
        Dec 20, 2018
        Lyer25 likes this.
      5. Lyer25
        Lyer25
        It makes sense, considering how people use humour to sublimate negative emotions and stuff :P

        No but really we basically have fiefdoms in some cities here. Blergh.

        Going back on-topic, I'm still okay with the tags, helps keep in mind people I can bug for info :))
        Dec 20, 2018
    11. skem
      skem
      Bought myself a guitar. 40th birthday on the horizon. Let the mid-life “crisis” begin!
      1. DigMe
        DigMe
        What'd you get?
        Dec 4, 2018
      2. Soups
        Soups
        Man, I'm nearing that age as well, and about to sell most of my guitars. To afford some decent speakers. Crisis indeed.
        Dec 4, 2018
        westermac and DigMe like this.
      3. ButtUglyJeff
        ButtUglyJeff
        I got myself a new bass when I turned 40, b-day gift to self. My wife named it "midlife crisis"...
        Dec 5, 2018
        DigMe and Jinxy245 like this.
    12. skem
      skem
      Well, today is my 1-year SBAF birthday... but sadly I have been too busy to play with audio stuff for a month now. And I have a cold.
      1. brencho, Wilson and Thad E Ginathom like this.
      2. View previous comments...
      3. Kunlun
        Kunlun
        That bird was banned from here a long time ago.
        Oct 1, 2018
        obsiCO, Jinxy245, JK47 and 3 others like this.
      4. Lyer25
        Lyer25
        ^That joke only works because you were the one who made it :))

        @skem Hope you get well soon!
        Oct 1, 2018
      5. bengo
        bengo
        @skem You were just in the wrong place at the wrong time. My wife got shat on twice by the same pigeon twice in the space of 5 mins (with a change of clothes in-between). Second time she realized she was standing right under its branch.
        Oct 1, 2018
        Thad E Ginathom likes this.
    13. skem
      skem
      Damn-it! Broke a famously irreplaceable STV-4H varistor.
    14. skem
      skem
      Just finished restoring an old Onkyo A7 for shits’n’giggles. Not bad, actually.
    15. skem
      skem
      All harmonics on Pioneer M22 were below the dynamic range of my HP analyzer. Just bought QA401 to go fishing with more bit depth
      1. ultrabike likes this.
      2. Priidik
        Priidik
        Hardly surprising. Which HP ?
        Aug 27, 2018
        ultrabike likes this.
      3. ultrabike
        ultrabike
        Second that one. Which HP?
        Aug 27, 2018
      4. skem
        skem
        HP3561A. It has a nice noise floor several dB below its -120dBV (1uV) spec, floating ground, and is capable of handling full power amp output up to 22V RMS without extra attenuators, but it’s buit on a 13-bit DAC, so the dynamic range is limited to 80dB. Porn here: https://accusrc.com/uploads/datasheets/5350_3561a.pdf
        Aug 27, 2018
    16. skem
    17. skem
    18. skem
      skem
      After 3 months of detailed rebuilding, careful component matching, and design edits, my Pioneer M22 is singing beautifully.
      1. rlow, Lyer25, A1Gear and 9 others like this.
      2. PTS
        PTS
        Can you detail this in a forum post, or link to where you have? I'm interested to read.
        Jul 14, 2018
      3. skem
        skem
        Will do. I have lots of notes but first testing to see how good it is.
        Jul 14, 2018
        PTS likes this.
      4. skem
        skem
        So I have determined m22 is still not ready for prime time. It’s good, but my pass labs is cleaner so I’m going to do more work on the m22. Stay tuned.
        Jul 15, 2018
    19. skem
      skem
      JVC FD-01 arrived today.
      1. mphuongz, james444 and Lyer25 like this.
      2. View previous comments...
      3. Mimouille
        Mimouille
        Did I describe them :D
        Jul 10, 2018
      4. skem
        skem
        Jul 10, 2018
      5. skem
        skem
        The JVC FD-01 is for sale. Not gym-friendly enough for me to keep (gym is my only IEM need)
        Jul 14, 2018
    20. skem
      skem
      I am the walrus.
      1. View previous comments...
      2. rtaylor76
        rtaylor76
        ^Don't confuse me with Howard Stern. He's kind of like you...a joke.
        Jun 28, 2018
      3. JK47
        JK47
        If so, the jokes on you
        Jun 28, 2018
      4. rtaylor76
        rtaylor76
        Har
        Jun 28, 2018
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  • About

    Gender:
    Male
    Location:
    Cambridge, MA
    Occupation:
    Experimental Physicist
    Gear List:
    System 1
    PS Audio DirectStream -> Pass Labs XA30.8 -> B&W 801 Series III

    System 2
    Gungnir Multibit Gen5 -> Pass B1 -> Ayre MX-R -> HHR Exotics TLS-1 Walsh F remake

    Headphone rig
    Gungnir Multibit Gen5 -> Pass B1 -> Pioneer M-22 -> HiFi Man HE1000 version 1

    Have also had (owned or long-term demo)
    ================================
    NAD M51 DAC
    Soekris1541 - power supply sucked too hard.
    PS Audio PerfectWave DAC
    PS Audio DirectStream Jr. - this thing has the worst noise floor!
    Benchmark DAC3 HGC — low noise, poor timbre, no stage.
    Schiit Yggdrasil A1 DAC early - lifeless IMO, but will have to hear again
    Schitt Modi Multibit DAC
    NAD D1050 DAC/Amp
    Theta DS Pro Gen V R2R DAC
    Mytek DAC (the first DAC I truly hated)
    Mark Levinson Model 39 DAC

    Schiit Asgard2 Amp
    Dragon Inspire IHA-1 (loaner)
    AURALiC Taurus MkII Amp
    Woo WA3 Amp - detail destroying.
    Benchmark AHB2 Amp - too harsh, unforgiving.
    NAD - M22 Class D
    B&O ICEpower 125ASX2 Class D

    Focal Elear
    Hifiman HE-560
    HD660s
    HD650
    LCD2C
    Sundara
    HD800sdr
    I like a detailed/textured sound that is not fatiguing and has good imaging. I listen primarily to older jazz, piano trio, bebop, and classical. Sucker for a bit of warm tonality provided it doesn’t screw up timbre and imgaging too much.