atomicbob
Last Activity:
Dec 2, 2022 at 7:25 PM
Joined:
Sep 27, 2015
Messages:
2,313
Trophy Points:
113
Positive ratings received:
17,613
Neutral ratings received:
2
Negative ratings received:
10

Post Ratings

Received: Given:
Like 16,814 4,540
Dislike 6 0
Respectively Disagree 2 0
Miss Information 4 0
Epic 752 39
Agreed, ditto, +1 47 2
Gender:
Male
Location:
On planet
Occupation:
acoustic research scientist

Share This Page

atomicbob

dScope Yoda, Male, from On planet

Friend BWC MZR

PSA: Noise Nuke only works safely with DC output SMPS. Do NOT use with AC wall warts, of which most Schiit small products use. Damage risk. Dec 2, 2022 at 5:21 PM

atomicbob was last seen:
Dec 2, 2022 at 7:25 PM
    1. atomicbob
      atomicbob
      PSA: Noise Nuke only works safely with DC output SMPS. Do NOT use with AC wall warts, of which most Schiit small products use. Damage risk.
      1. Jinxy245, Philimon, zottel and 11 others like this.
      2. Justin S
        Justin S
        Thanks, @atomicbob . I am guilty of hooking one up to the Piety wallwart [facepalm]. How would I test the Noise Nuke to see if I damaged it?
        Dec 2, 2022 at 6:41 PM
      3. atomicbob
        atomicbob
        Dec 2, 2022 at 7:22 PM
      4. Justin S
        Justin S
        Dec 3, 2022 at 5:24 AM
    2. atomicbob
      atomicbob
      Drive-by-update: last 8 days have been complicated. Illness, weather events, major power outage. Power back for the moment but unstable.
      1. Jinxy245 likes this.
      2. View previous comments...
      3. atomicbob
        atomicbob
        At height of storm more than 90K total were without power.

        I have to repair some infrastructure damage that occurred. Also restoring a complex network that was partially scrammed due to one of many UPS losing a battery.
        Dec 1, 2022 at 7:27 PM
        Thad E Ginathom likes this.
      4. gixxerwimp
        gixxerwimp
        At least it was "just a storm" and not Iranian drones taking out your power ;)
        Hope the repairs go smoothly
        Dec 1, 2022 at 10:30 PM
        atomicbob and Thad E Ginathom like this.
      5. atomicbob
        atomicbob
        @gixxerwimp - for that I am most thankful. Repairs underway. Some are awaiting arrival of replace components. Measurements will resume after complete lab analyzer calibration checks.
        Dec 2, 2022 at 7:24 PM
        Thad E Ginathom likes this.
    3. atomicbob
      atomicbob
      Last week was filled with corporate and AES activities, presentations. One more presentation to make company worldwide next week.
      1. Jinxy245, Wilson, CEE TEE and 8 others like this.
      2. Thad E Ginathom
        Thad E Ginathom
        The retirement thing was an exaggeration?
        Nov 20, 2022
        RestoredSparda likes this.
      3. atomicbob
        atomicbob
        @Thad E Ginathom Semi retirement, no direct project assignments. But presentations on audio / acoustics / psycho-acoustics to the engineering staff worldwide, on demand, which has become pretty much weekly. Latest is the stubborn consistency of physics involved with audio Crest Factors.
        Nov 20, 2022
    4. ecline56
      ecline56
      Hello Sir,

      You seem to be the technical expert on SBAF. I wanted to ask if you know whether the Modi multibit dac has any appreciable DC offset. I would like to jump the input caps on my Whammy.
      1. Cspirou likes this.
      2. Lyander
        Lyander
        Hi, this is a publicly-visible profile post. You may wish to redact any sensitive information, e.g. your name. And yep the layout of things makes it easy to do this by accident it seems.
        Nov 19, 2022
      3. atomicbob
        atomicbob
        @ecline56
        My specific Modi MB with v2 firmware has the following DC offset measured at a specific point in time:

        L ch: +416 uV
        R ch: -2.00 mV

        Different times the values may vary by several hundred uV.
        Other units may vary from these values measured.
        Nov 20, 2022
    5. atomicbob
      atomicbob
      Owned HE-500 for 10 yrs. Have listened to them more in the last two weeks than previous 10 yrs. Taboo mk4 and Forza Audio cables.
      1. Azimuth, Jinxy245, Vtory and 9 others like this.
      2. View previous comments...
      3. RestoredSparda
        RestoredSparda
        Still regret selling mine. Purchased them when they first came out. Loved them. Think I used them with the Hifiman EF5 Amp. God that amp was warmpoo. Lol
        Nov 7, 2022
        atomicbob likes this.
      4. atomicbob
        atomicbob
        Forza Audio fixed the issue I had with the HE-500 stock cable which was too stiff creating considerable neck loading. Taboo mk4 provided the synergy that made these cans come alive for me.
        Nov 7, 2022
        RestoredSparda likes this.
      5. Azimuth
        Azimuth
        They are only best with the Yerg pads to tame that 8k peak and bring in some lows.
        Nov 9, 2022
    6. atomicbob
      atomicbob
      Depending on your viewpoint I've either been blessed, cursed or corrupted by SBAF with ultra distracting sound quality systems.
      1. yotacowboy
        yotacowboy
        We're all Blursupted by SBAF.
        Nov 1, 2022
      2. ChaChaRealSmooth
        ChaChaRealSmooth
        Cursed most definitely. I also wish that I legitimately could not tell the difference between gear. Would mean I get ultimate satisfaction from utter shit and I'd save tons of money
        Nov 1, 2022
      3. Cryptowolf
        Cryptowolf
        I am all of those things and much happier and wiser for it.
        Nov 2, 2022
    7. atomicbob
      atomicbob
      when reading my latest post about APx555 vs ARTA + MOTU use the following translation key:
      1. Cryptowolf likes this.
      2. atomicbob
        atomicbob
        substitute "obsess" with "give a shit"
        Oct 17, 2022
      3. Qildail
        Qildail
        I can see where the decoding key might be needed. It’s a delicate nuance of meaning for sure…
        Oct 18, 2022
        atomicbob likes this.
    8. atomicbob
      atomicbob
      Last day of vacation. Going to uncork some good reds and watch old BW movies.
      1. gixxerwimp
        gixxerwimp
        I thought you'd retired...
        Oct 23, 2022
        atomicbob likes this.
      2. atomicbob
        atomicbob
        @gixxerwimp - semi-retired. Still put in 20 ~ 30 hours / week for corporate mentoring and doing research.
        Oct 24, 2022
    9. atomicbob
      atomicbob
      Taboo mkiv must have been tuned for The Who, especially Tommy. Amazing Journey is just that, with HD800S and Holo Spring2 KTE.
    10. atomicbob
      atomicbob
      Vaccination time ... human pin cushion. I think I've been vaccinated against everything known.
      1. Cryptowolf, zottel, Jinxy245 and 5 others like this.
      2. View previous comments...
      3. atomicbob
        atomicbob
        Well, one data point, I haven't had even so much as a common cold since 2019. Yet I have been exposed to plenty of ill people due to my paths of exposure involving medical device research, etc.
        Oct 8, 2022
        Cryptowolf likes this.
      4. Thad E Ginathom
        Thad E Ginathom
        The first thing to distrust in life is anonymous "studies!"

        Do I trust the covid vaccine. I had three and... covid. I'll admit to seeing the expectations continuously downgraded. But I'll probably get more when they come along.
        Oct 8, 2022
        Cryptowolf and atomicbob like this.
      5. Thad E Ginathom
        Thad E Ginathom
        I got covid as a 70th birthday present. I'm a little bit old.

        It wasn't nice, but it wasn't /too/ horrible. Who knows? without the vaccines I may have been gasping my last breath into a ventilator.

        I don't know. There isn't a control me living an identical life except for distilled-water-only vaccines!
        Oct 8, 2022
        Cryptowolf and atomicbob like this.
    11. atomicbob
      atomicbob
      If you were looking for the Piety 32R Lo gain pdf report, I forgot to attach it last night. The post has been updated to include the report.
      1. View previous comments...
      2. Qildail
        Qildail
        I am simply amazed by the breadth of all these measurements. I don't understand a lot of it (still; trying to learn), but I can recognize concerted hours of effort when I see it. We are spoiled by the richness of your work.
        Oct 4, 2022
        atomicbob, Cryptowolf, zottel and 2 others like this.
      3. Vtory
        Vtory
        Thanks that's exactly what I was looking for. I was about to ask if it was not updated by tomorrow.
        Oct 4, 2022
        atomicbob likes this.
      4. atomicbob
        atomicbob
        @Qildail : thank-you. It takes many many hours to make the measurements, vet the data, prepare pre-post data organization and writeup and then execute the posts.
        Oct 5, 2022
        Qildail and CEE TEE like this.
    12. atomicbob
      1. MLegend
        MLegend
        Is the link blocked for anyone else? When I click on the link it opens a blank page with "about:blank#blocked" in the search bar.
        Oct 1, 2022
      2. atomicbob
    13. atomicbob
      atomicbob
      Have been lying low lately. Outpatient procedure last week. Good news is no cancer. Bad news is dermatologist didn't use local anesthesia.
      1. View previous comments...
      2. Wilson
        Wilson
        Cancer is a demon...
        Sep 20, 2022
        Cryptowolf, Jinxy245 and atomicbob like this.
      3. atomicbob
        atomicbob
        @Jinxy245 & @Wilson : agreed. Cancer is very bad news. My wife (& best friend) is a 20+ year survivor. Chemo & radiation back then were brutal. So in comparison I'm kind of whining.
        Sep 20, 2022
      4. Cryptowolf
        Cryptowolf
        Fuck cancer. I've lost too many loved ones, including dogs, to this scurge.
        Sep 20, 2022
        atomicbob and Jinxy245 like this.
    14. atomicbob
      atomicbob
      So many measurements, so little time. Windows 10 USB audio has many paths to diminished performance.
      1. zottel, Azimuth, MLegend and 4 others like this.
      2. View previous comments...
      3. Riotvan
        Riotvan
        @Azimuth hmm can't say i've really noticed that problem, maybe because most of my files are 16bit 44.1kzh? For other stuff like youtube etc i just use pipewire or pulse.
        Sep 13, 2022
        Azimuth likes this.
      4. Azimuth
        Azimuth
        I could not get any Linux distro to output high-res no matter what my settings were. Even even over USB - it would just down convert everything. And I changed a bunch of settings and lines in the code files of Pulse and Alsamixer...could never get it to work.
        Sep 13, 2022
        Riotvan likes this.
      5. Riotvan
        Riotvan
        Did you play with the hw:0,0 stuff? That should be bit-perfect. Even so there are disable resample setting for for asound.conf and if you keep the alsamixer at unity gain it should not touch anything.
        Sep 13, 2022
        zottel likes this.
    15. atomicbob
      atomicbob
      Diverging from the current communication trend, 110 / 175 measurement operations completed for yggdrasil LIM. Some take hours, others mins.
      1. jexby
        jexby
        someone somewhere should be paying you for this…..
        Aug 26, 2022
        gixxerwimp, Jinxy245, obsiCO and 6 others like this.
      2. atomicbob
        atomicbob
        @jexby Thank-you for the sentiment. To provide perspective, corporate typically pays me 3K to 4K for similar amounts of work.

        Awhile back @GoodEnoughGear sent a sampling of wonderful wines, many produced in his neighborhood in South Africa as a really nice perk.
        Aug 28, 2022
        GoodEnoughGear likes this.
    16. atomicbob
      atomicbob
      A most non-sequitur trilogy: Thick as a Brick, I Think We are All Bozos on this Bus, Dark side of the Moon. In that order. Explains a lot.
      1. Qildail, Jinxy245, Gazny and 3 others like this.
    17. atomicbob
      atomicbob
      I have many megabuck DACs, Amps, headphones in my lab, yet the Modi 3E, Vali 2+, ETA Mini Closed / HD800S are rocking my ears lately.
      1. zottel, sheldaze, Soups and 15 others like this.
      2. View previous comments...
      3. atomicbob
        atomicbob
        I still need an amp that can heat the lab, provide great visuals with those Linlai tubes and sound great too.
        Jul 27, 2022
        rhythmdevils likes this.
      4. rhythmdevils
        rhythmdevils
        I’ll trade you a really nice lava lamp. Last offer.
        Jul 27, 2022
        Boops likes this.
      5. Elnrik
        Elnrik
        I bid two lava lamps, a falafel, and a slightly used Dixie cup
        Jul 27, 2022
        rhythmdevils likes this.
    18. atomicbob
      atomicbob
      Interesting details from AES meeting on Woodstock 1969 sound system from Bill Hanley, Chris Langhart, John Chester and others ...
      1. gixxerwimp, Josh83, DigMe and 5 others like this.
      2. View previous comments...
      3. atomicbob
        atomicbob
        Amps used were McIntosh & Crown
        MC3500 - 16
        MC2105 - 3
        MC275 - 2
        DC300 - 2
        Over 12.7KW of amp power

        Speakers were conservatively rated at 10 KW actual continuous usage.
        Jun 23, 2022
        Cryptowolf, dubharmonic and Cspirou like this.
      4. atomicbob
        atomicbob
        Festival power:
        1200 amps per phase, 3 phase power for a total of 3600 A
        and 346 KVA total.
        Jun 23, 2022
        Cryptowolf, dubharmonic and M3NTAL like this.
      5. CEE TEE
        CEE TEE
        Oh, my friend has a 2105 and the HD600 have big bass and sound great out of it...
        Jun 25, 2022
        atomicbob likes this.
    19. atomicbob
      atomicbob
      Attending an AES meeting on Woodstock 1969 sound system details with Bill Hanley & Chris Langhart presenting.
      1. crenca
        crenca
        Was there anything special or is it mostly of historical interest?
        Jun 23, 2022
        Cryptowolf likes this.
      2. atomicbob
        atomicbob
        @crenca - see latest status update
        It was a detailed technical review of the festival sound and power and how it guided development for generations of sound reinforcement rigs.
        Jun 23, 2022
    20. atomicbob
      atomicbob
      Spending time listening to unmodified original HD800, HD8xx and HD800-Jmod, not to be confused with JAR800 which I haven't heard.
      1. View previous comments...
      2. atomicbob
        atomicbob
        HD8xx has a better low frequency leading edge impact for sounds such as kick and upright bass, which I enjoy. But it sounds a bit recessed above 3000 Hz leaving me feeling as if a treble tone control was turned down 3dB.
        Jun 14, 2022
        gixxerwimp likes this.
      3. gixxerwimp
        gixxerwimp
        My HD800 J-mod variant hasn't been getting a lot of love since Voldemort and then BP800 arrived, but it's still a great sounding headphone.
        Jun 15, 2022
      4. atomicbob
        atomicbob
        @gixxerwimp Still enjoy my HD800-Jmod immensely but need to have a backup plan if or when they deteriorate for any reason.
        Jun 15, 2022
        gixxerwimp likes this.
  • Loading...
  • Loading...
  • About

    Gender:
    Male
    Location:
    On planet
    Occupation:
    acoustic research scientist
    Gear List:
    See information section for my opinions
    My enjoyment of particular recreational music systems is inextricably intertwined with my personal preferences. The following lists are representations of my tastes in music, components and listening levels. The section on music is only a sample of my library but should provide sufficient insight into my musical preferences. I am rigorous and exacting with component measurements. That doesn’t automatically make my opinions worth anything without context. Use the following information to decide how well your own preferences converge or diverge with mine when I make comments about equipment in the forum. DO NOT blindly assume a positive comment from me about some component or headphone will automatically translate to auditory happiness on your part. Likewise you may find yourself enjoying something that I don’t. Consider (learning) your own personal preference.

    Music
    50s, 60s & 70s jazz
    Louis Armstrong, Charles Mingus, Thelonious Monk, Sonny Rollins, Miles Davis, Duke Ellington, Cannonball Adderly, Les McCann & Eddie Harris
    Recorded by Columbia (Frank Laico, Fred Plaut), Bluenote (Rudy Van Gelder), Contemporary Records (Roy DuNann)

    More recent jazz artists
    Wynton Marsalis
    Dave Grusin
    Dave Brubeck
    Bela Fleck
    Chick Corea
    Christian McBride
    Wycliffe Gordon
    Ingrid Jensen
    Steve Treseler
    Terell Stafford
    Ronnie Earl
    Steve Gadd Band
    Charlie Haden
    Brad Mehldau

    Medeski, Martin & Wood
    Medeski, Scofield, Martin & Wood
    Ill Considered
    Snarky Puppy
    Pat Metheny

    Artfully deviant
    Steve’n’Seagulls - Thunderstruck
    Two Cellos - Thunderstruck

    A class by himself
    Santana

    60s & 70s rock
    Emerson Lake & Palmer
    Blood Sweat & Tears
    Pink Floyd
    Jethro Tull
    JJ Cale
    Little Feat
    Dave Matthews Band
    Chicago
    Queen
    Cat Steven – Tea for the Tillerman
    Grateful Dead
    Lead Zeppelin

    Tangerine Dream
    Bruce Becvar
    Gary Stroutsos

    Classical composers
    Mozart
    Bach
    Beethoven
    Respighi
    Vivaldi

    Special
    Canadian Brass

    Listening Levels dBSPL
    60~70 quiet, background listening
    70~80 recreational and critical listening
    80~90 rocking out, often with libations at hand
    90~100 Santana Black Magic Woman / Gypsy Queen, ELP Tank - drum solo

    I tend to listen at quieter levels where electroacoustic transducers exhibit greater linearity. Higher levels are more likely to have greater distortion and require higher power amplification. The result is substantial deviation in opinions by listeners attempting to compare headphones when they are listening at different levels.

    DACs
    Treasured
    Holo Audio KTE Spring2
    Schiit Bifrost2
    Matrix Audio X-Sabre Pro
    Lavry DA11

    Enjoy
    Schiit Yggdrasil A2
    Schiit Gungnir MB A2
    Soekris 1421

    Work (recording, editing, acoustic measurements)
    Lavry DA11, AD11
    RME ADI-2 Pro

    Rather not listen
    Auralec Vega
    Resonessence Labs Concero
    Topping D30
    Objective DAC

    Universal Turd
    Audio-gd S19

    Amps
    Treasured
    Eddie Current Studio B
    Eddie Current Zana Deux SE
    ECP Audio DSHA-3F
    ECP Audio T4
    Shortest Way 51+
    Cavalli Liquid Crimson

    Enjoy
    Cavalli Liquid Platinum
    Schiit Lyr3 with PSVane 6SN7
    EC ZDT Jr after hum reduction modifications
    BottleHead Crack (PS modified, no speedball, e80cc driver)
    Cavalli MCTH
    Schiit Magni3+
    Schiit Vali2 with 6CG7
    Project Sunrise with 12BH7 and Linear Power Supply

    Rather not listen
    Objective 2
    Topping anything

    Headphones

    Treasured
    Sennheiser HD800-Jmod
    Focal Stellia
    Sennheiser HD600

    Enjoy
    Sennheiser HD650
    Focal Clear
    HiFiMan HE-500

    Rather not listen
    Most anything planar except for the HE-500

    System
    I developed a VST chain dubbed Immersion Virtualization System which I employ for my recreational listening. This has a substantial influence on my perception of component performance. See the IVS descriptions in the following links:

    https://www.superbestaudiofriends.o...-synergy-special-sound.54/page-14#post-129407

    https://www.superbestaudiofriends.o...-synergy-special-sound.54/page-29#post-221217

    Signature

    Organizing chaos for seven decades.