atomicbob
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Gender:
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Location:
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Occupation:
acoustic research scientist

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atomicbob

dScope Yoda, Male, from On planet

Pyrate BWC MZR

Schiit Valhalla 3 passes the DSOTM test. Very well done Jason! Jun 26, 2025 at 10:34 PM

atomicbob was last seen:
Jul 2, 2025 at 7:41 PM
    1. atomicbob
      atomicbob
      Schiit Valhalla 3 passes the DSOTM test. Very well done Jason!
      1. zottel, Case, schiit and 9 others like this.
      2. View previous comments...
      3. HotRatSalad
        HotRatSalad
        Us and them falls apart real easy. Easily the worse sounding track on the album. I also love that drawn out "synth" or "moog" note that drops on certain verses of "time" as well.
        Jun 27, 2025 at 12:00 PM
        SofaSamuraiX and atomicbob like this.
      4. joch
        joch
        Jun 27, 2025 at 6:59 PM
        atomicbob likes this.
      5. atomicbob
        atomicbob
        HD800S. I am spending time with components readily available today. HD800 with mods I prefer the TA-66 with CSF-Thomson 6080W, but I could live with either.
        Jun 29, 2025 at 1:21 PM
        joch likes this.
    2. atomicbob
      atomicbob
      Everyone should have a belief system. Me, I believe I will have another glass of wine.
      1. Deep Funk, zottel, Qildail and 14 others like this.
      2. View previous comments...
      3. GoodEnoughGear
        GoodEnoughGear
        Any South African bottles left?
        Jun 14, 2025
        atomicbob likes this.
      4. atomicbob
        atomicbob
        @GoodEnoughGear Kanonkop Pinotage was the last one consumed just a few weeks back, thank-you! Had it with a grilled fillet mignon. Very delightful.
        Jun 14, 2025
        GoodEnoughGear and Jinxy245 like this.
      5. Riotvan
        Riotvan
        Settle down Gastronomicbob! ;)
        Jun 14, 2025
        atomicbob and joch like this.
    3. atomicbob
      atomicbob
      Pulmonary Function Test today indicates fibrosis is static, not progressing. Celebrating by spending more time with family (Thomas too.)
      1. wkw, Case, Josh83 and 30 others like this.
      2. SofaSamuraiX
        SofaSamuraiX
        Awesome! Life is good!!
        Jun 5, 2025
        atomicbob and ilikebananafudge_ like this.
      3. MisterRogers
        MisterRogers
        Happy to hear Bob!
        Jun 6, 2025
        SofaSamuraiX and atomicbob like this.
      4. atomicbob
        atomicbob
        Time you share is a gift which you may bestow upon your cherished companions and family. Don't let the pettiness of the world rob you of those special moments.
        Jun 6, 2025
        Case, Grattle and SofaSamuraiX like this.
    4. atomicbob
      atomicbob
      There is nothing quite like having a cat crawl in your lap, begin purring and then fall fast asleep snoring. Another of life's pleasures.
      1. Ash1412, zottel, Qildail and 17 others like this.
      2. View previous comments...
      3. yotacowboy
        yotacowboy
        On the other hand, I still quite enjoy when my 2 year old, going on 2 months old, Johnny hound doggo jumps from the top of the couch onto my laptop and bites me in the face. He's still figuring things out. "PLAY WITH ME" is still the most accessible phrase in his vocabulary.
        Jun 5, 2025
        atomicbob likes this.
      4. atomicbob
        atomicbob
        @Priidik you are blessed with some great furry companions.
        @yotacowboy when requested, remember to play with your pup. Their time in our lives is all too fleeting.
        Jun 5, 2025
        Priidik likes this.
      5. Priidik
        Priidik
        We have two story house - the upstairs is cat domain, of course.
        There is a choice - go nap in upstairs, 100% chance one or both cats will be residing on me, one most likely on my face, the other one on my tummy.
        Downstairs big sofa is where the dogs are fused with it most of the time.
        Jun 5, 2025
        atomicbob likes this.
    5. atomicbob
      atomicbob
      I have been offline since May 7 dealing with a dental odyssey. What started out as a simple crown replacement swelled into oral surgery ...
      1. Steakface, bixby, yotacowboy and 4 others like this.
      2. View previous comments...
      3. roshambo123
        roshambo123
        Having a good dentist is critical. A close relative had a bad one who cut corners by pretending temp fillings were permanent. They spent decades digging out from under that.
        May 26, 2025
        atomicbob and SofaSamuraiX like this.
      4. Steakface
        Steakface
        Sorry to see you're going through that. Hope you recover quickly and come back stronger.
        May 27, 2025
        atomicbob likes this.
      5. yotacowboy
        yotacowboy
        Sorry to hear, Bob!! GF has been dealing with similar dental scope creep. I fear some of it is a money grab by the dentist… “while we’re in there…”
        May 27, 2025
        atomicbob likes this.
    6. atomicbob
      atomicbob
      The neighbor walker I mentioned having a cardiac arrest is a survivor and will be out of the hospital soon. Hopefully walking again soon.
      1. zottel, yotacowboy, Jinxy245 and 11 others like this.
      2. Case
        Case
        Happy to read this!
        Mar 27, 2025
        atomicbob likes this.
      3. atomicbob
        atomicbob
        The neighbor has been out walking again. Had multiple stents. He is almost back to his fast walking pace again.
        May 27, 2025
    7. atomicbob
      atomicbob
      Latest pneumonia vaccine kicked both my wife and my butts! She had 103 °F fever and other flu like symptoms. I was out walking ...
      1. Thad E Ginathom and joch like this.
      2. View previous comments...
      3. joch
        joch
        Glad you’re getting your shots and minimizing your risks. Rest well.
        Mar 26, 2025
        atomicbob likes this.
      4. Thad E Ginathom
        Thad E Ginathom
        I *never* had a reaction to a vaccine, so I was always gung-ho about them and totally unprepared for what happened with my second covid shot. It only lasted 12-18 hours but it was *awful*

        Be well, Bob, and may your flu vaccine work well.
        Mar 26, 2025
        atomicbob likes this.
      5. MLegend
        MLegend
        I hope you and your wife have a quick and smooth recovery.
        Mar 26, 2025
        atomicbob likes this.
    8. atomicbob
      atomicbob
      1. Grattle, Qildail, Ti_Leo and 13 others like this.
      2. View previous comments...
      3. atomicbob
        atomicbob
        Live the volumes were fine. The ‘AI’ generated list of songs played is a different story.
        Mar 4, 2025
      4. Case
        Case
        Fiona, Marianne, Sinead,..outstanding
        Mar 5, 2025
        atomicbob likes this.
      5. CEE TEE
        CEE TEE
        Oh, it runs in the family!!
        Mar 5, 2025
        atomicbob and Case like this.
    9. atomicbob
      atomicbob
      Spent the day measuring Thomson-CSF 6080WA in TA-66. Started listening to I Robot. Fully sucked in. Posts will wait until tomorrow.
      1. Grattle, Justin S, Slade01 and 9 others like this.
    10. atomicbob
      atomicbob
      We have an evening custom of sitting in front of a fire with cat in lap and good red at the elbow. Our cat will herd me if I am not prompt.
      1. CEE TEE, zottel, Biodegraded and 12 others like this.
      2. joch
        joch
        That's the most awesome thing I've read today.
        Feb 13, 2025
        atomicbob, Thad E Ginathom and Case like this.
      3. Case
        Case
        Well deserved, Bob, well deserved. Cheers
        Feb 14, 2025
        atomicbob and Thad E Ginathom like this.
      4. atomicbob
        atomicbob
        The Lab Cat (Thomas) is very spoiled these days. He also has considerable lap time with the spare human (my wife.)
        Feb 14, 2025
        joch likes this.
    11. atomicbob
      atomicbob
      Distortion surfaces for 5 6AS7g measure differently and may be consistent with why they sound different. Graphs to be posted in a few days.
      1. atomicbob
        atomicbob
        630+ graphs and a few recordings which I am vetting and consolidating for an output of less than 70 for posting. Writeup nearly finished. Need to go enjoy cat on lap in front of a fire with a glass (or two) of good red.
        Feb 11, 2025
    12. atomicbob
      atomicbob
      Nothing gets adrenaline flowing like the distinctive sound a cat makes just before regurgitating, especially when on carpet.
      1. View previous comments...
      2. YMO
        YMO
        You and me both. This is why I sometimes want to cook my cat.
        Feb 9, 2025
      3. SofaSamuraiX
        SofaSamuraiX
        Plus they make the best sweet and sour chicken.
        Feb 9, 2025
      4. Thad E Ginathom
        Thad E Ginathom
        And why oh why, when we put a newspaper in front of them, do they refuse it and vomit on the mat anyway!
        Feb 9, 2025
        atomicbob, SofaSamuraiX and Lyander like this.
    13. atomicbob
      atomicbob
      Rocking out listening to Alan Parsons - I Robot evaluating 6AS7g tubes in TA-66 with HD800S (unmodified) and Holo Cyan 2 for source.
      1. View previous comments...
      2. atomicbob
        atomicbob
        I listen between 75 and 85 dBSPL which is lower than many listeners. HP drivers are not moving as far which may account for my divergent opinion of HD800S and EQ. I use Sonarworks for HP correction. In my chain I drop level by 7 dB before allowing any EQ. For sub bass boost I insert +7 dB shelf at 15 Hz with Q=0.53 using EQuick.
        Feb 5, 2025
        Riotvan and rlow like this.
      3. Thad E Ginathom
        Thad E Ginathom
        I thought, for a moment, that you were going to say "between 75 and 85 RPM!"
        Feb 6, 2025
        atomicbob and Riotvan like this.
      4. Riotvan
        Riotvan
        @Thad E Ginathom It's possible but you need a power assisted chair and a much longer cable.
        Ah yeah sonarworks is not an option for me(different sources besides pc), i tried it in the past and couldn't quite replicate what they do with other eq software.
        Feb 6, 2025
        atomicbob and Thad E Ginathom like this.
    14. atomicbob
      atomicbob
      It's snowing outside, I have a head cold. Time to sit in front of a fire with treasured cat on lap, cup of tea and hibernate.
      1. zottel, Jinxy245, Slade01 and 17 others like this.
      2. View previous comments...
      3. CEE TEE
        CEE TEE
        Oh yeah, the kids and family have been passing it around and getting waves over the past 2 months. I was holding out as long as I could and then...hopefully only one long wave for me.
        Feb 3, 2025
      4. joch
        joch
        I had one flu after another since early December. I have enough prescribed meds to classify my pee as toxic discharge. Get well soon @atomicbob and all you guys. Wishing everyone good health.
        Feb 4, 2025
      5. atomicbob
        atomicbob
        Wow! Many of you have had some pretty nasty crud! My symptoms are limited to periods of nose running like Niagara Falls, sinus congestion, less than zero energy, cognitive degradation and sleeping a lot.
        Feb 4, 2025
    15. atomicbob
      atomicbob
      Working on a Distortion Surface suite comparison between xDuoo TA-66, BH Crack, and Woo WA3. There are remarkable similarities.
      1. View previous comments...
      2. atomicbob
        atomicbob
        @roshambo123 pardon my ignorance, but in this context what does WCF mean?
        Jan 29, 2025
      3. roshambo123
        roshambo123
        White Cathode Follower
        Jan 29, 2025
      4. atomicbob
        atomicbob
        While all three amps are cathode follower designs, I don't believe they qualify as WCF types. These amps have plate of driver connected to grid of output tube and both tubes have cathode connected to ground via a resistor. No driver cathode to output tube plate connection.
        Jan 29, 2025
        Sqveak likes this.
    16. atomicbob
      atomicbob
      Had a demi tasse of real coffee first time in years. Big mistake. Vibrating with Burning Down the House on continuous loop in my head ...
      1. View previous comments...
      2. Thad E Ginathom
        Thad E Ginathom
        Can't drink it at all. So sad: I love the smell, love the flavour.
        Jan 13, 2025
      3. atomicbob
        atomicbob
        @Thad E Ginathom Apparently I no longer can either. Like you I love the smell and taste, but it doesn't love me.
        Jan 13, 2025
        Thad E Ginathom likes this.
      4. yotacowboy
        yotacowboy
        I, too, cut out most caffeine at the suggestion of my cardiologist. still can't shake my morning cappuccino, but quicker extraction means less caffeine.
        Jan 13, 2025
        Pocomo and atomicbob like this.
    17. atomicbob
      atomicbob
      Breath deep the gathering gloom Watch lights fade from every room Bedsitter people look back and lament Another day's useless energy spent..
      1. Cryptowolf, jag42, yotacowboy and 8 others like this.
      2. View previous comments...
      3. atomicbob
        atomicbob
        Many projects begun, none completed sufficiently for posting.
        Often my feline companion beckons me to sit in front of the fireplace and provide a warm lap with a drink at my elbow.
        Such is life now.
        Dec 6, 2024
      4. atomicbob
        atomicbob
        Tonight offers a great example of enjoying the benefits provided by many years of wisdom gained. Several hours by the fire watching a BW movie from the 1930's with a cat snoring in my lap and enjoying a fine red beverage. Remember to take time for things that matter in your respective lives.
        Dec 6, 2024
      5. Thad E Ginathom
        Thad E Ginathom
        I was thinking it would be John Betjeman or someone like him. Turns out it's The Moody Blues! They didn't appeal to me: maybe I should give them another chance some time.
        Dec 8, 2024
        Cryptowolf and atomicbob like this.
    18. atomicbob
      atomicbob
      Will be investigating hardware of a different purpose: M4 oxygen tanks, regulator and masks to be worn while exercising.
      1. Royaume, GoodEnoughGear, Case and 6 others like this.
      2. Lyander
        Lyander
        May you have good music to keep you company during exercise. Monotonous routines are heavier on the mind than they are on the body IMO
        Nov 1, 2024
      3. atomicbob
        atomicbob
        Music is great to set a workout pace for indoor steps. Outside I prefer the sounds of nature. O2 is to combat an issue I have developed called exercise induced desaturation.
        Nov 1, 2024
      4. joch
        joch
        Good to know you’re keeping to exercising. Staying healthy by staying fit. More power to you, AB!
        Nov 1, 2024
        RestoredSparda, atomicbob and Lyander like this.
    19. atomicbob
      atomicbob
      Fiio FT1 impresses for tonal balance in a closed back at $150. 100 Hz -4dB Q=0.71 fixes the slight perceived thickness. Bargain.
    20. atomicbob
      atomicbob
      Sidetracked again having entered the age of mists, pists and ologists. More specialists added to my healthcare team.
      1. hifiandrun likes this.
      2. View previous comments...
      3. Sqveak
        Sqveak
        There should be a heart button on profile posts like these.
        I can only hope that the results are a perfect score of all clears.
        Sep 20, 2024
      4. joch
        joch
        You’re a brave man. More power to you.
        Sep 20, 2024
        atomicbob likes this.
      5. Thad E Ginathom
        Thad E Ginathom
        Bob, congratulations on surviving it all so far. Long may you continue to do so.

        Cheers!

        One of my granny's stranger proverbs: It's a creaking door that hangs the longest.
        Sep 21, 2024
        Cryptowolf and atomicbob like this.
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  • 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 Spring 2 / 3
    Holo Audio Cyan 2
    Schiit Bifrost2
    Matrix Audio X-Sabre Pro
    Lavry DA11

    Enjoy
    Schiit Yggdrasil A2
    Schiit Gungnir MB A2
    Soekris dac2541

    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
    Schiit Vali 3 with GE JAN 5670w
    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-JAR
    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.