atomicbob
Last Activity:
Mar 26, 2024 at 9:18 PM
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Gender:
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Location:
On planet
Occupation:
acoustic research scientist

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atomicbob

dScope Yoda, Male, from On planet

Pyrate BWC MZR

Beginning the journey into the next stage of my life cycle. Over 100 ultrasound images taken of my heart and cardiovascular system. Mar 18, 2024

atomicbob was last seen:
Mar 26, 2024 at 9:18 PM
    1. atomicbob
      atomicbob
      Really? 20 minute limits to editing posts are back??? Kind of messes with my technical measurements posting methods.
      1. cskippy
        cskippy
        I think good compromise would be that you can't delete your original text but you can add to it. Not sure if this is possible to do though.
        Apr 8, 2018
    2. atomicbob
      atomicbob
      Updated MCTH measurements with replaced EH 6922
      1. JustAnotherRando, Case, Vtory and 7 others like this.
      2. atomicbob
      3. Elnrik
        Elnrik
        Damn fuzzy tubes!! Good thing those EHs are cheap. Thanks for the retest.
        Apr 2, 2018
      4. Azimuth
        Azimuth
        #tubelife
        Apr 2, 2018
    3. atomicbob
      atomicbob
      Appreciate the good points and notes of appreciation for technical measurements - the tutorials are also time consuming
      1. Lyander, A1Gear, Cryptowolf and 4 others like this.
      2. View previous comments...
      3. atomicbob
        atomicbob
        I have a philosophy that ignorance is curable but stupidity is forever. I don't mind answering well formed ignorant questions. We are all ignorant about many topics beyond our scope of knowledge.
        Apr 2, 2018
        Lyander, GanGreinke and Elnrik like this.
      4. Azimuth
        Azimuth
        You are doing a great job! Continue to answer why the measurements look the way they do and hopefully you will less questions. Especially why your measurements might differ from published specs.
        Apr 2, 2018
        Elnrik and atomicbob like this.
      5. atomicbob
        atomicbob
        @rtaylor76 - see today's update on the MCTH about tube EH6922 variance.
        Apr 2, 2018
    4. atomicbob
      atomicbob
      Bumped my head today and a devilishly natural principle revealed itself to me ...
      1. Elnrik likes this.
      2. View previous comments...
      3. frenchbat
        frenchbat
        Stress relievers always good for health
        Mar 18, 2018
        atomicbob and Ringingears like this.
      4. Ringingears
        Ringingears
        I like the sound of that set-up. Or maybe the ZDT Jr.
        Mar 18, 2018
        atomicbob likes this.
      5. atomicbob
        atomicbob
        In the drop for a ZDT Jr. I expect it and the MCTH to be a kickbutt complimentary pair. Amazing the level of performance available to us for far less money than either of the bigger brethren. Have yet to pull out the Liquid Crimson for a direct comparison currently so enamored with the combination listed above.
        Mar 18, 2018
        Elnrik and Ringingears like this.
    5. atomicbob
      atomicbob
      Getting old means never having to say you're sorry .... for letting loose with window rattlers!
      1. Azimuth, Ringingears, Dino and 4 others like this.
      2. JK47
        JK47
        RRRRRRRRRiiiiiiippp
        Mar 17, 2018
        atomicbob likes this.
    6. atomicbob
      atomicbob
      Raising a glass of red to Stephen Hawking while listening to Great Gig in the Sky.
      1. View previous comments...
      2. Cspirou
        Cspirou
        I got a glass of Chivas Regal 21yo Diamond Jubilee. But the bottle itself was bought 30 years ago so this is actually 50 year old scotch. I'm not a cosmologist but Hawking is one of the people I looked up to that lead me to study physics. Simply amazing what he could do with the cards he was dealt.
        Mar 15, 2018
        Ringingears and atomicbob like this.
      3. Thad E Ginathom
        Thad E Ginathom
        He must have had a ticket for Hotblack Desiato.
        Mar 16, 2018
        atomicbob and Cspirou like this.
      4. Ringingears
        Ringingears
        I haven’t been able to say anything about this until today. He was a hero to me. I dedicated “Science Friday” to him this week. Showed my students two short bios on him, and then the clip from Big Bang Theory where Sheldon faints when Hawking tells him he made an arithmetic error on page two. https://youtu.be/7mc5z4LIsqE
        Mar 18, 2018
    7. atomicbob
      atomicbob
      Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it.
      1. Merrick
        Merrick
        I hope to get there someday.
        Mar 6, 2018
      2. atomicbob
        atomicbob
        Elwood P. Dowd - Harvey. And my sentiments exactly.
        Mar 6, 2018
        Ringingears likes this.
      3. Ringingears
        Ringingears
        One of my favorites. And also my sentiments at this point in my life.
        Mar 18, 2018
        atomicbob likes this.
    8. atomicbob
      atomicbob
      Focal Clear is a very interesting listen - I may look to acquire a pair. Vendor suggestions welcome.
      1. Azteca, Melvillian, dmckean44 and 2 others like this.
      2. View previous comments...
      3. landroni
        landroni
        How do you manage the level-matched comparisons? Three identical amps set up for each headphone, or do you redo the level calibration each time you switch headphones?
        Mar 4, 2018
      4. Cspirou
        Cspirou
        @iandroni - He has the RME ADI-2 DAC/Amp which has independent volume controls for the outputs and I think you can save settings too. Shouldn't be too hard with that.
        Mar 4, 2018
      5. atomicbob
    9. atomicbob
      atomicbob
      When the going gets weird, the weird turn Pro.
      1. Dino, dmckean44, Poleepkwa and 9 others like this.
    10. atomicbob
      atomicbob
      Staying in a lighthouse in Bellingham WA. The 360 degree view at the top is spectacular, as is the Beaucastle Chateauneuf-du-Pape.
      1. Torq
        Torq
        Enjoy the down-time! And the Beaucastle! Polished off our last bottle of the '92 last week. Hate when that happens ;)
        Feb 22, 2018
    11. atomicbob
      atomicbob
      Yggdrasil Technical measurements are up - added a few pictures to the first post. I think I'm done editing now. Going on vacation soon.
      1. Azteca, Dino, obsiCO and 11 others like this.
      2. Mithrandir41
        Mithrandir41
        Good job, Bob! Go enjoy yourself.
        Feb 20, 2018
      3. Cspirou
        Cspirou
        You deserve it!
        Feb 20, 2018
        dmckean44 likes this.
      4. Kattefjaes
        Kattefjaes
        Thanks for that. Enjoy your downtime!
        Feb 20, 2018
    12. atomicbob
      1. obsiCO, lerrens, A1Gear and 7 others like this.
      2. insidious meme
        insidious meme
        All right, AtomicBomb!
        Feb 11, 2018
        Melvillian likes this.
      3. Melvillian
        Melvillian
        Great stuff. Thank you!
        Feb 11, 2018
      4. atomicbob
        atomicbob
        Now go listen to Tom Waits - Step Right Up - puts everything into perspective.
        Feb 11, 2018
    13. atomicbob
      atomicbob
      I've been in and out of urgent care for the last several days with cardiac episodes. Nothing life threatening yet; mostly annoying.
      1. Thenewerguy009, Case and Bill-P like this.
      2. View previous comments...
      3. BillOhio
        BillOhio
        Best Wishes for your good health.
        Feb 9, 2018
        atomicbob likes this.
      4. atomicbob
        atomicbob
        Holter monitoring is so much fun, not. Hang in there @Colgin .
        Feb 9, 2018
      5. Thad E Ginathom
        Thad E Ginathom
        @Kunlun's advice sounds good, and I gather he's qualified too, so you'd better take it! :)

        Wishing you well...
        Feb 10, 2018
    14. atomicbob
      atomicbob
      Sigh ... another person with money, some technical background but insufficient measurement experience ....
      1. View previous comments...
      2. atomicbob
        atomicbob
        Measurements, blind listening tests, long term subjective listening are all tools in the tool box. Only a fool will stubbornly put all faith in any single one over the others. Even with all three available as a guide, we still have personal preferences which always trumps the first three, for the individual, not the collective.
        Feb 6, 2018
      3. Grahad2
        Grahad2
        He's bungled many measurements and refused to admit it before later publishing a quiet update.
        Feb 6, 2018
        9suns and atomicbob like this.
      4. atomicbob
        atomicbob
        Thank-you for the perspective @Grahad2 . It helps sort out the knows from the don't knows. This fellow definitely falls in the don't knows category from the data currently available.
        Feb 7, 2018
    15. atomicbob
    16. atomicbob
      atomicbob
      After the weekend SSD disruption SSD health appears good, data intact, apps functional except Benchvue. Support contacted.
      1. Thad E Ginathom and Cspirou like this.
      2. atomicbob
        atomicbob
        For those interested:

        Top-level Exception
        Type: System.TypeInitializationException
        Message: The type initializer for 'System.Windows.Media.Fonts' threw an exception.
        Source: PresentationCore

        Inner Exception1
        Type: System.IO.FileFormatException
        Message: No FontFamily element found in FontFamilyCollection that matches current OS or greater: Windows7SP1
        Source: PresentationCore
        Jan 22, 2018
      3. atomicbob
        atomicbob
        Found the problem. MS .net Jan 2018 monthly "quality rollup" created the fault :https://github.com/dotnet/announcements/issues/53. Fix recommended restores proper operation. Also received a prompt response from Keysight with the very same information. Benchvue crash reporting system is awesome. Back in business.
        Jan 22, 2018
      4. atomicbob
        atomicbob
        Wonderful to have several problems develop simultaneously, apparently related but are actually independent. Story of my life. Like unmuting FOH master fader and some asshole drops a crate offstage at just that moment.
        Jan 22, 2018
        Thad E Ginathom likes this.
    17. atomicbob
      atomicbob
      Bad way to start the day - primary lab computer took a ssd dump. Diagnostics and recover in process.
      1. View previous comments...
      2. atomicbob
        atomicbob
        During my SSD failure some corruption of BenchVue licensing has occurred which will require attention. This will impact the USB cable measurements update. Other than that, lab computer is running again. SSD appears to be fine, though an overnight run of chkdsk is in order.
        Jan 21, 2018
        Thad E Ginathom likes this.
      3. Grahad2
        Grahad2
        After hearing enough ticks of doom I keep everything important on SSDs. Which still do fail, but typically last (wayyy) long enough past their 0 MWI mark that you really should have backed it up.
        Jan 21, 2018
      4. Thad E Ginathom
        Thad E Ginathom
        It does not go by components. Somebody should write a song called "Fifty ways to loose your data!"

        My cycle is weekly. Sometimes it stretches to two, but it includes an off-site copy swap. Even if the house burnt down (its been flooded, but I kept the PC dry) I would not loose my entire digital life.
        Jan 22, 2018
        atomicbob likes this.
    18. atomicbob
      atomicbob
      Happy to see so many find the FFT visual tutorial worth their time to peruse. Please let me know of any errors or improvements to be made.
      1. Lyander, A1Gear, yotacowboy and 2 others like this.
    19. atomicbob
      atomicbob
      Yeehaw! It feels so good when it quits hurting. Episode over. Back to being a NC again.
      1. Luckbad
        Luckbad
        I need more like buttons than are available.
        Jan 18, 2018
        GoodEnoughGear likes this.
      2. atomicbob
        atomicbob
        Thank-you all. Today is starting out well. As Cyrille Aimee sings, "It's a Good Day".
        Jan 19, 2018
        Luckbad likes this.
    20. atomicbob
      atomicbob
      sometimes I feel guilty ... then again sometimes I selfishly just enjoy the music ...
      1. View previous comments...
      2. Melvillian
        Melvillian
        Nothing selfish about it. You already do more than 90% of us combined.

        Right channel on my crack hasn’t been working for a while. I really miss listening to it. Will have to spend the time and figure out what’s going on with it
        Jan 15, 2018
      3. atomicbob
        atomicbob
        Thank-you all. I was a little down after recently sustaining a 76 hr afib episode. The "selfish" part is partly tongue-in-cheek. Enjoying the music should remain top priority for everyone. I check out the what are you listening to now thread regularly and have been adding new music at an unprecedented rate, well for me anyway.

        @Melvillian - fix that Crack. You will be glad you did.
        Jan 16, 2018
        Dino likes this.
      4. Melvillian
        Melvillian
        I really do need to fix it. I think I’ll start with rewiring the amp. It’s a complete mess from all the mods I’ve bolted on. Probably good to revert the amp back to its simple form and see what happens.
        Jan 16, 2018
        atomicbob likes 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 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.