System Synergy - Special Sound

Discussion in 'General Audio Discussion' started by atomicbob, Sep 28, 2015.

  1. jexby

    jexby Posole Prince

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    @batriq there is an Eitr and Gungnir Multibit available from @Ray if the FS section.
     
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  2. batriq

    batriq Probably has made you smarter

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    Yeah, I saw. I was hoping to buy the Gungnir Multibit with Analog2 if/when it comes out.

    Here's a pic BTW :)
    [​IMG]
     
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  3. slankoe

    slankoe Tongue tastes of LH butthole

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    For what it's worth I find Modi Multibit to be very excellent with SEX 3.0 and my cans, and yet Gungnir Multibit with that combo is even more excellent. Both of them I consider pretty sweet devices, particularly the latter which originally opened my eyes (ears) to the multibit sound. Many thanks to the kind local enthusiast who loaned me his personal unit!

    Eventually I bought the Modi MB - but given enough time I went and got myself a Gungnir Multibit of my own. I am very pleased with the result, it is a solid upgrade. Modi Multibit does amazingly well for it's price, but it sounds somewhat lesser in comparison to it's big brother. The manner in which Gungnir Multibit readily serves up low-level detail and microdynamics on a smooth, and spacious stage is just addicting as hell.
     
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  4. batriq

    batriq Probably has made you smarter

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    Thanks @slankoe. It's great to hear that the SEX scales with the Gungnir Multibit. BTW, I put in my L-pad, which allows me to use more of the volume pot. Here are the instructions (it's been a while so I think my images were taken down(?): https://bottlehead.com/smf/index.php?topic=7252.0
     
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  5. atomicbob

    atomicbob dScope Yoda

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    I was in a hurry and didn't create the mousepad cutouts necessary to avoid blocking ventilation holes on the dac1421. Result after brief photo session was black rubber marks on the dac1421 top surface. Took awhile to clean off. Custom cut mouse pad separators now created.
     
  6. atomicbob

    atomicbob dScope Yoda

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    They are 5.5 cm in diameter. Need to leave a minimum of 0.5 cm between them. It might be too close for your wonderful sounding Liquid Glass.
     
  7. Hammy

    Hammy Friend

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    Those Psvane 6SN7-SE tubes aren't going to fit. Not enough space behind and to the sides for them to fit. Negative clearance. Unless I find some 6 cm high tube socket risers...

    I have been thinking about trying the Psvane CV181 tubes.
     
  8. atomicbob

    atomicbob dScope Yoda

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    Sorry @Cspirou , I somehow missed this. Yes, there will be measurements sometime. Not sure they will happen before my multi-week break.
     
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  9. Cspirou

    Cspirou They call me Sparky

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    No prob Bob. I just like knowing what's in the measurement queue no matter where it's prioritized.
     
  10. atomicbob

    atomicbob dScope Yoda

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    atomicbob's nuclear schiit

    Listening to this system for several weeks. Was demonstrated at the Seattle Summer Can Meet.
    Important to note Modi MB is v2 firmware in this system.

    01 Eitr - mc-3+ LiveClock + FS725 - Modi MB v2 - Lyr3 6SN7SE - HD800J - small.jpg

    Hardware block diagram:
    02 20180812 Dual USB Eitr - Mutec 3+ - LiveClock - FS725 - Modi MB - Lyr3 - HD800.png

    IVS setup for this system:
    03 IVS overview.png

    Digital flutter management (jitter):
    04 20180727-03 Modi MB SE inferred jitter - 7 KHz BW - MC-3+ + LiveClock + FS725.PNG

    Digital wow management (wander):
    05 20180801-1400 5384A Mutec MC-3+ frequency drift overview - annotated.png

    Expanded y-axis view of LiveClock with - without - with Rubidium reference disciplining:
    06 20180801-1400 5384A Mutec MC-3+ frequency drift zoom.png
    All that can be measured during FS725 disciplining of LiveClock (before and after) is HP 5384 LSB toggle. Middle section is LiveClock running on internal clock alone. Not too shabby but not as good as with FS725 engaged. HP5384 frequency counter time reference was obtained from a Jackson Labs Fury GPSDO with Allan Deviation an order of magnitude more precise than the Rubidium time reference.

    This fellow is doing something similar in the world of karts - a visual analogy.
    07 Kart_with_turbo_engine.png

    For those with a burning desire to know system BOM:
    08 20180812 Headphone System List Eitr MC-3+ LiveClock FS725 Modi MB v2 Lyr3 HD800 Jmod - IVS.png

    The proof is in the listening. I've been very pleased with the results of this system's synergy.

    Before anyone contemplates replicating this system, I can justify the FS-725 Rubidium time reference for lab frequency counters, Antelope LiveClock provides house clock to project studio as needed, and the MC-3+ was already in lab inventory.

    Consider the Eitr, Modi MB v2 firmware, Lyr3 + PS Vane 6SN7-UK, HD800 modded to suit personal preferences and my IVS will deliver a high percentage of this system's performance.
     
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  11. johnjen

    johnjen Doesn’t want to be here but keeps posting anyways

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    Those short term vs long term comparisons of the signal stability are most intriguing.
    It makes me wonder what identifiable acoustic aspects result from those series of tweaks.

    And the Fury reference master clock is intriguing to contemplate as well.

    Thanks for that in depth look see. :)

    JJ
     
  12. batriq

    batriq Probably has made you smarter

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    I have been more and more pleased with the combination of Gungnir Multibit (recent purchase, with Gen5), SEX 2.1 that I built, and stock HD650. I no longer feel the need to tweak or change my headphone setup. Most recently my son kicked me off the listening chair:

    The little dongule is a voltage divider I built since the SEX is too powerful.
     

    Attached Files:

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  13. atomicbob

    atomicbob dScope Yoda

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    atomic unicorn

    atomic unicorn - small.jpg

    BOM
    20181011 Mutec 3+ - LiveClock - FS725 - dac1421 - Liquid Crimson - HD800.png

    Clock wander updated - measured with
    Keysight 53220A + Jackson Labs Fury time reference (stratum 1 ref)

    20181001-1045 MC-3+ clock drift - int - LC - LC+FS725 - overlaid.png

    Clock wander zoom for Antelope Live Clock vs FS725 rubidium time reference
    20181001-1045 MC-3+ clock drift - LC - LC+FS725.png

    Clock wander - Mutec MC-3+ internal clock after 4 hrs warmup
    20181001-1045 MC-3+ clock drift - internal.png

    A transparent, engaging system. With such great time references I seem to lose track of time during recreational listening sessions with this combination.
     
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  14. atomicbob

    atomicbob dScope Yoda

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    Nuclear ZDT Jr.

    20 nuclear ZDT Jr - small.png.jpg

    BOM
    20181015 System List RDL SF-ND2 MC-3+ LiveClock FS725 Modi MB v2 ZDT Jr HD800 Jmod - IVS.png

    System Architecture Diagram
    20181015 RDL SF-ND2 - MC-3+ - LiveClock - FS725 - Modi MB - ZDT Jr - HD800.png


    Now that I have the residual hum below audible thresholds, ZDT Jr. joins the illustrious headphone amp collection worthy of the atomic treatment. When I am really wanting to lose track of time, putting the final icing on the cake, I substitute yggdrasil A2 for the Modi MB v2.
     
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  15. johnjen

    johnjen Doesn’t want to be here but keeps posting anyways

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    I just had to laugh.

    Enlarge the pic and it's all topped of by a ModiMB .

    It's like the least expensive except for the cables and s/w, part of the whole stack.

    Yeah reducing hum on tube gear can be 'problematic'.

    I just tested my BIG eyerrrrrnnnnn amp after its latest re-wire job, and the hum is now WAY better.
    Still a ways to go yet but round 3 is already underway.

    JJ
     
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  16. Priidik

    Priidik MOT: Estelon

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    Rubidium Clock --> a Modi o_O
    You are an artist.
     
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  17. atomicbob

    atomicbob dScope Yoda

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    Thank-you, it is a balance between science and art.

    Modi MB v2 firmware inferred jitter - with Eitr
    02 20180727-01 Modi MB SE inferred jitter - 7 KHz BW - Eitr.PNG

    Modi MB v2 firmware inferred jitter - with Eitr + Mutec MC-3+USB
    03 20180727-02 Modi MB SE inferred jitter - 7 KHz BW - Eitr + MC-3+.PNG

    Modi MB v2 firmware inferred jitter - with Mutec MC-3+USB + Antelope LiveClock + FS725 rubidium time reference
    04 20180727-03 Modi MB SE inferred jitter - 7 KHz BW - MC-3+ + LiveClock + FS725.PNG
    Noise floor looks lower but the trace was shifted downward by 9 dB so it would display nicely on the next screenshot. Noise floor is actually the same as the previous two measurements.

    Comparison of the three reclocking / clock management methods
    05 20180727-20 Modi MB SE inferred jitter - Full BW - comparison.PNG
    Note the blue trace has been shifted downward by 9 dB for visual clarity

    Comparison of the three at 350 Hz BW zoom
    06 20180727-30 Modi MB SE inferred jitter - 350 Hz BW - comparison.PNG

    Modi MB v2 firmware responded well to lowered phase noise of FS725 + LiveClock disciplining of MC-3+ reclocking spdif.

    This is an excellent jitter response, one few other DACs achieve, even with atomic clock disciplining.
     
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  18. gefski

    gefski Facebook Friend

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    Ah, the most affordable Dante file delivery yet -- just two channels and PoE power, right?
     
  19. famish99

    famish99 Friend

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    @atomicbob Is there a reason you don't feed the 10MHz ref clock to the Mutec directly, is its PLL performance poor?
     
  20. atomicbob

    atomicbob dScope Yoda

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    Correct. And easy to substitute LPS for SMPS on appropriate PoE adapter cable if desired. I used the supplied SMPS and my Noise Nuke. Worked well.

    Mutec MC-3+ didn't perform as well directly connected to 10 MHz reference as when the LiveClock was used to down convert 10 MHz to word clock, typically 88 KHz for me.
     
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