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Thread: Best phono stage

  1. #391
    VIP/Donor [WBF Founding Member] ack's Avatar
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    Capacitance is critical for MM. Pass also believe it makes a difference for MC but I disagree and took mine out
    Sources: mod. VPI Aries 3;mod. JMW 10.5i/Ortofon A90;mod. Pass XP-25;Spectral 3000SL xport/mod. Alpha DAC;mod. Magnum Dynalab Etude;mod. Revox B-77II Amplification: Spectral DMC-30SV/DMA-400RS Speakers: Heavily mod. MartinLogan (custom Mundorf xover, cabling, woofers; structural mods);mod. REL Cabling: MIT Oracle 50ic,MA-X/Oracle 90.1 Power: MIT Z-Strip, Magnum Z-Trap; Shunyata Black Mamba CX HC cords, Typhon Tweaks: EAR Isodamp c1002 References: Live unamplified music
    System link WBF

  2. #392
    Member Sponsor Senior Member Barry's Avatar
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    Quote Originally Posted by PeterA View Post
    I once briefly played around with the various settings, but I did not notice a sonic difference. Of course, I did not know what to listen for.
    For most low inductance MCs, even if you're a bat, the resonant frequency is so high there's no way you'd hear anything!

  3. #393
    Senior Member Pb Blimp's Avatar
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    Ahh, that makes sense. Thanks guys.
    Paul

    Power - Torus 75 amp WMT. Furutech NCF Lines, Outlets and PC's. Star ground system.
    Cables - Nordost Valhalla 2 and Odin (phono).
    Analog Source- ARC Ref 10 Phono. Acoustic Signature Ascona MKII and TA-9000 Tonearm. Lyra Atlas.
    Amplification - Soulution 721 Preamp and 501 Monos.
    Speakers - Raidho D3.1
    Room Acoustics - Design by Acoustic Frontiers. RPG Bass Plates, RPG Absorption and Diffraction, and Custom built Helmholtz Traps.
    Stands - Solid Walnut by Timber Nation.

  4. #394
    [Industry Expert] Addicted to Best! Atmasphere's Avatar
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    Quote Originally Posted by PeterA View Post
    Ralph, my Pass phono has a dial for capacitive loading along with the resistive loading that we have been discussing. Could you please explain what capacitive loading is and why it is needed? The range is 100 to 750 in six increments. I have set mine at 100 which is the lowest setting and basically left it there since I bought the unit. I once briefly played around with the various settings, but I did not notice a sonic difference. Of course, I did not know what to listen for. Thank you.
    As mentioned, capacitance is used for loading MM cartridges. Jim Hagerman covered this in the article I linked earlier; there are several calculators embedded in that article which can be helpful. Here is the link again:
    http://www.hagtech.com/loading.html
    Atma-Sphere Music Systems, Inc. (http://www.atma-sphere.com)

  5. #395
    VIP/Donor [WBF Founding Member] ack's Avatar
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    And since virtually no one reads the links in their entirety, here is the summary

    Summary
    • Minimal loading capacitance is best
    • Moving coil types have far greater frequency response
    • Load resistance tunes damping
    The line is bold has been a well known fact for years
    Sources: mod. VPI Aries 3;mod. JMW 10.5i/Ortofon A90;mod. Pass XP-25;Spectral 3000SL xport/mod. Alpha DAC;mod. Magnum Dynalab Etude;mod. Revox B-77II Amplification: Spectral DMC-30SV/DMA-400RS Speakers: Heavily mod. MartinLogan (custom Mundorf xover, cabling, woofers; structural mods);mod. REL Cabling: MIT Oracle 50ic,MA-X/Oracle 90.1 Power: MIT Z-Strip, Magnum Z-Trap; Shunyata Black Mamba CX HC cords, Typhon Tweaks: EAR Isodamp c1002 References: Live unamplified music
    System link WBF

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