Audio cable topologies used for SE interconnect cables - Page 2
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  1. #11
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    Re: Audio cable topologies used for SE interconnect cables

    I watched the first video and while it was clear it missed some key things of importance wrt RCA twisted pair interfaces.

    Twisted pair cables cancel low frequency interference (hum) that is magnetically induced. Single ended shielded cables do not.

    Shielded cables attenuate high frequency and rf interference but allow low frequency magnetic interference through.


    RCA cables were never intended for balanced systems. The twisted pair construction will eliminate low frequency power line hum but allow most other EMI and RFI over 100 kHz to pass into the amplifier. What happens then is anyone’s guess, the only thing for sure is it will be capricious and inconsistent.

    The best solution is to use balanced XLR cables for balanced systems because they have a shield connected on the sending end of the cable which attenuates the high frequency interference and the twisted pair attenuates the magnetically induced hum component.

    If your amplifier has balanced rca inputs it probably has balanced XLR inputs as well, so use the XLR inputs in that case.
    Tom

    Audio:
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    Nottingham Dais with Sumiko Palo Santos Presentation
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  3. #12
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    Re: Audio cable topologies used for SE interconnect cables

    Well said, Tom. Very easy to understand without dumbing it down. Thank you.
    Gary
    Accuphase E-650; Lumin A1; Roon; Shunyata Delta NR; Kimber 12TC; JLA F112v2; Tannoy Canterbury GR

  4. #13
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    Re: Audio cable topologies used for SE interconnect cables

    Thanks for your reply. The post was to spur up conversation and hopefully make others understand why sometimes there Sound is effected.
    RCA beyond 10 feet max hurts the highs and allows hum or increase noise floor.
    It also stops any iso of ground from one device to the other. Most don't know and worse yet is those who say it's ok.
    Room 20 ft wide 55 ft deep 8 ft high
    the room is custom built
    preamp ML26
    amps ML NO33
    interconnects mogomi gold BAL
    digital three CUST built servers by me
    nas , player pc and dac pc using 10 LPS supplies
    nas is synology hack
    servers Xeon cpu and audio ram win2016 OS customized , AO optimized headless , fanless
    roon player , HQ for dac.
    Network isolated by emo tek and LPS network sw with audio only IP address for traffic control.
    All network cables cat 7 shielded
    usb cable to dac is power and data isolated by true galvanic isolation transformer. Power cut at mainboard.
    Dac lampi




  5. #14
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    Re: Audio cable topologies used for SE interconnect cables

    Gary,
    I’m glad you liked my write up!

    Alrainbow,
    This is indeed a rich subject that bears more coverage. I’m glad you posted your observations and video. It really does matter how audio designers implement their input and output stages. That’s one of the reasons why our systems can be so cable dependent. There is a lot of interaction between the gear and cables.

    I have MIT, Kimber, Audioquest and Mogami RCA cables and they all sound different. There are big differences in these cables - most are shielded, some are unshielded, they all have different geometries and use different materials. Lots of variables. I’m at a loss to fully understand or explain why they sound diffferent. So I just listen and use the one I think sound best.
    Tom

    Audio:
    Amati Futura Mains
    Amati Homage VOX Center,
    Proac Response 1sc Rears,
    Three MC2301's for L,C,R
    MC 602 for the rears
    C 1100, MX 151, MCD 1100, MR 77
    Nottingham Dais with Sumiko Palo Santos Presentation
    SurfacePro 3, JRiver, WW Starlight Platinum USB, Benchmark DAC3 HGC

    Video:
    MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.

    Lake House:
    Ohm F, MC 275V, C2300, MR 80, Rega P3

    OnDeck:
    McIntosh MAC 4300v

  6. #15
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    Re: Audio cable topologies used for SE interconnect cables

    So glad there is such honesty. It's very complex to answer the why.
    Some I can predict by messuting and using formulas if I have know info of ore and amps.
    But the kind of transfer used venders don't speak of or list in specs.
    I am an advide headphone user too. The right imp of hseodones and amps has a huge effect there. The toughest part is knowing how or should sound in getting a bal sound. As you make one thijg better you move away form another
    but knowing some facts of our devices helps
    Room 20 ft wide 55 ft deep 8 ft high
    the room is custom built
    preamp ML26
    amps ML NO33
    interconnects mogomi gold BAL
    digital three CUST built servers by me
    nas , player pc and dac pc using 10 LPS supplies
    nas is synology hack
    servers Xeon cpu and audio ram win2016 OS customized , AO optimized headless , fanless
    roon player , HQ for dac.
    Network isolated by emo tek and LPS network sw with audio only IP address for traffic control.
    All network cables cat 7 shielded
    usb cable to dac is power and data isolated by true galvanic isolation transformer. Power cut at mainboard.
    Dac lampi




 

 
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