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Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


    Long Speaker Wires/Short Interconnects or Long Interconnects/Short Speaker Wires?

    knotscott
    knotscott

    Posts : 34
    Join date : 2019-12-28
    Location : Rochester, NY

    Long Speaker Wires/Short Interconnects or Long Interconnects/Short Speaker Wires? Empty Long Speaker Wires/Short Interconnects or Long Interconnects/Short Speaker Wires?

    Post by knotscott on Sun Jul 26, 2020 8:34 am

    The title pretty much sums up the question.  After discovering a 30' set of Canare Cable interconnects that I forgot I had, I now have a choice.  I’m currently running the 30’ runs of 12 awg OFC speaker wire and 6’ solid silver IC runs.  It’s sort of a big job to switch things out just to experiment, so before tear anything apart, I was wondering which scenario has the most benefit to sound? FWIW, I think the current setup sounds great, but that doesn’t mean the other scenario couldn’t sound better.

    Also, I've read that amplifier input and output impedance can be factors in this decision.  Are there any specs like this for a Dynaco/VTA ST-70 mod?  My preamp is a Lazarus Cascade Basic with (4) 12AX7s....not sure of the output impedance of that either.
    PeterCapo
    PeterCapo

    Posts : 921
    Join date : 2008-12-05

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    Post by PeterCapo on Sun Jul 26, 2020 1:58 pm

    It could be fine either way, but I'm inclined to say go with shorter interconnects and longer speaker wire. Interconnects are usually shielded with capacitance increasing with length, which makes it harder for the preamp to drive, though some preamps are more susceptible to this than others.

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    peterh
    peterh

    Posts : 1434
    Join date : 2012-12-25
    Location : gothenburg, sweden

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    Post by peterh on Sun Jul 26, 2020 3:51 pm

    knotscott wrote:The title pretty much sums up the question.  After discovering a 30' set of Canare Cable interconnects that I forgot I had, I now have a choice.  I’m currently running the 30’ runs of 12 awg OFC speaker wire and 6’ solid silver IC runs.  It’s sort of a big job to switch things out just to experiment, so before tear anything apart, I was wondering which scenario has the most benefit to sound? FWIW, I think the current setup sounds great, but that doesn’t mean the other scenario couldn’t sound better.

    Also, I've read that amplifier input and output impedance can be factors in this decision.  Are there any specs like this for a Dynaco/VTA ST-70 mod?  My preamp is a Lazarus Cascade Basic with (4) 12AX7s....not sure of the output impedance of that either.
    If the poweramp can be remote controlled then a proximity to the speakers has some advantages, it's
    easier to stuff away, it might be located at a well ventilated place that does not head other stuff or
    records.
    If it cannot be remote controlled a location close to the preamp is preferred.

    Other things to consider is the output impedance of the pre; it has to be able to drive the longer cables.

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    OneyedK

    Posts : 10
    Join date : 2016-12-05

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    Post by OneyedK on Mon Aug 17, 2020 1:44 pm

    knotscott wrote:I’m currently running the 30’ runs of 12 awg OFC speaker wire and 6’ solid silver IC runs.
    In an ideal world, both IC's and speaker wires should be as short as possible...

    However, in the real world, when you drive your speakers with a tube amp, damping factor isn't that great to begin with,
    so "long" speaker wires only make matters marginally worse. There is of course a penalty to pay for the added capacitance and inductance,
    depending on length and type of cable.

    If you were to drive your speakers with an amp with very low output impedance (high damping factor),
    even relative short lenghts of speaker wires, would ruin the advantage of that amp.

    Between the pré and the power amp however, both the drive capability of the pré (long IC's mean a lot of capacitive loading) and
    the relative high input impedance of the power amp will determine the outcome...

    If it sounds great, leave the gear alone, buy more records and enjoy the music! cheers

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