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Re: [ARSCLIST] Aren't recordings original sources?

Bob, are you talking about a power cord with a foil shield like a standard audio cable? I thought UL or some other standards body wants a solid green-wire, same gauge as the two conductors. Is the shield a separate wire? Is it connected to the greenwire ground? What are you sheilding, fuzz from coming off the power conductors or fuzz from coming in from the outside?

-- Tom Fine

----- Original Message ----- From: "Bob Olhsson" <olh@xxxxxxxxxxxxx>
To: <ARSCLIST@xxxxxxxxxxxxxxxx>
Sent: Friday, October 17, 2008 9:18 AM
Subject: Re: [ARSCLIST] Aren't recordings original sources?

-----Original Message-----
From Tom Fine: "... do you think powerline fuzz and hash matter more, less
or none to modern gear that uses
cheaper/lightweight and switching-type power supplies? I'd think the
old-school stuff wouldn't care,
it was designed to operate on the principle of an over-spec'd power supply
providing a large reserve
for peak-power demands after the conversion to DC. But some of these modern
devices -- including
well-rated professional gear -- seem to have such flimsy power supplies, I
wonder if all this
matters more in that world. Plus, there are arguments to be made about the
quality of internal power
and the performance of digital devices, but again what is provided on the
gear may well be up to the
job in the case of professional-grade equipment. Bottom line, I highly doubt
what sort of power cord
you use as long as you're using properly-spec'd gauge wires, matters in any
of this..."

I've heard power cords make a surprising difference especially shielded vs.
non-shielded. Tying every neutral in an audio system together at one point
makes a bigger difference as does cleaning and tightening every single AC
connection all the way back to the power pole. Doing both in my experience
has reduced the effect of AC cords considerably.

You can ask anybody in the touring sound business and they'll talk your ear
off for an hour about the incompetent power supply and grounding design
found in most of the past 40 years worth of so-called "pro" audio gear and
there is no reason to expect consumer audio to be any better. When you
consider how little AC wiring has even been touched in a half century and
how poorly designed most gear is, it shouldn't be surprising that anything
that alters the frequency response of an audio grounding system may well be
audible due to different flavors of RFI. Obviously if you can hear anything
change, all flavors are wrong but those of us who hear this stuff aren't
lunatics and at least some of us are pretty happy with a heavy duty, well
shielded $20 power cord.

Bob Olhsson Audio Mastery, Nashville TN Mastering, Audio for Picture, Mix Evaluation and Quality Control Over 40 years making people sound better than they ever imagined! 615.385.8051 http://www.hyperback.com http://www.thewombforums.com

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