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From: pmr@drutx.UUCP (Rastocny)
Newsgroups: net.audio
Subject: Re: ultimate speaker cable
Message-ID: <2653@drutx.UUCP>
Date: Tue, 30-Apr-85 16:14:41 EDT
Article-I.D.: drutx.2653
Posted: Tue Apr 30 16:14:41 1985
Date-Received: Wed, 1-May-85 04:29:54 EDT
References: <70@harvard.ARPA> <268@moncol.UUCP> <326@rtech.ARPA> <1118@hound.UUCP>
Organization: AT&T Information Systems Laboratories, Denver
Lines: 46

[]

OK, OK.  You've got my attention now.  For those of you who listen with your
wallet, listen to 12-gauge zip and be happy.  For those of you who listen with
your ears, there's a recent publication by Hitachi (No. TD 23-929, December,
1984) that explains in detail their theory on why esoteric wires sound better
than standard cupric types.  

Excerpts follow:
"...The author (Osao Kamada, Chief Engineer) first proposed a theory that
copper bioxide (Cu2O) impurity contained in conventional copper as
semi-conductive material interrupts linear transmission of audio signals and
finally created created perfect copper structure named LC-OFC (linear crystal
oxygen free copper) for a wide range transmission, i.e., audio and video.

"...sound effect of OFC Conductor evaluated by famous music artists, crytics
and audio engineers for these seven or eight years.  It is evaluated as
followings.
	(1) rich and transparent
	(2) sounds wide range to both side low and high
	(3) exact orientation
	(4) sharp sound image
	(5) crisp transient "

Although the translation suffers (cupric bioxide Cu2O???), I think you get the
general idea.  The article continues explaining that there was no obvious
measurable difference from standard laboratory evaluation techniques to
explain these observations.  Then it continues saying that its the capacitance
that this copper-oxide junction introduces that effects the linear transmission
properties.  "...like having 50,000 small capacitors in series with the wire
per meter."  Their manufacturing technique reduced this amount to about 2,000
per meter.

Reprints of this article are available for a small fee from
	
	Hitachi Cable America, Inc.
	777 Third Avenue
	New York, NY 10017

It's nice to know that scientists have finally measured what golden ears have
claimed to hear for years.

		Yours for higher fidelity,
		Phil Rastocny
		AT&T-ISL
		ihnp4!drutx!pmr