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Path: utzoo!linus!philabs!seismo!rochester!rocksvax!dave
From: dave@rocksvax.UUCP (Dave Sewhuk)
Newsgroups: net.audio
Subject: Re: Speaker wire: reader reactions - (nf)
Message-ID: <947@rocksvax.UUCP>
Date: Thu, 13-Oct-83 12:04:52 EDT
Article-I.D.: rocksvax.947
Posted: Thu Oct 13 12:04:52 1983
Date-Received: Fri, 14-Oct-83 23:12:28 EDT
References: <1970@hp-pcd.UUCP>, <937@watcgl.UUCP> <689@drufl.UUCP>
Organization: Xerox, Rochester, N.Y.
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I have to wonder about all this hoopla about speaker wire.  How this
test was made?  Was it conducted in a "double-blind" environment where
none of the participants knew what combinations of wires were used?  
Peoples expectations could color the outcome of the test!  Some of the
combinations of wires seemed to me to be electrically equivalent.  The
only differences would have been the zip cord to the "big" wire.

The trusty Electronics Engineers' Handbook says that #3-#5 are essentially the
same wire.  I am ignoring the Litz effect due to that fact that the
skin effect in the wires at those frequencies is negligable, hence
it was a waste to do in the first place.  Tin is a much worse conductor than
copper so its contribution to increasing the copper cross area is also
negligible, unless of course it really is thick on the wire.

Copper cross area:
	#9:	.01028"
	#10:	.008155"
	#12:	.00513"
	#25*19:	.004788"
	#30*65:	.0051025" therefore

	wire 3 = .008155"	wire 4= .00992"		wire 5= .01023"

For the range of observed differences, I find it hard to believe that
your test results are valid, sorry. Those wires are essentially 9-10 gauge
wires.  Also how long was each wire, I don't recall you mentioning that
parameter.

If you are going to give us results of subjective materials, let us know
the method the scoring was done.  If the vote was done by consensus then
the results are probably the same as the most outspoken person or the
one who answered first.

Unless the results were voted on in secret and the participants did not
know what wire was used at each phase of the test you might as well have
not reported the results.

Can feel the heat rising now, Dave
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