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- Newsgroups: rec.audio
- Path: sparky!uunet!cis.ohio-state.edu!news.sei.cmu.edu!rsd
- From: rsd@sei.cmu.edu (Richard S D'Ippolito)
- Subject: Re: Very expensive cables
- Message-ID: <1992Sep10.151345.20375@sei.cmu.edu>
- Sender: netnews@sei.cmu.edu (Netnews)
- Organization: The Software Engineering Institute
- References: <1992Sep9.181941.13496@ncsu.edu>
- Date: Thu, 10 Sep 1992 15:13:45 GMT
- Lines: 54
-
-
- In article <1992Sep9.181941.13496@ncsu.edu>, Dan Kester asks:
-
- > A question for all the posters who say there are no differences between
- > cables:
- > Have you actually tried listening to different cables in a reasonably good
- > high-end system?????
- > Or is your "no difference" opinion based on what you were told in engineering
- > school?
-
- Gee, Dan, what they teach us in engineering school brought you audio in the
- first place, and is what keeps buildings standing, bridges bearing loads,
- cars running, airplanes flying, radio stations on the air, and the telephone
- systems working. Now, what makes you doubt its applicability to electrical
- signal propagation in a simple conductor?
-
- Perhaps you doubt the experiential data from myriads of psychologists on the
- difficulties involved in accurately measuring human perception and preference
- through even carefully controlled experiments.
-
- Oh yes, there are differences in cables, and they are measurable according to
- some very well-known models which have been quantified and validated
- independently uncountable times. My experience on this board is that all of
- the engineers who have commented on cables have at one time or another offered
- evidence to show what the differences are and under what conditions they will
- have an effect, so your characterization above seems a bit unfair.
-
- The conclusion is that cables of similar size have measurable differences
- which are either insignificant at audio frequencies for the lengths normally
- encountered or are far below the limits of knowledge of the other components
- in the system. How do I know this other than by personal experience as a
- practicing engineer? Hewlett-Packard, Tektronics, General Radio, Marconi, and
- others have made successful businesses in instrumentation, and the NIST hasn't
- called any of them on it yet, so it's not exactly blind faith.
-
- When people insist on patronizing speaker manufacturers who won't follow
- reasonable practice standards of impedance stability and amplifier
- manufacturers who use vacuum tube circuits (or similar output driver
- topologies) that result in high impedance outputs not approximating voltage
- sources, they've predictably got far more than cable problems. In spite of
- the cost of such components, I would not call the match a "reasonably good
- system".
-
- Does anybody still listen to music?
-
- Your turn.
-
- Rich
-
-
- "Please keep in mind that the ultimate goal [of hi-fi] is the
- reproduction of art, and that the invocation of science, while a neat
- parlour trick, is often unnecessary, flawed, and unreasonable."
- -- name mercifully withheld... rsd@sei.cmu.edu
-