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From: rentsch@unc.UUCP (Tim Rentsch)
Newsgroups: net.audio
Subject: Re: Unmeasurable differences?
Message-ID: <6590@unc.UUCP>
Date: Sat, 14-Jan-84 11:50:21 EST
Article-I.D.: unc.6590
Posted: Sat Jan 14 11:50:21 1984
Date-Received: Sun, 15-Jan-84 02:43:50 EST
References: <2389@rabbit.UUCP>
Organization: CS Dept., U. of N. Carolina at Chapel Hill
Lines: 14

It seems worth pointing out that the testing method may have had
more profound impacts on the results than what the experimenters
were trying to test.  In particular, if the amplifiers were
frequency matched by some kind of frequency euqalization circuit,
i (for one) would believe the effects of the F.E. circuit to
swamp the effects of distortion (of the extremely low variety) in
the amplifier.  You have to be VERY careful when doing experients
of this kind that you are measuring what you intend to measure.

(The other results, i.e., that freq. resp. difference was not percieved
as such, was very interesting.  This is, however, exactly what I would
expect if a frequency equalization method was used.)