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From: jhess@orion.oac.uci.edu (James Hess)
Newsgroups: rec.audio.high-end
Subject: Re: Amps, preamps, CD players, etc.
Message-ID: <8688@uwm.edu>
Date: 4 Jan 91 14:56:55 GMT
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In article <8550@uwm.edu> ccicpg!keith@uunet.UU.NET (Keith McIntyre) writes:
>
>
>This is a marvelous and essentially free improvement for your stereo system.
>I found that if the power amp was left on and 
>allowed to warm up, the sound improved noticeably. 
>
>What are the differences in sound? Imaging is the easiest to describe. Prior
>to 45 minutes the sound stage is very small left to right, front to back and
>vertically as well. After the 45 minute warm up, the stereo will begin to
>image instruments and voices beyond the right hand side of the right speaker
>and beyond the left hand side of the left speaker. Front to back imaging or
>depth becomes a little better. 
>

Hmmmm... It's well known that phase and frequency response differences between
two channels will produce an illusion of stereo separation. (Used in devices 
from Carver's sonic holography processors to those stereo enhancers on cheap 
boom boxes.)  Is it possible this apparent improvement is nothing more than 
the results of thermally-induced drift in component values changing the 
transfer functions of the circuts?

In search of sonic utopia...

J. Hess