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From: greg@olivej.UUCP (Greg Paley)
Newsgroups: net.audio
Subject: CD player isolation
Message-ID: <282@olivej.UUCP>
Date: Thu, 31-Jan-85 18:26:32 EST
Article-I.D.: olivej.282
Posted: Thu Jan 31 18:26:32 1985
Date-Received: Fri, 1-Feb-85 21:51:00 EST
Organization: Olivetti ATC, Cupertino, Ca
Lines: 33


The importance of isolation for CD players has been raised
here several times and seems to nearly rival the situation
with turntables.  I don't own a CD player (yet), but have
several friends who've lent me theirs for extended periods
of time and I've found some of them very susceptible to
shock and external vibration.

One idea I would be inclined to try if I owned one is what
a friend did, with dramatic results, with his Thorens turntable.
He mounted a shelf for the turntable onto brackets that
were, in turn, directly secured into the wall studs.  
Being suspended from the vertical studs, there was a
notable improvement vs. mounting the unit on anything that
was ultimately resting on the floor.  The table now appears
virtually impervious to either footfalls or acoustic feedback,
whereas previously, with it sitting on a cabinet, even
walking past gently could send it mistracking.

This clearly causes some decorating problems, since it
puts the unit in a fixed location in the room, allowing for
no flexibility of rearranging.  However, if this is as effective
for a CD player, it could turn out to be far more economical
than spending a large amount of money just to have internal
isolation in the unit itself.  This might make feasible the
purchase of such units as the recent Sanyo model which
sounded good but was exceptionally vulnerable to mechanical shock.
In fact, footfalls in the area which left an AR turntable
completely unperturbed, were able to audibly upset the Sanyo.

	- Greg Paley