Path: utzoo!news-server.csri.toronto.edu!rutgers!uwm.edu!csd4.csd.uwm.edu!info-high-audio-request
From: ccicpg!keith@uunet.UU.NET (Keith McIntyre)
Newsgroups: rec.audio.high-end
Subject: The vacuum cleaner tweak
Message-ID: <9942@uwm.edu>
Date: 5 Mar 91 13:58:44 GMT
Sender: news@uwm.edu
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Approved: tjk@csd4.csd.uwm.edu
Originator: tjk@csd4.csd.uwm.edu



In June of 1990 I bought a pair of Martin Logan Sequel IIs. The manual and
the manufacturer's technical support people recommend cleaning the 
electrostatic membranes with a brush attachment on a home vacuum cleaner.
Every 3 to 4 months is supposedly a good idea. The last time I had done 
this was September of 1990. This last weekend I got up the nerve to do it
again - those membranes look SO fragile. The result: the soundstage widened
by about 4 feet total on most recordings, the midrange was more transparent
and detailed. Some instruments imaged in places I hadn't believed possible
before. I'm still hesitant to do this anymore than absolutely necessary and
I open the vent on the side of the vacuum hose to reduce the suction. BUT,
the improvement in sound was significant. Just a helpful hint from Heloise.

-Keith McIntyre