I notice you say at least 40 degrees - do you know how much higher it will go? Some
compononents like electrolytic capacitors tend to age faster at higher temperatures. You
should also check that any foam or rubber components on the monitors and turntables
haven't started to disintegrate after storing for a while.
Cheers
James.
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JRP Music - Audio Mastering and Restoration.
http://www.jrpmusic.net