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In Reply to: RE: OLD Tweak posted by unclestu on October 08, 2014 at 20:55:42
Not burdened by the assumptions of much technical knowledge, earlier today I inserted cork a sixteenth-of-an-inch thick around the circular flange between the mid-range/ woofer speaker baskets and the cabinet. That slight insulation of each from the vibration of the other (and perhaps of the tweeter and cross-over back panel from both as well) through the cabinet led to an unexpected improvement in the dimensionality of the sound. Interestingly similar insulation of the tweeter from the cabinet slightly degraded the sound quality.
The thin cork is presumably so well crushed by the screw-tightening pressure that no air can escape...
Follow Ups:
Richard V cautioned me not to touch those drivers, unless I wanted to remove them. No need to tighten them
To keep the cork from drying and cracking, a NON PETROLIUM lube, like a silicon stopcock grease very, very lightly applied should help.
You probably don't have ANYTHING in your house that'll touch this stuff. It is quite inert, under most conditions.
Too much is never enough
PictureGuy,
Many thanks for the helpful suggestion and link!
DG
Enjoy,
But keep in mind the way I was taught to use this stuff:
'Put none on and take it all off' was the mantra.
IOW, use VERY sparingly. Less, even. NO blobs or globs.
Too much is never enough
Thank you for the technical directions.
Must have removed each speaker box from its cabinet for various testing purposes about 25 times this year, carefully laying out the ferrous screws on the floor in the exact formation of their installation to avoid endless trouble on re-installation. (A process made redundant by their brass replacements which are tightly held but not hole-dependent.)
The difficulty for an habitual tweaker is knowing when to sparingly apply 'Dow Corning® High Vacuum Grease' to the flange between each speaker basket and cabinet and secure the permanent air-pressure seal. Perhaps after soldering six-foot long, high-quality hookup-wire replacements directly from the speaker box connectors to the cross-overs in an external enclosure mounted on a maple or bamboo block floating free of the cabinet vibrations? Surely that will finally be it.
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