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Old 07-26-2014, 09:54 AM
pbellsound pbellsound is offline
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Join Date: Dec 1969
Posts: 652
I've found that the ashtray method provides 100% feedback isolation. I had tested it years ago with a turntable sitting directly on a subwoofer cabinet.

The base suspension method uses a board the size of a turntable that's suspended with bands around it's circumference. This board itself can pickup bass and vibrate. It's also susceptible to causing feedback in the 300~400 Hz range.
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