Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site rabbit.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!alice!rabbit!ark From: ark@rabbit.UUCP (Andrew Koenig) Newsgroups: net.audio Subject: Re: Feedback Problem Message-ID: <3048@rabbit.UUCP> Date: Fri, 10-Aug-84 15:18:51 EDT Article-I.D.: rabbit.3048 Posted: Fri Aug 10 15:18:51 1984 Date-Received: Sat, 11-Aug-84 01:02:44 EDT References: <42400002@hpfclo.UUCP> Organization: AT&T Bell Laboratories, Murray Hill Lines: 16 Bob Schneider complains about feedback in a situation where his turntable is on a shelf mounted on a wall in the same room as the speakers. This sounds like a classic case of acoustic feedback. As a test, you might try changing something about the acoustic coupling between turntable and speakers and see if it changes the character of the feedback. For instance: put the turntable on several layers of blankets, move it elsewhere in the room, or run it with the dust cover open if it's normally closed (or closed if it's normally open). If this is the problem, there are several products designed to cope with it. Audio-Technica (I think), for example, makes a set of mushy feet to put your turntable on. Someone (I forget who) makes a heavy marble slab on soft feet. For all these doodads, the purpose is the same: to prevent the sound from the speakers from affecting the turntable.