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: Litz wire might make a difference Message-ID: <2595@rabbit.UUCP> Date: Mon, 12-Mar-84 13:58:00 EST Article-I.D.: rabbit.2595 Posted: Mon Mar 12 13:58:00 1984 Date-Received: Tue, 13-Mar-84 08:38:30 EST Organization: AT&T Bell Laboratories, Murray Hill Lines: 14 I had thought that audio frequencies were way too low for the skin effect to make any measurable difference in speaker wire. I knew that skin effect was important at radio frequencies, but that at lower frequencies it would be insignifant. Perhaps not. I have just learned for the first time what the numbers actually are. Apparently, the skin depth is 0.001 inch at 1 megaherz, and goes as 1/sqrt(frequency). Thus at 20 kHz the skin depth is only 0.007 inches, which is pretty close to the diameter of a strand in ordinary stranded wire. It is therefore conceivable that insulating the individual strands would make a measurable difference in the behavior of speaker wire at 20 kHz and lower frequencies.