Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!decvax!tektronix!tekmdp!michaelk From: michaelk@tekmdp.UUCP (Michael Kersenbrock) Newsgroups: net.audio Subject: Re: Are all DADs alike? Message-ID: <2107@tekmdp.UUCP> Date: Fri, 29-Jul-83 15:58:45 EDT Article-I.D.: tekmdp.2107 Posted: Fri Jul 29 15:58:45 1983 Date-Received: Mon, 1-Aug-83 06:13:34 EDT References: tektroni.1243 Lines: 15 How much phase shift does a "typical" speaker system introduce ( I have AR9 and B&O M100 speakers if you know those numbers) as compared to the phase shift in a CD player? Kim Rochat mentioned 180 degrees at 20 KHZ for some CD player (I have a SONY). It seems to me that if I move my head back (from the speakers) about 0.3 inches, that I have caused a 180 degree phase shift at 20Khz, but less than 10 degrees shift at 1KHz, so does a 0.3 inch headmovement have the same effect as the total error in the CD player process or am I missing something? Anyway, how much phase shift is caused by the speakers, and how much by headmovement, and how do these compare in maginitude to the shift caused by a CD at very high (audio) frequencies? Mike Kersenbrock Tektronix Microcomuter Development Products Aloha, Oregon