Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!wjh12!talcott!harvard!seismo!brl-tgr!ron From: ron@brl-tgr.ARPA Newsgroups: net.audio Subject: Re: Most Amazing Thing I've Ever Seen Message-ID: <6620@brl-tgr.ARPA> Date: Mon, 17-Dec-84 12:06:32 EST Article-I.D.: brl-tgr.6620 Posted: Mon Dec 17 12:06:32 1984 Date-Received: Thu, 20-Dec-84 03:18:17 EST References: <3309@mit-eddie.UUCP> Distribution: net.audio Organization: Ballistic Research Lab Lines: 18 > The acoustic wave guide thing works supposedly on the same > principle that makes a pipe organ work. The woofer is in a tube that is > 80" inches long. The woofer is 20" from one end of the tube and 60" > from the other and radiates in both directions. The tube is folded in > such a way that it all fits inside the getto blaster, and you'd never > know it is there unless someone told you, or you took the thing apart > and wondered what the maze of plastic is for and why it no longer sounds > good. > Sounds like a kludge that may work. Electrovoice Sentry IV's use folded horns and are the most efficent things I've ever seen. They are also the only speaker that EV makes that is worth anything. There other idea, gluing a wait to the front of a woofer to simulate the column of air that the speaker would have been pushing if they were larger. You needed this crazy equalizer to make them sound even marinally OK. -Ron