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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