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Path: utzoo!linus!cca!decvax!harpo!floyd!vax135!cornell!uw-beaver!tektronix!tekid!gregr
From: gregr@tekid.UUCP
Newsgroups: net.audio
Subject: Re: High power amps are sometimes useful - (nf)
Message-ID: <1267@tekid.UUCP>
Date: Tue, 7-Jun-83 18:37:27 EDT
Article-I.D.: tekid.1267
Posted: Tue Jun  7 18:37:27 1983
Date-Received: Fri, 10-Jun-83 13:42:56 EDT
References: hp-pcd.1089
Lines: 9


	If you were only getting 70dB SPL from 5 watts this would
actually be very inefficient.  I suspect that 70 dB only requires one or
two watts.  This depends on the room size, furnishings, speaker
efficiences,etc.  For the sake of arguement lets assume 2 watts gives
you 70 dB.  Since the SPL changes by 3 dB each time you double the power
it would take 256 watts to produce 91 dB. Assuming I can still multiply
without a calculator.  An SPL of 91 dB is very reasonable for home
listening except of course for rock music.