Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP 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.