Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site umcp-cs.UUCP Path: utzoo!linus!philabs!seismo!rlgvax!cvl!umcp-cs!dsn From: dsn@umcp-cs.UUCP Newsgroups: net.audio Subject: Re: Speakers Message-ID: <713@umcp-cs.UUCP> Date: Mon, 11-Jul-83 13:36:18 EDT Article-I.D.: umcp-cs.713 Posted: Mon Jul 11 13:36:18 1983 Date-Received: Tue, 12-Jul-83 06:26:51 EDT References: <789@rlgvax.UUCP>, <409@mit-eddie.UUCP> Organization: Univ. of Maryland, Computer Science Dept. Lines: 22 From: gs@mit-eddie.UUCP No, you don't understand about the A/B comparison test. I did this at home, with my system, and the volume set at the same level. The speaker switching was done with speaker selection knob. If that's the case, then your A/B comparison test was almost certainly misleading. No two types of speakers have exactly the same efficiency; the same level of input to two different types of speakers will result in differing levels of output. Small differences in output level--too small to be detected as one speaker sounding LOUDER than another--are usually perceived as differences in quality instead. The only way to do an A/B comparison correctly is with a meter to measure the volume produced as OUTPUT from the speaker. When you switch from one speaker to the other, adjust your volume control so that the output level from the second speaker is the same as from the first one. -- Dana S. Nau