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Article #1290Re: stereo audio switch 1 in 8 out
From: Scott Dorsey
Date: Fri, 19 Dec 2008 00:58
Date: Fri, 19 Dec 2008 00:58
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Claude <Claude@invalid.com> wrote: >Doesn't powering multiple speakers simultaneously from one amp increase the >load significantly (more than arithmetically)? It increases it arithmetically. This is why the speaker switchboxes have some big series resistors that they swap in and out to make sure the amp sees an appropriate load. When you parallel impedances, you add reciprocals. So two eight ohm speakers in parallel gives you 1/8+1/8=1/4 for a total of four ohms. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis."
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X-Google-Thread: 10cf58,d2a5618cca27a14c X-Google-Thread: f74cc,d2a5618cca27a14c X-Google-Thread: 1096eb,d2a5618cca27a14c X-Google-Thread: 101631,d2a5618cca27a14c X-Google-Thread: f6728,d2a5618cca27a14c X-Google-Attributes: gid10cf58,gidf74cc,gid1096eb,gid101631,gidf6728,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nx01.iad.newshosting.com!newshosting.com!novia!news-out.readnews.com!transit3.readnews.com!panix!panix2.panix.com!not-for-mail From: kludge@panix.com (Scott Dorsey) Newsgroups: rec.audio.pro,alt.home-theater.misc,aus.audio-visual.home-cinema,uk.media.home-cinema,uk.rec.audio Subject: Re: stereo audio switch 1 in 8 out Date: 18 Dec 2008 19:58:53 -0500 Organization: Former users of Netcom shell (1989-2000) Lines: 14 Message-ID: <gierkd$4t8$1@panix2.panix.com> References: <8eb95322-6525-4c15-bcd1-ebe385a0b309@z28g2000prd.googlegroups.com> <8a5e4dba-7771-4c7d-96ee-c172c6895034@a37g2000pre.googlegroups.com> <0721ee2f-2c73-4b18-8aa2-6886258c2af8@z27g2000prd.googlegroups.com> <4vz2l.2890$cu.2461@news-server.bigpond.net.au> NNTP-Posting-Host: panix2.panix.com X-Trace: reader1.panix.com 1229648329 15209 166.84.1.2 (19 Dec 2008 00:58:49 GMT) X-Complaints-To: abuse@panix.com NNTP-Posting-Date: Fri, 19 Dec 2008 00:58:49 +0000 (UTC)