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- Newsgroups: rec.audio
- Path: sparky!uunet!spool.mu.edu!uwm.edu!linac!att!att!fang!tarpit!bilver!bill
- From: bill@bilver.uucp (Bill Vermillion)
- Subject: Re: Define "Headroom"
- Organization: W. J. Vermillion - Winter Park, FL
- Date: Fri, 1 Jan 1993 14:48:34 GMT
- Message-ID: <1993Jan1.144834.24253@bilver.uucp>
- References: <1992Dec29.134904.350@ncrcae.ColumbiaSC.NCR.COM> <5775@gold.gvg.tek.com>
- Lines: 34
-
- In article <5775@gold.gvg.tek.com> chrisc@gold.gvg.tek.com (Chris Christensen) writes:
- >In article <1992Dec29.134904.350@ncrcae.ColumbiaSC.NCR.COM>
- >chris@lightnin.Columbia.NCR.COM writes:
- >
- >> Can someone enlighten me as to what is meant by "Headroom"? Technical
- >>descriptions as well as figurative descriptions would be helpful.
-
- >Keep in mind that with crest factors of 12-20 dB audio can eat up
- >power and you won't know it until you are out of power!
-
- >There has been a lot of discussion on "do I really need a 200 watt amp"
- >I have seen responses like " a (""better sounding") 100 watt amp can
- >sound better than a 200 watt amp.
-
- >All of this is true but for different reasons. My basic observation
- >is that lotsa a power is good. Caculate it for yourself! How much
- >power does it take to reproduce the 12-20 dB crest factor of an audio
- >signal using a speaker who's midband output is 90 dB, 1 watt, 1 meter?
- >What is the power rating requirement for the speaker that is to
- >produce this sound? For this problem only, ignore the thermal
- >compression of the speaker!
-
- When you do the math properly, it sometimes comes out to be
- cheaper to buy more efficient speakers than buy the amount of
- power you need.
-
- >Gee I sure got off the topic!
-
- No more than I normally do :-)
-
-
- --
- Bill Vermillion - bill@bilver.oau.org bill@bilver.uucp
- - ..!{peora|tous|tarpit}!bilver!bill
-