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- Path: sparky!uunet!noc.near.net!hri.com!ukma!cs.widener.edu!netman!jrp
- From: jrp@netman.Widener.EDU (Joshua R. Poulson)
- Newsgroups: rec.audio.car
- Subject: Re: Why so much power?
- Message-ID: <1h80u4INNij0@cs.widener.edu>
- Date: 22 Dec 92 21:22:12 GMT
- References: <1992Dec22.194940.27109@csc.ti.com>
- Reply-To: Joshua.R.Poulson@cyber.Widener.EDU
- Organization: Widener University Dept. of Computing Services
- Lines: 48
- NNTP-Posting-Host: netman.widener.edu
-
- In article <1992Dec22.194940.27109@csc.ti.com>, ajones@dadd.ti.com (Alan Jones) writes:
- |> Anyway, why do cars require so much power to produce quality music? Most good
- |> systems seem to include hundreds of watts of amplifier power. My home system
- |> has only 45 watts, and it's so loud I never turn it up past 50%. The area
- |> inside a car is so small - I'd expect that you wouldn't need much power to fill
- |> it with quality music. What's the deal?
-
- Ah, yes. The perennial question. At any rate the answer is difficult to
- express without demonstration... but it revolves around two important
- points: realism, and dynamic range.
-
- When you go to a concert that is properly set-up, you find yourself the
- focus of thousands of watts of musical power and you can hear each note
- in the magajoules of energy directed at those delicate bones in your ear.
- The reason for so much power there is to give everyone the benefit of
- hearing the slightest noise in the band's performance... the nuances...
- the individual sounds.
-
- When you attend a concert like an unpowered orchestra there is still
- a massive amount of amplification by the very design of the hall, and
- again there are many sources of music and you shouldn't wonder that they
- all sweat. (It ain't just because of the tuxedos).
-
- At home, it takes less power to give hints to this dynamic range, but the
- truly incredible sound setups in the home are again megawatt extravaganzas.
- My personal setup features 1200 watts of power... The neighbors seldom
- complain if I invite them over for movie nights.
-
- In the car, a lot of energy is lost because of poor speaker placement, the
- materials in the car damping the sound and several other factors. The
- reason my car is running at a rated 770 watts is for the dynamics. Kick
- drums sound like kick drums. Guitars with distortion don't get extra
- distortion from nasty speakers and overdriven amplifiers, and the concerts
- in my car do a fair job of approximating the concert experience.
-
- No one's car or home system can approximate the real thing (not until the
- recording industry goes up a few notches, and the rest of the audio
- industry follows their lead) but you can get closer with a lot of power
- and signal processing.
-
- Dynamic range: the difference between the quietest and loudest discernible
- sounds on playback.
-
- Realism: Does it sound like it did when the band recorded it?
-
- --
- Joshua R. Poulson, Systems Programmer, Computing Services, Widener University
- jrp@cyber.Widener.EDU, jrp@netman.Widener.EDU, poulson@cs.Widener.EDU, et al.
-