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- Path: sparky!uunet!usc!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!ames!olivea!gossip.pyramid.com!pyramid!lstowell
- From: lstowell@pyrnova.mis.pyramid.com (Lon Stowell)
- Newsgroups: rec.audio
- Subject: Re: Do I really need 200W?
- Message-ID: <184727@pyramid.pyramid.com>
- Date: 29 Dec 92 19:46:26 GMT
- Sender: daemon@pyramid.pyramid.com
- Reply-To: lstowell@pyrnova.pyramid.com.pyramid.com (Lon Stowell)
- Organization: Pyramid Technology Corporation
- Lines: 66
-
- In article <1992Dec29.150249.17509@galileo.cc.rochester.edu> eric@prodigal.psych.rochester.edu (Eric Hansen) writes:
- >
- >I recall a series of messages about a year ago where this guy was trying
- >to convince everyone that 2-5 watts was enough more most people. This is
- >probably true in some respects, but to save time&bandwidth, I'll summarize
- >what I can remember from this posting stream...
- >
- "This guy" could have been Paul Klipsch. That was his motto:
- "What this world needs is a GOOD 5 watt amplifier".
-
- Of course his statement is perfectly true if you are using a
- pair of nice efficient Klipschhorns which can get uncomfortably
- loud with a Dyna Stereo 70.
-
- However, if you are dealing with AR-3's, the Stereo 70 was just
- about the MINIMUM amp for decent sound.
-
- It is a fallacy to speak about "proper" amplifier power unless
- you know the efficiency of the speakers involved....and their
- impedance characteristics.
-
- 200+ watts into a set of Dahlquist DQ-10 or DQ-20's provides a
- fairly nice dynamic range with only moderate clipping on
- transient peaks. [They are power-hogs]. Into a set of Cerwin
- Vega or Klipschhorns, the same 200 watt amp can damage your ear
- drums.
-
- And if your speakers are Apogee, that 200 watt amp had better be
- able to drive a 1 ohm load with excellent stability or it will
- self-destruct.
-
- >
- >Now the headroom plug... true: dynamics require "headroom" which means
- >that the cannon blast in the 1812 overature will almost always make your
- >amp clip if its at a "kind of loud" level. This is one of the all-time
-
- The nice thing about CD is that audio is coded as dB below
- maximum. For any given player (sadly players vary somewhat in
- voltage for max record level) the maximum POSSIBLE output is
- always the same.
-
- If you have a test CD and a distortion meter (or even o'scope
- and good eyes), you can determine the clipping level for max
- output at all frequencies for your specific player/amp
- combination. Then all you need to do is mark your level
- control and never exceed that mark...bingo NO clipping!
-
- >
- >For a two speaker system owned by conservative folk, "I think" <100 wpc
- >is perfectly appropriate.
- >
- Are these Klipschhorns or Dahlquist DQ-10's? (or any other
- particularly efficient or power hungry models...)
-
- >Compare a Krell 100wpc amp with a mid-fi 200wpc amp... the Krell won't
- >clip with the cannon blast.
- >
- Depends on the speaker.....unless the speaker has a poor
- impedance curve, neither will the mid-fi 200 amp.
-
- >Please note that the preceeding has little or nothing to do with sound
- >"quality"...
- >
- You can say that again....!!! Neither speaker efficiency nor
- amp power (within power bandwidth) has any DIRECT relationship
- with sound quality.
-