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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: RE: Dynamic range power posted by weltersys on January 8, 2009 at 10:45:43:
No, this is a problem - I've mentioned this before... The FTC RMS power rating is virtually irrelevant in audio reproduction. Playing music with even the least efficient speakers will push less than 25 Watts RMS. But even an efficient speaker will need 100 Watt peak capability. Yes, 1975 you would see peak capability. Now you will see the Dynamic capability spec in some amplifiers... if you add 3dB to that figure then that is the best you could effect (Dynamic capability is the RMS value of a short term tone burst at 1000Hz - where the transients likely to stress the peak output capability demand more high frequency capability.)
Tube amps often use very high rail voltages - even after transformer ratio conversion - and less regulated power supplies, so they often have a high inherent crest factor. Crest factor should be the inherent specification for an amplifier. I'd measure it by putting a PSD of pink noise equivalent to 1 Watt output mixed with a gradually increasing a single 5 kHz "cycle" until clipping occurs. I'd call the voltage ratio (the reference voltage would be different depending on the load - 2, 4 or 8 ohms) a "Reference(1W) Crest Factor" or simply "Ref. CF." maybe Stereophile can do this test. As Tom Danley said elsewhere here, you don't really hear a instantaneous peak clipping as clipping but when you compare it to a non-clipping signal the difference is noticeable and repeatable.
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- RE: Dynamic range power - gymwear5@hotmail.com 01/8/0911:34:16 01/8/09 (0)
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