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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: If your amplifier is clipping, have you left the realm of high fidelity? posted by AJinFLA on October 31, 2006 at 16:11:48:
It’s a frame of reference issue.
Any clipping is a departure from “pure†amplification or reproduction at least from an engineering view.
In the real world where one must be practical and subjective, then the issue is much less clear.If one listens to music or other program and makes the “single sided†judgment that at X level you can maybe hear something “not rightâ€, one would conclude that below X amount, clipping is inaudible.
Conversely, if you alternate between unclipped and clipped and compare the sound, one finds that clipping at a much lower level is now audible in that there is a difference heard between clipped and unclipped.
The unclipped as one might guess, sounds like its more dynamic.In a similar but less abrupt way, loudspeakers ALL compress dynamically too.
When the VC wire is “hot enoughâ€, an increase in input power actually results in a reduction of acoustic out put (Doug Button’s @ JBL’s paper on power compression)
While “normal†loudspeakers are not pushed that hard, it is a fact that the effects of VC heating begin to show up in measurements at 1 / 10 to 1 / 8 rated power.
Al of these things show up “if†you watch what speakers do at different power levels.
These “minor†things are not generally discussed because they do not help sell speakers and there is no solution other than to use a speaker at a tiny fraction of what it can do (the cost of which is unacceptable in the market place).Yet, if one has a peak reading SLM, like the B&K 2204 I have , or if one records with “modern digital†and good mics, one finds that “liveâ€, peaks are higher than you would imagine, recordings are compressed too.
For those with good headphones or time coherent speakers that can also produce “peaksâ€, I have an
un compressed recording at the company web site which is an exercise in dynamic range and extended lf response. DO NOT make an MP-3 of it unless its to compare it to the Wave file, the mp-3 process ruins it even at 320K.http://www.danleysoundlabs.com/knowledge baSE.htm
Best,
Tom Danley
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Follow Ups
- YES,,,,, But - tomservo 08:55:46 11/02/06 (1)
- Re: YES,,,,, But - AJinFLA 13:50:59 11/03/06 (0)
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