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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Clipping posted by kal1971@juno.com on May 9, 2011 at 14:54:03:
Some amps behave poorly when recovering from clipping their output supplies. Unlike the NAD "soft clipping" and others that are peak limiter circuits on the input, when the output device is saturated it may allow large amounts of current to drain through the load. The standard image of clipping is a squared top to a sine wave producing high order harmonics of the fundamental frequency. With music signals the signal that causes clipping is usually a transient, not oscillating,and an amplifier that has a "sticky" + or - output device, a large amount of DC voltage can momentarily discharged though your loudspeaker, with the crossover capacitors threatened for overvoltage. then the drivers. High feedback amplifiers that are not desiigned for this are more like to be "sticky". Search "sticky amplifier clipping" for resources. Audio Magazine use to test for this in their dynamic headroom test, and ten years or so ago stereophile did an article on some of the issues that cause amplifiers to clip prematurely and badly with reactive loads. Too much power amplifier rarely damages loudspeakers with music signals at the peek voltage to average load is almost always above 10dB (20 to 1 Voltage ratio)
"The hardest thing of all is to find a black cat in a dark room, especially if there is no cat" - Confucius
Edits: 05/09/11
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Follow Ups
- RE: Clipping: depends - BigguyinATL 18:59:53 05/09/11 (0)
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