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<blockquote data-quote="Art Welter" data-source="post: 122429" data-attributes="member: 52">Re: matching amp with speakersI&#039;m not Bennett, but I use his (and other brands) of speakers rated using the AES rating :^)The AES pink noise signal has six dB crest factor, double the crest factor of a sine wave, which has 3 dB crest factor. If the speaker absorbs the RMS average of half the AES rating, it is seeing the equivalent power of a sine wave rating.&quot;Normal&quot; pink noise has a 12 dB crest factor, a 1000 watt amp just seeing clip using pink noise is only putting out about 125 watts average, a signal with 3 dB crest factor would deliver 1000 watts average.Since digital compression (hey, it&#039;s on every channel) is capable of squashing the dynamic range of music down to ever decreasing crest factors, it is fortunate that driver manufacturers have found adhesives capable of the high heat generated in the voice coils, and cooling mechanisms capable of removing much of the heat from the voice coil. It is interesting that many amplifiers are now unable to deliver full power (rated using sine waves) for more than a fraction of a second without going in to current limiting or popping a breaker, while LF program in some music now actually has less than 3 dB crest factor, and HF program as squashed as the AES signal.</blockquote>

[QUOTE="Art Welter, post: 122429, member: 52"] Re: matching amp with speakers I'm not Bennett, but I use his (and other brands) of speakers rated using the AES rating :^) The AES pink noise signal has six dB crest factor, double the crest factor of a sine wave, which has 3 dB crest factor. If the speaker absorbs the RMS average of half the AES rating, it is seeing the equivalent power of a sine wave rating. "Normal" pink noise has a 12 dB crest factor, a 1000 watt amp just seeing clip using pink noise is only putting out about 125 watts average, a signal with 3 dB crest factor would deliver 1000 watts average. Since digital compression (hey, it's on every channel) is capable of squashing the dynamic range of music down to ever decreasing crest factors, it is fortunate that driver manufacturers have found adhesives capable of the high heat generated in the voice coils, and cooling mechanisms capable of removing much of the heat from the voice coil. It is interesting that many amplifiers are now unable to deliver full power (rated using sine waves) for more than a fraction of a second without going in to current limiting or popping a breaker, while LF program in some music now actually has less than 3 dB crest factor, and HF program as squashed as the AES signal. [/QUOTE]

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