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Low Earth Orbit
DIY Audio
60 Degree DIY Mid Hi - AKA PM60
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<blockquote data-quote="Art Welter" data-source="post: 148407" data-attributes="member: 52"><p>Re: 60 Degree DIY Mid Hi</p><p></p><p></p><p>What crest factor has to do with it is a square wave with the same RMS value has twice the average power of a sine wave, which has twice the average power of the AES 6 dB crest factor pink noise, which has twice the average power of 12 dB "normal" pink noise, which is roughly the equivalent of compressed pop music.</p><p></p><p>As an example, in a listening test recently burned up a speaker rated at 40 watts AES. It sustained musical peaks of around 800 watts (80 volts peak RMS) producing over 126 dBA, but would have burned up in the same time period with a sine wave of 40 watts (17.9 volts RMS) at only 105 dB.</p><p></p><p>Bottom line for speaker protection is to use 1/2 AES "wattage" for long term limiting (slow attack and release), and (around) twice AES for peak limiting.</p><p></p><p>Art</p></blockquote><p></p>
[QUOTE="Art Welter, post: 148407, member: 52"] Re: 60 Degree DIY Mid Hi What crest factor has to do with it is a square wave with the same RMS value has twice the average power of a sine wave, which has twice the average power of the AES 6 dB crest factor pink noise, which has twice the average power of 12 dB "normal" pink noise, which is roughly the equivalent of compressed pop music. As an example, in a listening test recently burned up a speaker rated at 40 watts AES. It sustained musical peaks of around 800 watts (80 volts peak RMS) producing over 126 dBA, but would have burned up in the same time period with a sine wave of 40 watts (17.9 volts RMS) at only 105 dB. Bottom line for speaker protection is to use 1/2 AES "wattage" for long term limiting (slow attack and release), and (around) twice AES for peak limiting. Art [/QUOTE]
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60 Degree DIY Mid Hi - AKA PM60
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