| Speaker efficiency? [message #16858] |
Sat, 21 August 2004 07:12  |
wunhuanglo
Messages: 912
Registered: May 2009
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Illuminati (2nd Degree) |
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Suppose somebody said that their mid-woofer achieved "106dB sensitivity at 80Hz", which someone recently did. I guess I'd make the assumption that the reference was 1 watt input, rather than gaming the sub-8 ohm impedence vs. 2.83V thing, but you never know. I read somewhere that 109dB SPL is one equivalent to 1 (acoustic) watt. If the claim above were true, that would seem indicate a conversion efficiency of over 97%. That seems like a much higher efficiency than I would have thought was possible. Am I looking at this correctly?
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| Re: Speaker efficiency? [message #16873 is a reply to message #16872] |
Sun, 22 August 2004 15:38  |
Bill Fitzmaurice
Messages: 335
Registered: May 2009
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Grand Master |
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Keep in mind that the standard for measuring any speaker's SPL is half-space anechoic, so I wouldn't quibble about a horn being quoted at 108dB. I can't think off hand of any speaker being measured in an omnidirectional mode. When it comes to HF horns the radiating plane is often going to be a wavelength through the majority, if not all, of the passband, so the idea of them radiating onmidirectionally doesn't apply in any event.
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