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The speaker efficiency rating is probably wrong, the meter is not accurate

My own EPOS ES11 speakers are "rated" at 87dB efficiency yet when tested by AUDIO magazine were found to be 85.5dB efficiency. Since I use them with a high pass filter to keep bass below 70Hz. away, even that number is no longer accurate.

Peak power requirements may be very brief -- that's why it's so easy to overlook amp clipping.

The amplifier "headroom" measurement uses a brief tone burst, either 20 milliseconds or 200 milliseconds == faster than a Rat Shack meter.
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Richard BassNut Greene
Subjective Audiophile 2007


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  • The speaker efficiency rating is probably wrong, the meter is not accurate - Richard BassNut Greene 09:00:00 05/25/07 (0)

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