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Need speakers that can rock with just one watt? You found da place.

RE: What qualifies as a high efficency speaker?

Well around 92dB 1w 1m is approximately 1% electro acoustic efficiency and 102 would be around 10%, 112 would be 100% (impossible). What makes this harder to gauge is that the above assumes a source with no directivity and directivity can raise the on axis sensitivity without rising the true efficiency.

If this wasn't complicated enough, then one can add horns to the mix where it IS possible to get say 40 or 50 or more% true efficiency BUT only in a relatively narrow range and there simply aren't any compression drivers which are efficient up high. If one wants to end with flat response, it is the efficiency at either end of the spectrum that governs what you have in the middle.
Hope that helps
Tom


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