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Driver efficiency vs. overall speaker efficiency

If a speaker uses a driver that has an efficiency of, let's say 87.5db/2.83V/m, then theoretically the speaker can never have an efficiency of greater than 97.5db?
andy2
gregm
3,415 posts
 
I haven't grasped your reasoning behind the extra 10db. Anyways, speakers sporting at least one driver with a 87,5db rating would probably be < 87,5 overall.
Unless you're thinking of s/thing else? Cheers
twl
3,251 posts
 
In many cases, when you load a speaker into a proper cabinet, it can increase the efficiency level by about 1-2db.

To get more efficiency than that, you would need to go to a horn loading system which can increase the efficiency of the system.
eldartford
4,262 posts
 
You can't measure the efficiency of a bare driver. It needs to be in some sort of test enclosure. The test enclosure is not the same as the final system enclosure, and may yield a lower efficiency measurement. This is not a problem if your objective is just to compare different drivers (all tested in the same box).
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