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Message: <blockquote data-quote="squeak9798" data-source="post: 920953" data-attributes="member: 555320">No, it depends on the method that was used.  That sensitivity is supposed to be measured with 1w @ 1m.  But, many 4ohm speakers are rated using 2.83V input, rather than 1w (2.83V = ~2w on a 4ohm speaker.  Using 2.83V is only acceptable for use on an 8ohm speaker).  So, in this case, the true efficiency of the 4ohm speaker would be 87db, NOT 90db.  As you can see, here the 8ohm speaker would be 3db more efficient.But if they are both have a true efficiency of 90db, then there isn't a difference between them (as far as sensitivity is concerned).</blockquote>

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