McIntosh MC2505 enough for Martin Logan Ethos?


I just had Audio Classics restore a McIntosh C28 and MC2505... looking at buying a pair of Martin Logan Ethos.   

I see they have 92dB sensitivity and can be powered with as little as 25W... seems i should be just fine with the 50W / channel output by the 2505.

That said, I’m curious what people think about this.  Will 50w be enough to get these speaker speakers to sing?
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