You are right. It is useful when figuring out just how much amplifier you need (or think you need :))

Here is a calculator from Crown - have fun!

https://www.crownaudio.com/en-US/too...power_required

Basically add the desired dynamic range you desire to the noise floor for max SPL and fill in the rest)

Thanks for the link.
That appears to work 'reasonably well'. I plugged in 92db, 3meter distance and 3db of headroom and got 45wpc for the 88db Duetto. My INT-25, when measured by JA during the Stereophile review, put out 50wpc @ 8ohm before moving into distortion (1% THD). I'm guessing that it was pretty much pumping out about all its has to give at the 92db SPL. I normally listen with volume at 25-35 (out of a total of 63) and am at 75db SPL, give or take, depending on the music.

Terrific! Thank You!!! :yes: