If you look at some graphs showing power vs. distortion you will see the sweet spot for the amp when it comes to output. SS state amps generally start at lowish distortion, drop down even lower in the sweet spot, and then rise (eventually steeply) at a given output. Here is an example - look at figure 4.
https://www.stereophile.com/content/pass-laboratories-xa25-power-amplifier-measurements
Generally people say the volume somewhere in the middle of the range is most optimal. But of course this will change depending on the preamp, amp, speakers, etc.
https://www.stereophile.com/content/pass-laboratories-xa25-power-amplifier-measurements
Generally people say the volume somewhere in the middle of the range is most optimal. But of course this will change depending on the preamp, amp, speakers, etc.