Now we can all agree that increasing the trim levels doesn't mean increasing the power in itself.
Here's the question.
What if he increased the trim levels and then his master volume is now at 20, instead of 80 (out of 98 max)?
Just because it's loud, doesn't mean his Denon is unable to produce sufficient power, right?
IOW, he could add a 300 WPC amp and his master volume could still be at 80 unless he increases his trim levels or unless the amp has a higher GAIN level than the Denon.
I've played the Phil3 in full-range (set to Large) with my Denon 3000 series in a 20' x 18' x 10' room sitting 15 ft away for a while. And at loud volume. I mean LOUD. And the Phil3 has a sensitivity of 85dB.