i think @liquidsound ’s post highlights a very important point
and that is that amps of certain power levels do better or worse within some range in their power band -- for instance, using high efficiency speakers with paper cone drivers etc, very sensitive to that first watt, fractions of the first watt they ever get from the amp (btw - that’s the reasoning behind the choice of name, for those that didn’t realize...)
versus something like a modern x250.8 - designed to deliver 250w into 8, 500w into 4... amps like that operate in their sonic sweet spot when they are doing some real work, and they are at their best, they show the strengths intended by the designer when they are delivering some serious current, applying their high damping factor on woofers that need it, and so on.... you get my drift...
so given the wide range of amps offered by pass, from the (relative) fleawatt fw’s to the mega x series amps, one still needs to think carefully about speaker/room matching -- that is the key to sonic happiness
all the above said, it is also important to note that the smaller xa series amps, in my opinion, give somewhat the best of both worlds.... they are rated very conservatively at 25-30 wpc but can actually deliver well over 100 wpc on transients....