I always had over powered amps with lots of headroom. It’s always been beneficial I find. I am now at an extreme point where I already had a Mcintosh 300 watt per channel and I bought Avantgarde speakers at 107 db efficiency.
That means that I hardly use two watts. I am not bothered by the amp not working hard, but rather the question always goes through my mind that the preamp volume is always in the lower area. I keep hearing that a preamp works best between 75% and 100% (unity gain).
So to your question, I would say, an over powered amp yes, but are we getting the best out of our preamps that are always in very low volume setting?
I do understand that there are many ways of attenuating signal but speaking in general here, I believe most preamps work best between 75% and unity gain