Regardless of the speaker's sensitivity I have found not driving your amp too hard and having more power and headroom available is a very good thing. In my current rig a highly touted 70 watt tube amp was displaced by a Hybrid amp with 4 times the power. The more powerful amp was not taxed as much, and I think since it was not pushed, just sang with more ease and pleasure.
Extra watts and headroom can be a very good thing especially with large orchestral music and the like. Same is true for solo piano turned up to louder volumes.
Extra watts and headroom can be a very good thing especially with large orchestral music and the like. Same is true for solo piano turned up to louder volumes.