Welcome, stranger. As the previous replies indicate, it isn't possible to give a definite answer to your question. In the vast majority of cases a 75 watt amplifier is plenty. Those speakers will use about one watt at a comfortably loud average listening level. Split-second peaks will take much more, but wouldn't likely reach the 100 watt level unless you play material with a very wide dynamic range at a very loud average level.

-----------------------------------

Enjoy the music, not the equipment.