My bad; these speakers are rated for maximum 300w at 4 ohms.
IMO, power handling ratings for speakers are among the most meaningless spec there is. Impedance and Sensitivity are the specs that matter most.
At 93db sensitivity, a good 100 wpc amp into 4ohms will drive them to ear splitting levels in a medium sized room. You do not need an amp that will produce 300wpc into 4 with these speakers.