I run a McCormack DNA500 into my Apogee Calipers. That's 500W into 8 ohms and 900W into 4 ohms, and my Calipers are basically 3 ohm speakers. No problems with the extra power - Apogees need that low impedance stability.
More importantly, are you bi-wiring them? Apogees "require" bi-wiring to sound their best. No logical explanation why, but it is very noticeable when you try this.
More importantly, are you bi-wiring them? Apogees "require" bi-wiring to sound their best. No logical explanation why, but it is very noticeable when you try this.