Had a pair 4367. Woofer sensitivity is 94db with the mid/tweeter resisted to match. A seventy-WPC VAC amp and a 150-watt Hegel amp could not properly control the woofers. I had a sense of it at the time, but it was obvious after replacing them with a 300 watt ML amp. The issue wasn't room size or volume level but of bass dynamics and articulation. I now have 85db speakers which are much less sensitive between the Hegel and ML amps. I use this is an example of how I have never related volume, room size and sensitivity to amplifier power requirements. Before that may come in to play, I already hear bass problems. That's my experience, though. curiousjim already has a good reference point.
How much power needed to drive 91db speakers?
Sonus Farber lists the sensitivity of my speakers at 91 db SPL@ 1 meter @4 ohms. They also say I should use 50-450 watts of power. My PS Audio amps pump out 500 watts @4ohms, so the max isn’t a problem, but if I switched to something 15-50 class A watts, would that be more than enough power?
Thanks in advance.