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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.

curiousjim

Showing 1 response by overthemoon

overthemoon
476 posts
 

As others have said not all watts are equal- I was dumbfounded by an ARC VT-80 that was rated at 70 watts. It was more dynamic, finessed and detailed than several amps rated at 400 watts or more. 
 

Ideally try and get a demo with your equipment - ideally at your house. 

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