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

@curiousjim   I believe so.  I also have a pair of very nice SVS unported sub woofers working in the system as well.  They have their own Class D power amps rated at (If I recall properly) 600 Watts x 2.  I have a tendency to play my music louder than normal since my hearing is less than stellar.  

@niodari 

See the post above I sent to @quincy . My amps are Class A for the first 10 watts and I rarely use all 10, but I’m sure I went wayyy above the 10 when I was playing tunes for my wife.😁 I might have hit 50 watts or I may have hit 300.  I didn’t check the dbs. Maybe I should have.

Out of curiosity, have you ever played Tricycle on your system?  If you do, keep the volume way down the first go round.

@curiousjim Take care of your ears. Above sone threshold, the louder you listen the more is the distortion, you can note this even in live performances, more in home audio. I didn't put that track on my system but I can try if you are interested in some particular performance issue. At this moment I'm listening to Mozart's symphony 41 on LP and would like to continue. This morning I listened to Ozzy Osbourne's late (2001) solo album.  It is recorded too loud,  I listened it also quite loud (my wife was not at home!) on my SS class d amplifier. The distortion during the recording session is quite notable. But it is somehow unavoidable in this kind of music. Surprisingly, some tracks on "Master of Reality" are better recorded.