How much power is really needed to drive large speakers

[Marin]

Hello, I haven't dealt with larger speakers like Dali Epicon 6, FOCAL JMLab Electra 1038Be, or ACOUSTIC ENERGY Reference 3 until now, so my question is: how much power is needed to get maximum detail out of them at about 80 decibel levels, listening distance is 4 meters, room is acoustically treated.
Will something like MARANTZ PM-11S3 be good enough?

 

[tyhjaarpa]

What size your room is? It is more of speaker sensitivity than size itself. But how ever I would say that PM-11S3 is capable to run those speakers if your room isn't huge.

 

[Marin]

The room is 25 m2.

 

[lovinthehd]

More about the speakers' sensitivity rating and your distance from the speakers, and larger speakers usually have higher sensitivity ratings...use an spl calculator to determine amp needs but likely the Marantz is overkill if anything for 80dB levels.