Few passive control monitor (today ...)
even a small electronic deriere (hifi or studio) is the RETU of 90db + than enough.
I use is this configuration to work both the sounds and to listen to my records this with a simple Denon amp mid-game.

SOUNDS

Neutalite perfect (ala limit too)
some records are unlistenable ...
stereo image is perfect as a 1 m to 5.
only the lack of serious (- 60 Hz) epu cause detriment to certain uses (sound recording infra-bass).
dynamics even at low levels is respect .....
and is not that what we demand a monitor?!

OVERALL OPINION

This is more than 10 years I have used and quellles fiini definitely replaced by other speakers.
pity that Yamaha have decided to stop production, though connoisseurs no mistake see a listing of Love enjoyed NS10M.