Zd542, legally they would all be required to put out at least 100 Watts. I agree that 89 dB isn't that inefficient, but 39 Watts is really on the low side for a room of that size.
How many watts per channel are enough?
I am considering my first tube amp (Prima Luna Prologue 5 or Jolida 502 p). I lean toward the Prima Luna but it only has 34 watts per channel. Is that sufficient to drive my Jm Labs Daline 3.1 speakers (rated at 89db into 8 ohm)? My preamp is a Jolida 5 t. The room is 12 by 24 with high ceilings. I listen primarily to jazz and classical at low to moderate volume. Thank so much for any advice.