2 channel for Revel F30's

Most B&W speakers are rated at 89dB or so. I wouldn't recommend powering them with a 25 watt tube amp, though.

I don't think the issue of sensitivity is as clear cut as you make it.

One man's loud is another man's soft. It is all relative and loudspeaker sensitivity is barely 10% of the story.

Also, don't forget we are talking about logarithmic scale! Human brains tend to make everything linear but that isn't reality. "A little louder" can cost an extra 75W of power surprisingly easily. Do some dynamic range power calculations and/or live with McIntosh power meters for a while and you'll see what I mean.... I did both with Revel F30s and I can tell you, power is necessary for these speakers if you want to get the most of their ability.

Arthur

02-05-07: S7horton I don't think the issue of sensitivity is as clear cut as you make it

It could be that the Revel F30’s have a big variance in impedance across the frequency range. If that is the case, it is better not to use tube amplifiers at all, 100 wpc or otherwise. The amps will never sound their best.

Tube amps require speakers with benign impedance curves more than high sensitivity.

Regards
Paul