Help, is 15 watts p/c enough for a small room

Depends on what you mean. It will be great for background or with horns.

If you want to dance to it, probably not.

Yes, but 12 X 12 is a BAD sounding room to begin with! A pair of Heresy's will play loud enough to cause permanent deafness with 15 watts - but do you really want to lose your hearing?

Nice sounding unit, for what it is. Is this den system going to be your main listening room ? As stated above : Speaker sensitivity, impedance, listening levels, and the kind of music listened to, such as full, all out orchestral, disco, reggae, and some others, will determine the power required for a particular listening situation. The 1st watt is the most important, as far as cleanliness. And if you have a speaker that does not reproduce the last octave, your receiver will work a little less hard, as bass uses up a bit more power. Enjoy ! MrD.