I'm not sure what your results mean, but sitting 12ft from my speakers, my Denon 3300 can run in the low 100db range all day. Peaks can hit 107 or so, but it will run smooth vocals at 102 for hours. I don't know if that is 9 watts, or 99, but it is all you could need, aside from the benefits of additional headroom.

Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire