What do you think for those that own these? I am planning on 6 of these in a 7.1 setup, but for 2 channel stereo I want to know if two of these will be able to fill a 12x20 room.
With an above-average amp, you should have no problems, and if you set your Dolby Digital crossover so all speakers are SMALL (and you use a subwoofer), you can get by on an average amp. Just don't expect a great amount of deep bass from these speakers. They definitely work best with a subwoofer, in a 2.1 stereo arrangement.