Summary: These little speakers are quite amazing. I'm powering them with a 10 watt per channel integrated vacuum tube amp. Obviously, due to their size, they should be used along with a subwoofer. They weren't designed to blow out windows..... I have the Sony SA-WX700 dual 10 inch sub that they match up well with. The midrange clarity is outstanding for such a small speaker. The highs, unlike what others have stated, are very smooth and revealing, not harsh and grainy.
Summary: These speakers sound very good for the price. I have heard lots of $200 speakers that don't sound much better. The only difference in the speakers is the bass response. The sony speakers have almost no low response. You hardly get any bass. But for me that is not a problume for me though. I have two velodyne subs which pick up the low end frequences very well. One is a cht-10 and one is a spl-1000 which together have 1875 watts of total power.