Twl, like most of us, you are coming from a voltage source mindset. Just about all of us think in this manner. That is the way of audio. A current source is a WHOLE different ballgame.
I have heard stories of people building low watt amplifiers that were operating as current sources, and they drove the absolute devil out of their earlier Apogees (virtually almost dead shorts). Conversely, even some absolute beasts of more traditional amplifiers (the bigger Krells, MLs, etc.) literally blow up or melt with the same loudspeaker.
Perhaps Sean can educate us a bit on the differences...