Hola. I am going to chime here again. On the first thing, Robert ment the Ethos model, not Theos. The Theos does not have a passive woofer. But I can tell you more about the new models starting with the new Electromotion, these babies are so good that you will be re-descovering all your recordings...and if you start going up, them you will get more good specs and sound improvement. From the Vantage model, (a classic) to the Summit X you will find self powered woofers and they do exhibit a much more detail at bass. You can "tune" your room becasue you have a knob control +- 10dB @ 35Hz on each speaker. (the Summits X has two controls, one at 25Hz and another at 50Hz for room bass control). This feature is great for bass performance. I am not saying that the models that do not have self powered woofers the bass is poor, no sir. You will be amazed too with the quality of the bass too that they do have. As I said before, 2 inches make a big difference and this is my statement. Your Sunfire amplifier will drive any ML product without any effort. The new ML product generation has many new good things and one of these is their sensitivity. You do not need too many watts to make them to sing. The older models, yes you did and do. Another vantage with this feature is that you can search for a lot of different great sounding amplifiers on the marketplace today and get the one that you liked most, even that the wattage of the amplfier might be as low as 20 watts!!! for a pleasent sound pressure level. If you want to rock then you need power of course. ML sound is ear fatigue less. You do not need to play them loud to get a concert hall in front of your ears. With moderate level you get a truly 3D stage with the right size of the instrument(s) and also the soul of the musician(s) easily can be listened. These nuances can be listened better as you start to go up in the ladder products. With 2 inches you get everything of these ML magic but effortless. The cimbals sing along at the air in all the room, the piano notes are played with more harmonich texture, the wind instruments are more real life like, the drums are clearly projected in your room, the voice(s) even female or male, are astonishing! Everything is a matter of liking. As I said before, any ML product is magical...no matter which model you chosse, you will be in heaven as we are too. Happy listening,
Roberto.