i have an old sony reciver hooked up to my PC
. i only have 2 speakers on it as of now, but i swear these things are least 50 watts RMS, probably 100RMS. i have to volume at 3 and its VERY loud and shaking things off the desk.
if im listening to the radio with my computer off on it though, and i turn it on, i noticed that the load from my computer (watts) is so high it gets less loud because there on the same socket