i dont have the M version of the Aego but the previos model, sure the sub is the same so the connections should be as well, all of this is off memory, havent touched the connections since i bought the thing
The phono connections you have seen are for the speakers, they even have a phono jack at the base of the speaker as well.
You connect them to your pc via the standard mini headphone jack from the line out on your sound card into the back of the amp
oh and yes you can hook up other devices to the Aego's only one at a time though. and again you have to use a mini jack connection, not ideal for the tv