hi, i am trying to figure out how to go about hooking up an additional set of speakers to my G4, which has my itunes library on it. i don't want to go wireless, just want to know what i need to do in order to add an additional set of speakers for my living room. not sure what i need... an amp? a mixer? i'm not the smartest with this stuff, so any help would be great. the speakers i have hooked up now sound great, i just want to attach another set in another room. is this possible without too much hassle? thanks!