how come the apple pro speakers sound so weak compared to my old 5 watts per channel 2.1 sys.??? Will the sound change if i were to add an iSub?...seems like my old speakers were amplified and hooked into the sub. Does this also hold true for the iSub?I was just wondering...and if adding it will help the output quality, cuz the current Pro Speakers suck **** as stand alones.....🙁