My dad gave me a pare of computer speakers "Bose Companion2 Seriesll" On the back there are four plug ins that say input 2 white and 2red. and of course white is left and red is right. Then an extra plane plug that says to left speaker which I plugged the left speaker into. but the wires he gave me to hook them up to the computer itself have 1 red 1 white and 1 yellow. when I plug them in there is a very loud humming noise. Im guessing he gave me the wrong wires? should I have a set of wires that does not have a yellow plug? just a red and white?