well, the speakers determing the load the amp is seeing. Your car speakers are probably 4 ohm, but most home stereos can only handle a minimum of 8 ohm speakers. Check the specs of the home receiver you are using to see what the minimum restance is that it can handle. If it's a minimum of 8 ohm (which most are) then DON'T connect those speakers. It may work for a while, but could fry your receiver.