Which is the best way to hookup a subwoofer. Is it best to connect the single subwoofer output from the reciever, into a "Y" connector and then into the two red and white "Line In" inputs in the back of the subwoofer? Or is it best to connect the single subwoofer output from the back of the reciever to the "LFE: input on the back of the subwoofer? I need help on which is the best way.