This is my first sub And I just got a D15 SE subwoofer a few minutes ago. It came with only a power cord and no instructions on how to set it up. I'm assuming I need to connect my sub cable to the line in. Does it make a difference when connecting to either the L/R? I just thought their would also be a single line in to connect to. Sorry, this is my first sub and just want to be sure I set it up right. I will be connecting it to a Denon 1909. Thanks.......