I just bought a KLH S200ETH subwoofer in a as is sale, the LED on the rear lights up, but I want to make sure that I'm connecting it properly before I go any further. I have a Samsung HT-SK6 receiver with a RCA output for a powered subwoofer. The subwoofer has right and left low level RCA inputs and outputs. It also has high level right and left speaker inputs and outputs. Do I run a RCA cord from the output from the receiver to the subwoofer's low level RCA connectors, and does it matter whether I use the left or right?