Hi, I have a Denon AVC A1SE amplifier and I've just bought a new Velodyne SPL-800 Subwoofer, which has two Line level Inputs - left and right. My question is this: How do I connect this to the A1SE? As far as I can make it out, the Denon amp only has provision for a single line level phono input marked 'SW' on the pre-out back pannel. So, erm, where does the other phono plug go? Any help would be very appreciated, Cheers Steve.