Capslock

Hello, I've come into possession of a pair of the older ksp-300 two channel powered tower speakers. Unfortunately, I have no documentation. I'm using them with a Denon AVR 3600 A/V reciever, and can't figure out the proper wiring. When powered, they emit a quiet buzz that is obviously wrong. I'm an audio novice, so I'm not at all sure about what I'm doing. Does anyone have a quick explanation for me? I'm trying to run a DVD player, TV with Sattelite, and the audio receiver. Thanks in advance for any help! Capslock