I'm new to the turntable scene and was hoping for some help with a hum. The turntable I am using is a Dual CS 607. When I first played it there was a hum coming from one of the speakers and now it has spread to both of the speakers. When I touch the AV cables coming from the turntable but before my pre-amp the hum will get much louder. How do I replace the cables? And would there be anywhere else this hum would be coming from? Any help or tip are greatly appreciated.