I have a stereo system and have recently encountered a problem after I had replaced a receiver. my now "new" receiver is a Pioneer SX-3600 and my speakers are a a pair of Klipsch KB-15 bookshelf speakers. Everything sounds fine but when i turn the knob to adjust the volume my speakers freak out and make a loud scratching or popping sound. If I turn the volume up or down slow enough it doesn't happen, but it is REALLY slow. After the volume has been changed the speakers sound fine. Anyone know what the issue is? One other thing is that I changed the wires on one of the speakers and it seemed to help a little, so could it be the wire or how well the wires are connected?