What would cause a scratchy or crackling sound in my speakers when I use my remote to turn up the volume. It's not real loud but it does happen consistently and at all volume levels. I have a 5 month old Yamaha RX-v1400. My equipment is in another room and I'm using a "remote extender" to send the signals if it makes any difference. Thanks
CSW Newton M60's(left right, MC500 center, Hsu VTF-2 Sub, Denon DVD2200)