I was recently connecting up my new receiver (Denon AVR2802) and noticed that i was getting a popping noise from the rear speakers if the positive and negative wires touched each other, this is without them actually being connected to the amp! Is it possible that this could be discharging any static build up in the cable (the cable is laid under the carpet, it's a flat cable but it was an in expensive one). The rear speakers have made the popping sound once when connected to the amp on powering up. I am a little reluctant to use the amp too much if there is risk of damaging it or my speakers which are Mirage. Any ideas ?