Depends on your entire system setup and where you plugged in the amp on soundcard, do you have it set to 2 or 4 speakers, is the equilizer on, is the bass boost on in options, if any, is the EAX on and setup ? One time clicking is ok, continous clicking, you have a problem. The connection click is normal. I would try Headset setting in speakers, for AMP, see if that solves it. Some cards have power amps, double up on amps and you can get anomalies.