Hello all, I received as a gift a pair of KLH floor-standing speakers, model 9250B, as well as a KLH receiver, model R5100. The system works great when listening to the radio or when watching tv/dvd, but I can hear some popping noises when I play certain songs (via my computer). I've ruled out bad mp3 quality as the cause, so I'm stumped. The popping only occurs with some songs, mainly rock and metal, whereas rap songs sound really smooth. My computer volume setting is set at half-way. What is causing the popping, and how can I stop it/fix it. Thanks in advance!