How to handle Clicks and pops

I recently upgraded my Meridian 508.20 to 24 bit (Bow Wazoo integrated amplifier and Sonus Faber Grand Piano Speakers). Sometimes when listening to music, I get clicks or pops in the music (both left and right speakers). It does not happen all the time but I do not like it. What does this mean and what can I do to fix it? Could the problem be with the Meridian 24 upgrade? Could the problem be with the amplifier, speakers or CD's? Thanks