Are there more than one amps in an SC400 with the Nak premium system? The reason I ask is because it seems like when I play CDs it sounds like all four of my speakers are cracked. But when I listen to music on the radio at the same level or even higher, I don't hear all the cracking and popping noises.

 

One 5 channel amp in the Nakamichi system, located underneath the CD changer. For the Pioneer premium system, there are two amps.