Speakers Poping

i just got a new head unit and installed it but everytime i change the radio station the speakers pop. now i have the factory amp that comes with the car and i also bought the wire harness that comes with a chime box so i wont loose the chimes after i take out the radion... Can any one help me out and tell me how to get rid of the poping sound in the speakers when i change the preset radio stations???????????

[Vtolds]

No need to post the same question in 2 places.

[ImSoBored]

do they only pop when its turned up loud? did they pop before your new HU?