radio depending on the station when the volume is at really low level if you listen for a slight his you can hear it.I've still got my original ariel in my garage somewhere like every body else I have a stubby fitted don't think that helps.90% of the time I use USB my Kenwood has the cable permanently connected at the back of the head unit going into the cubby box it sounds spot on to my ears .can't remember the last time I had a CD on .