My alpine does or did. I think it's more to do with your location and distance from transmitters.
When I lived in Wolverhampton I didn't notice it but since moving down to Dunstable and travelling to work in Watford it was really bad.
The phase 1 aerial helped but looked crap. So I investigated and found the 7v out put from the standard headunit.
Kwik try finding searching for stations while I friend holds the aerial I bet you'll find more stations when they hold it then normall.
When I lived in Wolverhampton I didn't notice it but since moving down to Dunstable and travelling to work in Watford it was really bad.
The phase 1 aerial helped but looked crap. So I investigated and found the 7v out put from the standard headunit.
Kwik try finding searching for stations while I friend holds the aerial I bet you'll find more stations when they hold it then normall.