upser14,
I have been testing the Alpine XM unit in my car. The thru-glass antennas (two-piece) don't work on the car very well (glass is very dark, doesn't help with signal transmission). I have settled on an Antenna Specialists Constellation Rooftop antenna (Part # XM20/CP). It is only 14 mm high and will be mounted just in front of the rear hatch on the roof. Some people claim that the antennas work ok in the car, but, in my area, they don't work extremely well inside the car.
Scott
|