I just got thru reading about two guys putting their XM antennas under their center channel speaker cover and getting excellent reception.How is this possible? I tried putting mine on the dash and I received maybe a forth of my stations at best.The vehicle the guys own is a Tundra.

GPS antennas might work there, I also don't see how an XM antenna could

Set the antenna upon a small metal plate, and it works fine. The Pioneer AVIC units come with an adhesive-backed square that works excellent - even with both nav and sat antennas side-by-side on it. I have actually used a small piece of Dynamat Extreme (the type that has the foil layer), with excellent results.