2013 Acura TL Owner's Manual - Page 255

Playing the XM Radio (Models without navigation system) When DPLII is turned on (see page 244 ), sound coming from the rear speakers may be distorted due to the compression of the music being broadcast. Turn DPLII off if this happens. Signal may be blocked by mountains or large obstacles to the south. Signal weaker in these areas. Features SATELLITE GROUND REPEATER There may be other geographic situations that could affect XM Radio reception. This device complies with the appropriate requirements or the required standards. See page 628 for more information. 2013 TL 251