Subs in a Contour? I don't know if that's a good idea. Why not just play the factory speakers at real high volume?
....ok seriously though, no problem with 400-500watts in the 'tour
1999 SE White
AVH-P6500DVD
Infinity Reference 6500CS
Pioneer 5x7s
Punch 360a2
Punch 500a2
Adire Tempest in a custom sealed 3.4cuft box
Modded Xbox
Still need Midnight Cloth Headrests... and if somebody has fold down rear seats....