alpine type r 15" box

[impalss]

hey its the first time ill be building a box. its for my girlfriends honda crv. i put a alpine mrd-1005 in it and im getting a used dual 4 ohm 15" type r. im just wondering how big i should build the box, how big should the port be and what should it be tuned to? she always listens to music with a lot of bass.