before i installed my focal 6w2,s in my xterra 8 mo ago , i built a small sealed test box and installed a 4 in scan-speak vero vent at the rear of the box just to see if there would be any improvements in overall mid clarity and low end resp. but it didnt take long to realize after listening it wasnt what i was looking for ,midbass was tubby-midrange distorted at med output levels,it could be due to the focals very high qts around .74 ,it sounds much better in the door,midbass still a bit tubby though