kicker mid bass enclosure

I have a pair of Kicker Impulse midbass drivers, probably equivalent to a pair of 6.2i 6 1/2 inch drivers (they are 6.5 inch drivers but i dont remember the model number... bought them in 2000). I'm wanting to put them in an enclosure and was wondering what volume would give it optimal SQ performance with a rich midbass/low midrange output with around 60 - 75watts going to each.

any suggestions?

what kind of box and where are they going? you arnt going to put them in the trunk to act as subwoofers are you? i saw a video where a guy put like 4 6x9's in a box to act as subwoofers...... i just laughed. they where cheap ones also like volfenhag or sumtin of that class (junk)

the speakers are going to be part of a 3piece rear fill set up that im designing for my 07 Saturn Ion3. no, they are not going to be used in lieu of subwoofers. for that, im using a pair of Boston Acoustics G5 series 10's dvc. as stated, i wanted to put in an enclosure to assist in produce a robust sounding midbass, that really brings out the best in the speakers. as far as what the enclosure is made out of, not that i think it matters, but its going to be fiberglassed as it will have to contour around trunk springs and the like. likely an mdf frame but fiberglass body. will be vinyled to matche the interior too.

hope this helps