you're gonna want to convert that to cu. ft. for ease...

You can play around with different numbers to see what cubic footage you come up with... (L x W x H /1728")


Smaller enclosures usually require MORE power... so you may want to go with a box that is closer to the larger recomended box... although, you're amp power is close to the subs recomended power, so it really dosent matter too much.