could be net. its 1.25-1.75 cubic feet for a ported box for a 10" kicker comp. so says kicker, i might just go sealed. its for my girlfriend and shes not really into this stuff although she does apreeciate the good sq of the music. i might just go sealed for more accurate bass with better SQ plus it will be easier and save more room. and im just afraid im gonna spend money on mdf adn **** it up.