I Have 2 12in Kicker Comps Right Now In A Sealed Box I Built With My Bro And I Was Surprised How Hard They Pounded.. Put My Old Alpine S To Shame.. Any Way They Are In 2.6 Cubic Feet Each... I Was Thinking Of Porting My New 15in 2 Cvrs But I Have Heard Many Ported Systems In Trucks That Sound...