My system includes a 15" JL Audio sub in a ported box. The port is extra long so it hits really low. "Thanx for the tip Ryan!" My sub is currently being powered by an MTX 2300X amp. If this amp was a boxer, it would be a pound for pound champ! My front and rear speakers are by pioneer. The are being powered by a Planet Audio 3004 amp. I have a 2 Farad Cap with digital readout to keep the juices flowing. And when I want to turn heads I activate my epicenter. I know you true bass heads feel me on this one!