Direct radiation sub is our entry level sub for simplified design and cost. all our SW1X subs are vented design for reletive low cost and optimized performance.

Twin asymmetrical sub is designed for optimized output for limited size, Curve in red is SW212, Curve in green is SW115 vented sub, they are very similar size.

HSW series horn load subwoofer is designed for extremely hight quality and very loud application, by stack 2 or 4 horn load subs together the horn flare area is optimized for the highest efficiency,see FAQ for comparison.