The LA400 single 12-in bass horn – known as the SuperSub, Jr.™ – contains bass horn technology that was developed for the KF940/BH822e SuperSub dual 12-in bass horn which is setting a new standard for large-scale sub bass performance. It loads a powerful woofer on a bent bass horn to provide very high output sub bass response in a compact, portable very high output sub bass response in a compact, portable enclosure.