The LA-I5SUB Is an ultra-low frequency speaker specially designed for usage with the LA-206 line array. The LA-I5SUB is a bass reflex tuned speaker with a 15 “speaker unit that provides exceptional cone- covered properties even under very high sound pressure operating conditions, and very low thermal compression. The Inverted hole design of the bass reflex is more advanced and more conducive to the flow of air. Compared with previous products, the composition of LA-I 5SUB Is more modern with the new air hole design, which greatly improves the sound pressure level output. Application: large and medium-sized outdoor performances, sports venues and bar main sound expansion.