Applications: Medium scale venues including stadium, concert hall, auditorium, theater, clubs, touring show, rental market etc. The B18A+ is a single 18" sub woofer designed to be flown with the A10+ Line Array System. The B18A+ can also be ground stacked and used with A10a+. which can be used in a several convenient configurations.(2+1 , 4+1 , 4+2,8+4) FEATURES:Powerful 1000 W sub woofer ...