The Reflex SB221 is a high-power sub bass enclosure designed to operate over the 34 – 95 Hz pass band. The Reflex SB221 has a range of applications within both touring and fixed installation. It may be combined with MQ, or Optima range products within fixed installation or used as a ground stacked infra sub bass for larger Optima array systems.

The cabinet houses a pair of 21” long excursion cone driver’s with neodymium magnet structures which are loaded into a twin chamber band pass structure. The enclosure is manufactured from 18mm birch plywood and coated in a heavy duty polyurea finish. The cabinet front has a protective steel grill coated in a water-resistant powder coat finish which has an acoustically transparent filter medium bonded to its back surface. Each cabinet has eight handles and the option of rear panel mounted castors. The cabinet base has polyethylene runners and the cabinet top panel housings to aid stacking cabinets in vertical columns. Three cabinets in a vertical stack have the option of being used in a cardioid mode with the bottom cabinet inverted.