The CX1428SA is an active powered subwoofer designed to provide strong low-frequency reinforcement for professional sound systems. With its 18-inch long-stroke woofer, it delivers deep, powerful bass suitable for line array systems, stage sound, mobile performances, events, and entertainment venues.

It uses a Class-D independent power amplifier and a high peak-power switching power supply for efficient and stable performance. The cabinet is made from marine-grade plywood, while the metal accessories are made from high-quality aluminium alloy, giving the subwoofer a durable and professional build.