[31.5cm]
This is a high-performance passive radiator from the "Dayton Audio Reference" series. SMS (Sandwich Mass System) allows greater linearity with minimal angle torque. Durable and compliant suspension ensures substantial linear movement and mechanical stability. Thick black anodised aluminum cone and strong aluminum die-cast frame. Screw rod with lock nut for easy tuning frequency adjustment, 775 gram weighted disc included for simple tuning adjustment. "