Yamaha HS 8S, Active 8"" Bass Reflex Subwoofer, 150 Watt, Frequency response: 22 Hz - 150 Hz, Low-cut switch, Low-cut control (80 - 120 Hz), High-cut control (80 - 120 Hz), Phase switch, Inputs: XLR, Outputs: XLR L / R and XLR for external sub, Dimensions: 300 x 350 x 389 mm, Weight: 12.5 kg