The Beta Three® CSB218A Cinema Series subwoofer loudspeaker utilises a high power low frequency driver with a structurally solid enclosure. The CSB Series subwoofer loudspeaker delivers extended low frequency bandwidth with excellent punch for Digital Cinema installations. Construction Transducers 18"×2 Frequency response(-3dB) 40HZ-1.6KHZ Rated power 1000W (RMS) Sensitivity (1W @ 1m) 102dB Maximum SPL (1W @ 1m) Rated Impedance 4Ω Dispersion (H×V) N/A Connector Spring clip Dimensions (W×H×D) 1250×550×800mm Packaging Dimensions (W×H×D) 1350×650×900mm Net Weight 105.5kg Gross Weight 112.0kg