Passive Reflex Front‐Loaded Subwoofer ‐ 18″ ‐ 1100W ‐ 8ohm ‐ Frequency Response: 38Hz ‐ 270Hz (‐6dB) ‐ Max SPL (Calc.) (Cont/Peak): 133dB/139dB (Half‐space) ‐ Drivers: ‐ 18″, 4″ voice coil, long excursion, custom speaker ‐ Connectors: 2 x Neutrik NL4 ‐ Weight: 44 kg