Summary: Type: subwoofer; Size: 20 cm (8 in.); The number of bands: 1; Power: 80 W (nominal), 160 W (maximum); Sensitivity: 90 dB; Built-in amplifier: yes; Housing: yes; Enclosure type: closed box; Features: phase adjustment; Number of speakers: 1; Dimensions: 200 mm; Additional information: The cutoff frequency of 80-120 Hz (adjustable).; ...