Subwoofer power rating 170 watt effective output 220 watt system 1 way system principle active frequency response 37 200 hz crossover frequency 40 120 hz amplifier type digital housing surface veneer vinyl control features volume control switchable phase control design front firing subwoofer speaker enclosure bass reflex number of subwoofers 1 bass chassis 230 mm analogue input analogue audio input rca width 307 mm height 288 mm depth 3