Subwoofer series auna linie 300 power rating 250 watt system 1 way system principle active frequency response 40 180 hz impedance 8 ohm amplifier type digital colour white control features volume control adjustable transition frequency switchable phase control design front firing subwoofer speaker enclosure bass reflex number of subwoofers 1 bass chassis 250 mm speaker terminals clamp contacts analogue input analogue audio input rca width 440