HK Audio Linear SUB 1500A - Aktiv Subwoofer15" bass reflex subwoofer Powerful punch and precision Frequency range down to 45 Hz Fits Linear 3 and Linear 5 Series Ideal as an extension to the Elements Easy Base, Smart Base and Line Base systems HK Audio Linear SUB 1500A Active Subwoofer 15" bass reflex subwoofer with a powerful punch and precision. Impressive bottom end down to 45 Hz. A powerhouse of a subwoofer that perfectly matches the midrange and tweeter units from the Linear 3 series. Can