SB18i is the fixed installation subwoofer designed for WST line sources and coaxial systems, lowering the combined system operating range down to 32Hz. Its compact size and streamlined rigging make it extremely well suited for flown coupled configurations with KARA (i). 18-inch transducer with a dual bass-reflex tuned enclosure provides exceptional impact and high sensitivity, low thermal compression and reduced distortion. The vents feature a progressive profile allowing laminar airflow and reduced turbulence noise even at the very highest operating levels.