The K&F PASSIO SUB 15 is a compact and lightweight 15“ bass reflex subwoofer with integrated passive low-pass filter. It is particularly appropriate as bass extension for PASSIO, GRAVIS and the SONA Series. The enclosure has been designed for a modest appearance. The speaker front is protected by a grille, underlaid with opaque black foam. Two ergonomic handles on the side panels permit easy handling of the subwoofer. Due to its passive filter, the very efficient K&F PASSIO SUB 15 may be operated together with PASSIO, GRAVIS and SONA Series via one amplifier channel of K&F System Amplifiers.