The 15L is a dedicated LF / subwoofer system in a rectangular, computer optimized enclosure. Loudspeaker compliment consists of a single 15"LF woofer loaded into a vented sub-enclosure. The entire enclosure is constructed of durable 13-ply void-free birch laminate, dadoed for strength and durability. Handles are balance-optimized to faciliate transportation. Perforated steel is employed for frontal protection of the loudspeaker compliment.