The KSL-GSUB is a cardioid subwoofer designed specifically for ground-stacked configurations within the KSL System, providing low frequency extension for KSL8 and KSL12 loudspeakers. This high-performance subwoofer features an active 2-way bass-reflex architecture and houses three long excursion 15-inch neodymium drivers. Two drivers project forward, while one is rear-facing, with each operating in separate bass reflex chambers powered by individual amplifier channels. The KSL-GSUB delivers a cardioid dispersion pattern that significantly minimises rearward sound radiation, enhancing clarity by reducing low frequency build-up in reverberant environments. Its frequency response ranges from 36 Hz to 105 Hz, or from 33 Hz to 75 Hz when operated in INFRA mode. Constructed from marine-grade plywood and finished with durable Polyurea Cabinet Protection, the KSL-GSUB is engineered for reliability in demanding conditions. Runners on the base and interlocking recesses on the top provide stability when stacking multiple units. The cabinet is front and rear shielded by robust metal grilles.
Medium to large format cardioid subwoofer
- Components 3 x 15”
- Dispersion Cardioid
- SPLmax 139 dB
- Weight 78 kg / 172 lb









