The MUSE 118FSA FSCA is a purpose-built active subwoofer designed for integration into professional audio systems requiring precise low-frequency control and high sound pressure levels. Featuring a hybrid band-pass cardioid configuration, the MUSE 118FSA FSCA provides a balanced combination of acoustic performance, power efficiency, and directional control. This makes it particularly suitable for live sound applications, touring systems, fixed installations, and environments where minimising rearward sound dispersion is critical. Its ability to be flown in either forward- or rear-firing orientation, along with front- or rear-mountable grilles and amplifier modules, allows for optimised cardioid array configurations while maintaining aesthetic consistency across installations. The MUSE 118FSA FSCA incorporates an 18-inch B&C neodymium high-excursion driver and a 3-inch voice coil, powered by a 1200-watt Class D amplifier with a switch-mode power supply for reliable operation across demanding conditions. Operating from 33Hz to 1Hz, it delivers extended low-frequency response with minimal distortion. The subwoofer’s laminar-flow port design reduces air turbulence and power compression, ensuring consistent acoustic output and mechanical reliability. Designed for full compatibility with the MUSE 210La line array system, the MUSE 118FSA FSCA plays a vital role in applications where precise sub-bass control, acoustic coherence, and scalable deployment are essential for high-quality sound reinforcement.