The SUBLINE 112SA is a professional active subwoofer engineered for precise low-frequency enhancement in a range of live sound and installed audio environments. Designed and manufactured by FBT, it delivers reliable, high-output performance suitable for both portable PA systems and fixed installations. The SUBLINE 112SA incorporates a bass-reflex enclosure housing a 320mm high-excursion magnet woofer with a 75mm voice coil, offering a frequency response from 40Hz to 140Hz. Powered by a dedicated 700W RMS Class D amplifier developed in-house, the system achieves a maximum sound pressure level of up to 133dB. Integrated DSP functionality provides eight user-selectable presets, dual EQ modes, two low-pass filter options, and cardioid configuration support for enhanced control and adaptability in different acoustic spaces. Connectivity is offered via stereo XLR inputs and outputs, and the control panel includes volume adjustment, delay settings from 0.25 to 3.5 metres, phase reversal, and three LED status indicators. The SUBLINE 112SA is constructed from robust 15mm birch plywood with internal bracing and a durable scratch-resistant finish, making it a dependable choice for touring professionals and audio integrators. A 20mm top-mounted speaker stand socket and two ergonomic aluminium handles ensure convenient deployment. Ideal for corporate events, performance venues, and AV rental operations, the SUBLINE 112SA represents a sound investment in high-quality, scalable low-frequency reinforcement.