FBT SUBLINE 112SA Active Subwoofer

FBT SUBLine 112SA Active Bass-Reflex Subwoofer

The SUBLine 112SA is a compact 12" active bass-reflex subwoofer from FBT's SUBLine series, designed for portable PA applications, DJ setups, and permanent installations where high output in a manageable enclosure is required. It is powered by a 700W RMS Class D amplifier with a switch-mode power supply, engineered and manufactured in Italy by FBT, and operates across a frequency range of 40 Hz to 140 Hz with a maximum SPL of 133 dB peak.

An onboard DSP provides 8 presets covering standard and DJ voicings at two LPF crossover frequencies (90 Hz and 140 Hz), including four cardioid configuration presets for use in arrays where rear dispersion needs to be minimised. The stereo XLR input allows a single subwoofer to receive both left and right signals from the source, with a separate XLR link output for connecting satellite speakers. An 8-step delay adjustment (0 to 6 m) and a 0/180-degree phase reversal switch enable precise system alignment with full-range tops. The M20 top-mount socket supports mounting a satellite speaker directly above the subwoofer.

Key Features

• 700W RMS Class D amplifier: FBT-engineered amplifier with switch-mode power supply, delivering 1400W peak output with high efficiency and minimal thermal load.
• 8 DSP presets: four standard and four cardioid configuration presets, each available at 90 Hz or 140 Hz LPF crossover frequency, covering Original and DJ voicings. Preset selection via rear panel rotary switch.
• Cardioid configuration presets: presets 5 through 8 configure the subwoofer for use in a cardioid array, reducing rear dispersion for stage-facing deployments and controlled sound fields.
• Stereo XLR in/out: stereo XLR input accepts left and right signals from the source, with XLR link output for connecting tops. Allows full stereo operation from a single subwoofer.
• 8-step delay adjustment: delay selectable in steps from 0 to 6 m for time-aligning the subwoofer with satellite speakers or other system components.
• Phase reversal switch: 0/180-degree switch for polarity alignment with the rest of the system.
• M20 top-mount socket: 20 mm top-mount pole socket supports satellite speakers directly above the subwoofer; compatible with standard M20 speaker stands and the optional FBT MSA 220BK sub-satellite mount.
• Birch plywood enclosure: 15 mm Baltic birch plywood with scratch-resistant black finish and internal bracing; two integrated aluminium ergonomic handles for transport.
• Made in Italy: designed, engineered, and manufactured by FBT Elettronica in Recanati, Italy.

Technical Specifications

• Manufacturer: FBT Elettronica (Italy).
• Model: SUBLine 112SA (Active 12" Bass-Reflex Subwoofer).
• System type: 1-way active.
• Configuration: Bass-reflex.
• Woofer: 12" (320 mm) high-excursion magnet woofer, 75 mm (3") voice coil.
• Amplifier: 700W RMS / 1400W peak, Class D, switch-mode power supply.
• Frequency response: 40 Hz – 140 Hz (-6 dB).
• Maximum SPL (continuous/peak): 130 / 133 dB.
• Input impedance: 22 kΩ.
• Crossover frequencies: 90 Hz or 140 Hz (preset-selectable).
• DSP presets: 8 (Original and DJ voicings at 90/140 Hz; presets 5–8 for cardioid configuration).
• Delay: 8 steps, 0 – 6 m.
• Phase switch: 0° / 180°.
• Input connectors: Stereo XLR (L + R).
• Output connectors: XLR link output.
• Stand mount: M20 (20 mm) top-mount socket.
• Enclosure: 15 mm birch plywood, scratch-resistant black finish.
• Dimensions (W × H × D): 430 × 447 × 480 mm.
• Net weight: 23 kg.
• Power consumption: 600 VA.
• Product code: 41223.

What's Included

• 1 × FBT SUBLine 112SA active subwoofer.
• 1 × Power cable (5 m).

Who Is It For?

• Mobile PA and live sound operators: at 23 kg with integrated aluminium handles and M20 pole mount, the SUBLine 112SA is practical for single-operator transport and fast setup in club, live, or event contexts.
• DJ setups: the dedicated DJ presets at both 90 Hz and 140 Hz crossover points are optimised for DJ source material, with the stereo XLR input allowing direct connection from a stereo mixer output.
• Installed sound: the delay control, phase switch, and cardioid presets provide the system alignment tools needed for permanent installations in bars, clubs, houses of worship, and sports venues.
• FBT system users: the 8 DSP presets are voiced to integrate directly with FBT active tops, including the Muse 210LA line array, with matched crossover and EQ curves for each pairing.

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