FBT SUBline 115SA White | 15in - 135dB | 700W Active Subwoofer

FBT SUBline 115SA White  (FBT SUBline-115SA-White)

Active PA Subwoofer

FBT SUBline 115SA White is a 15-inch active subwoofer designed to add powerful low-frequency extension to live sound systems, DJ rigs, event production setups, and installed audio systems. With a 700W RMS Class D amplifier, DSP presets, bass-reflex cabinet design, and up to 135dB peak SPL, it delivers high-output bass in a compact, transport-friendly enclosure.

FBT SUBline 115SA White Competitive Differences

• 15-inch high-excursion woofer with 3-inch voice coil delivers strong low-frequency punch
• 700W RMS / 1400W peak Class D amplifier provides high-output powered subwoofer performance
• DSP with 8 presets, EQ options, crossover settings, delay, phase reversal, and cardioid configuration support
• Stereo XLR input/output connectivity allows one subwoofer to feed left and right speaker systems
• 15mm birch plywood enclosure with internal bracing and integrated aluminum handles for portable and installed use

FBT SUBline 115SA White Description

The FBT SUBline 115SA White is built for users who need compact, powerful low-frequency reinforcement without sacrificing transportability or system flexibility. Its bass-reflex design and 15-inch high-excursion woofer help deliver deep, punchy bass for live music, DJs, corporate events, houses of worship, and fixed installations.

Powered by an FBT-engineered 700W RMS Class D amplifier, the SUBline 115SA White produces up to 132dB continuous SPL and 135dB peak SPL in half-space conditions. The onboard DSP provides useful system tuning options, including 8 presets, EQ selection, low-pass crossover settings, delay, phase reversal, and cardioid configuration support for more controlled subwoofer deployment.

The control panel includes stereo XLR inputs and outputs, high-pass output, volume control, EQ presets, 8-step delay from 0.25m to 3.5m, a 0°/180° phase reversal switch, and status LED indicators. This makes the subwoofer easy to integrate into stereo PA systems, single-subwoofer setups, or larger configurations using compatible FBT speakers.

Designed for real-world professional use, the SUBline 115SA White features a 15mm birch plywood scratch-resistant enclosure with internal bracing, two ergonomic aluminum FBT handles, and an M20 top mount speaker stand socket. The Neutrik TRUE1 power connection provides a secure locking power connection for dependable performance in mobile and installed environments.

SUBline 115SA White Features

• 15-inch active subwoofer in white finish
• Bass-reflex design for high SPL and punchy low-frequency response
• 15-inch high-excursion magnet woofer with 3-inch voice coil
• 700W RMS Class D amplifier engineered and manufactured by FBT
• 1400W peak amplifier power
• DSP with 8 presets for system matching and tuning
• 2 EQ options with 2 low-pass crossover settings
• Cardioid configuration support
• Stereo XLR input/output connectivity with loop and high-pass output
• Volume control, EQ presets, delay, phase reversal, and status LED indicators
• 8-step delay adjustment from 0.25m to 3.5m
• 0°/180° phase reversal switch
• Neutrik TRUE1 locking power connection
• 15mm birch plywood scratch-resistant enclosure with internal bracing
• M20 top mount speaker stand socket
• Two aluminum ergonomic FBT handles
• Optional wheels available

SUBline 115SA White Specifications

• Product Type: Active subwoofer
• Configuration: 1-way
• Color: White
• Built-In Amplifier Power: 700W RMS
• Built-In Amplifier Peak Power: 1400W
• Amplifier Class: Class D
• Low Frequency Driver: 15 in (380 mm) woofer
• Voice Coil: 3 in (75 mm)
• Frequency Response: 38 Hz – 140 Hz (-6 dB)
• Maximum SPL Half-Space Continuous: 132dB
• Maximum SPL Half-Space Peak: 135dB
• Dispersion: Omnidirectional
• Input Impedance: 22 kΩ
• Crossover Frequency: 90 Hz or 140 Hz
• DSP Presets: 8
• Delay: 8 steps from 0.25m to 3.5m
• Phase: 0° / 180° switchable
• Input Connector: Stereo XLR with loop and high-pass output
• Power Connection: Neutrik TRUE1
• AC Power Requirements: 640 VA
• Power Cord Length: 6 m
• Cabinet Material: 15mm birch plywood with internal bracing
• Speaker Pole Mount: M20 top mount socket
• Handles: 2 aluminum ergonomic FBT handles
• Dimensions: 19.7 x 20.4 x 22.4 in (500 x 517 x 570 mm)
• Weight: 61.7 lb (28 kg)
• Transport Dimensions: 23.6 x 24.3 x 26.4 in (600 x 617 x 670 mm)
• Transport Weight: 70.5 lb (32 kg)