FBT X-SUB 115SA | 15in - 135dB Powered Subwoofer | 1200W Class D with DSP & M20 Mount

Powered Subwoofer

The FBT X-SUB 115SA is a compact, high-output active subwoofer designed to enhance low-frequency performance for FBT X-LITE and X-PRO series speakers. Delivering deep bass down to 42Hz and up to 135dB peak SPL, it combines professional audio power with flexible system integration in a rugged, road-ready enclosure.

FBT X-SUB 115SA Competitive Differences

• 1200W RMS Class D amplifier for high-output bass performance
• 4 DSP presets with dual crossover options and stereo I/O

FBT X-SUB 115SA Description

The FBT X-SUB 115SA is built to meet the demands of touring musicians, DJs, and fixed installations alike. At the heart of this compact subwoofer is a high-excursion 15" woofer with a 3" voice coil, powered by a 1200W RMS Class D amplifier. The result is tight, powerful bass reinforcement down to 42Hz, making it the ideal low-frequency companion for FBT’s X-LITE and X-PRO series full-range speakers. Its integrated DSP processor offers four EQ presets, allowing users to match system voicing and crossover points to different venue requirements. The control panel includes stereo combo XLR/jack inputs, stereo XLR HP-filtered outputs, level control, 0°/180° phase switch, and LED status indicators for quick, intuitive operation. Constructed from 15mm (0.59") birch plywood and finished with a scratch-resistant black coating, the X-SUB 115SA is designed to withstand the rigors of live performance. The cabinet includes dual aluminum side handles, an M20 pole mount socket, and is compatible with optional 100mm transport wheels, offering a complete blend of performance, portability, and durability.

Model Features

• 1200W RMS Class D amplifier
• 15" woofer with 3" voice coil for deep bass response
• Frequency response down to 42Hz (-6dB)
• DSP with 4 presets and dual crossover options
• Stereo XLR/jack inputs with stereo HP-filtered XLR outputs
• 15mm birch plywood cabinet with scratch-resistant finish
• M20 pole mount and optional 100mm wheels

Model Specifications

• Max SPL: 135dB peak
• Power Output: 1200W RMS
• Frequency Response: 42Hz – 120Hz
• Cabinet Material: 15mm birch plywood
• Weight: 57.3 lb (26 kg)
• Transport Weight: 68.3 lb (31 kg)
• UPC: Not specified

What's In The Box

• Main unit
• Power cable
• Quick start guide