FBT X-Sub18SA 18″ powered subwoofer, 1200W RMS Class D amp, 38Hz – 120Hz freq resp.


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The FBT X-Sub18SA is a 1200w processed active subwoofer that is fitted with a 18-inch woofer and features a compact band reflex design that helps deliver a high output and punchy bass response. The 18-inch high excursion woofer comes with a 3-inch voice coil which works to give you a frequency response that ranges from 38 – 120Hz.

Added to the range is the X-sub15SA, which joins the popular X-Sub18SA as a deceptively compact but extremely powerful low end solution.

The X-Sub18SA comes equipped with a powerful 1200w Class D amplifier that makes use of a switch mode power supply for ease of use and provides rich additional low-frequency reinforcement when used in conjunction with the X-Pro or X-Lite series of speakers. This subwoofer is also equipped with an impressive Digital Signal Processor that offers six specialized EQ presets with low-pass filter crossover settings that allow you to achieve an incredible sound whatever the situation.

The FBT X-Sub18SA is housed in a super-robust 18mm plywood cabinet that is finished with scratch and scuff resistant paint, so you don’t need to worry about accidental knocks and bumps. The cabinet is also fitted with an M20 top mount speaker stand socket as well as two FBT designed aluminium handles for ease of transport.

On the rear of the speaker you’ll find a control panel that provides you with stereo XLR/Jack combo in/outputs as well as stereo XLR high-pass filter outputs, controls for volume and EQ presets, a phase reversal switch and status LED indicators.

This compact subwoofer is perfect for a range of applications including mobile entertainers, music venues, live events, schools, and theatres as well as club and bar venues.


  • A very compact 18″ bandpass subwoofer
  • 1200 watt class D power amplifier
  • DSP with 4 presets
  • Frequency response: 38-120 Hz
  • Stereo input
  • Link output
  • HP output
  • Phase switch: 180°
  • M20 stand flange mount
  • Dimensions (W x H x D): 510 x 692 x 650 mm
  • Weight: 34 kg


X-SUB 18SA_datasheet