MTSub 218i

AUDIOFOCUS install High performance 2 x 18″ subwoofer

TransducersLF : 2 x 18″
SPL peak / 1m (measured)140 dB
Weight89,5kg / 197.31lbs
RiggingPole mount
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MTSub 218i is a powerful, state-of-the-art passive subwoofer, designed to complement our FR-X and ARES series in theatres, performance venues, houses of worship, and other installations requiring excellent audio quality at a real-world price point.

The MTSub 218i subwoofer houses two long-excursion 18″ neodymium drivers in a bass-reflex design and delivers outstanding SPL in stand-alone or stacked configurations.

MTSub 218i can be quickly deployed in any configuration, including cardioid and end-fire, when used with AUDIOFOCUS A Series amplifiers. Armonia presets are also available for Powersoft amplifiers.

MTSub 218i is built with pride in Belgium and coated in tough, weather-resistant polyurea to safeguard your investment. The cabinet front is protected by a rigid metal grill, backed by acoustically transparent foam.


  • Cardioid / end fire setups
  • Compact format
  • Optimized for installation
  • 2 x 18″
  • Pole mount socket
  • Passive

Technical specifications

DescriptionHigh power installation subwoofer
Transducers LF: 2 x 18″
Frequency range (-6dB)38Hz-110 Hz
SPL peak (1)140 dB
ProcessingDedicated AUDIOFOCUS and Powersoft Armonia omni and cardioid presets
Connectors2 × 4-point speakON
Nominal Impedance4ohm
Watt AES/peak1200/4800W
Dimensions (H x W x D)1200 x 605 x 800 mm
47.24 x 23.81 x 31.49 inches
Weight89.5kg / 197.31lbs
FinishHighly resistant polyurea coating

CabinetHigh grade birch plywood

(1) Peak level measured at 1 m under free field conditions using pink noise with crest factor 5

A Series Output Chart
MTSub 218

PDF • 156 Kb • 19/04/2024

Gll files for Ease
and Easefocus

Gll • 1.69 Mo • 06/01/2022

Gll files for Ease
and Easefocus Stack

Gll • 1.88 Mo • 06/01/2022

Powersoft Presets
MTSub 218i

Zip • 17 Kb • 22/05/2024

SCiO Presets
MTSub 218i

Zip • 43 Ko • 09/01/2023