Measuring 701mm wide x 525mm high x 704mm deep and weighing 55 kg, the MSUB18 is the same width as the GEO M12 main cabinet, and 41% higher. Cabinets are constructed from Baltic birch ply with large composite bumpers on the corners, and feature integral rigging. Employing a single 18″ diameter voice coil Neodymium driver in a high-efficiency band pass cabinet design with a quadratic shaped profiled port, the MSUB18 can be deployed in Omni or Cardioid modes and is available in black, white or custom RAL colours. The MSUB18 is the touring version.

Key Features

  • Very high power, arrayable sub that can be stacked or flown, with or without its companion main element the GEO M12
  • Integrated rigging hardware with no loose parts
  • Front and rear connectivity for cardioid (front to back) implementation
  • Comprehensive range of versatile, multifunction accessories for deploying the MSUB18 in a wide variety of applications
  • Available in black, white and custom RAL colours


Frequency Response @-6 dB32 Hz to 120 Hz
Sensitivity 1W@1m107 dB SPL Nominal
Peak SPL@1m139 dB
Available Crossover Frequencies32-65, 32-75, 32-85, 32-95, 32-120 Hz
Nominal Impedance4 Ohms
Recommended Power2000 Watts


Component1 x 18” 4 Ohms very long excursion Neodymium driver
Height x Width x Depth525mm x 701mm x 704mm (20.6” x 27.6” x 27.7”)
Weight: Net55 kg / 122 lbs
Connectors4 x NL4, 4 poles connectors (1+/1- MSUB18 / 2+/2- Through)
ConstructionBaltic Birch Plywood & textured black or white coating
Fittings8 x Side handles
Front FinishSteel front grill + back mesh
Operating temperature range0°C - 40 °C
Storage temperature range-20 °C - 60 °C

System Operation

Recommended powering solution – NXAMP4x4 Powered TDcontroller: 2 x MSUB18 per channel

Optional powering solution – NXAMP4x1mk2 Powered TDcontroller (Bridged): 1 x MSUB18 per channel

Optional powering solution – NXAMP4x2mk2 Powered TDcontroller: 1 x MSUB18 per channel