Measuring 701mm wide x 525mm high x 704mm deep and weighing 55 kg, the MSUB18-I 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-I is the installation 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
Connectors2 x Cable gland with 2 cores cables
ConstructionBaltic Birch Plywood & textured black or white coating
Fittings8 x Side handles
Front FinishAcoustic fabric fitted from grill
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