CDD/CDD-WR SeriesInstalled Sound


Weatherised Dual-driver, Direct-Radiator Subwoofer

CSX218 Subwoofer
This is now a legacy product.
We recommend SX218

The CSX218-WR achieves the ultimate in subwoofer performance for the most prestigious CDD-WR Series applications – delivering very high output levels and superb transient performance with minimal distortion and suitable for outdoor applications where it will be subject to changing environmental conditions but sheltered from direct exposure to the elements. With an operating range of 35Hz-150Hz ± 3dB, it houses dual 18” long-excursion (460mm)/4” (100mm) voice coil drivers with water-resistant cones and triple roll surrounds. Each driver is rated to handle 1000 watts AES, and has a magnet structure and suspension engineered for maximum linear excursion.


  • Dual-driver, direct-radiator subwoofer
  • 2 x 18” (460mm) drivers with 4” (100mm) voice coils
  • Water resistant cones
  • Very high output capability
  • Large ports for reduced air noise
  • Zinc plated mild steel grille with powder coated finish
  • Plywood cabinets with polyurea coating
  • Operating temperature -20°C to +70°C
  • Environmentally tested to meet IP24
  • Flying points with fixings made from stainless steel
  • Black or white standard colour options


  • Outdoor Restaurants
  • Bars
  • Hotel Areas
  • Nearfield Systems in Outdoor Stadia
  • Transport Hubs
  • Concourses and Theme Parks

The enclosure of the CSX218-WR is constructed from plywood with polyurea coating, while the drivers are protected by a water and particle resistant zinc plated mild steel grille with powder coated finish.

Finished in black (RAL9005) or white (RAL9016) as standard, the CSX218-WR is supplied fitted with flying points and fixings made from stainless steel.

When used with CDD full-range systems, crossover and EQ functions can either be performed by the DX0.5 or DX4.0 system controllers, or by an iKON amplifier

Brochure Datasheet Settings
TYPEDual-driver, direct radiating subwoofer.
-10dB @ 30Hz
DRIVER2 x 18” (460mm)/4” (100mm) voice coil, long excursion, ferrite magnet, waterproof cone
RATED POWER (2)2000W AES, 8000W peak
MAXIMUM SPL (9)138dB continuous, 144dB peak (half space).
DISPERSION (-6dB)Omnidirectional
CROSSOVER80-120Hz active
ENCLOSURE330 litre, Exterior grade Plywood, Flying points with fixings made from stainless steel.
FINISHBlack or white Poly Urea coating.
PROTECTIVE GRILLEBlack or white zinc plated mild steel grille with powder coated finish.
CONNECTORSLow profile 20A push-lock. weatherproof input panel cover with cable gland.
PIN CONNECTIONSLeft to right: Input+, Input -, Link -, Link+
DIMENSIONS(W) 1085mm x (H) 530mm x (D) 780mm*
(W) 42.7ins x (H) 20.9ins x (D) 30.7ins*
* - 905mm/35.6ins with wheels
WEIGHT85kg (187.4lbs)
Architectural Specs
Martin Audio CSX218-WR

The loudspeaker shall be a subwoofer consisting of two 18” reflex-loaded, long-excursion, low frequency transducers with water-resistant cones.

The on-axis frequency response shall be 35Hz-150kHz +/- 3dB and the loudspeaker shall produce a maximum SPL of 144dB peak calculated at 1 metre. Power handling shall be 2000W AES, 8000W peak. Rated impedance shall be 4 ohms. The loudspeaker shall be operated in conjunction with a dedicated electronic controller.

The input connector shall be a low-profile 20A push-lock type with a waterproof cover incorporating a cable gland. The enclosure shall be constructed from plywood finished with a polyurea coating and flyable via fitted threaded inserts with stainless steel screws. The drivers shall be protected by a perforated, zinc-plated steel grille with a powder coated paint finish. The loudspeaker shall meet the IP24 environmental rating.

Dimensions excluding wheels (W x H x D) shall be 1085mm x 530mm x 780mm (42.7in x 20.9in x 30.7in). Weight shall be 85kg (187.4lbs).

The loudspeaker shall be the Martin Audio CSX218-WR.

Technical Drawings & 3D Models
Martin AudioCSX218-WR Tech Drawing

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Technical Drawings for CSX218-WR



3D SketchUp Models for CSX218-WR

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Revit File 

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