The SX118 is a compact, high performance subwoofer that extends the low frequency operating range of the system to 47Hz and provides exceptional low frequency output for such a compact enclosure.


Please note this product has been updated since January 2019 from an earlier iteration.



  • Compact, direct radiating subwoofer
  • 18” (460mm)/4” (100mm) voice coil, long excursion, ferrite magnet, waterproof cone
  • High output capability
  • Tour-grade plywood enclosure with flying inserts



  • Touring sound reinforcement for small and medium-size venues
  • Fixed installations in concert halls, theatres, ballrooms and HoW
  • Sports stadium, arena installations & corporate AV events
  • Outdoor restaurant, bar and hotel entertainment areas
  • Concourses and Theme Parks


SX118 features a long-excursion 18” (460mm)/4” (100 mm) voice coil driver with a water-resistant cone and triple roll surround in a compact reflex enclosure.


The design of the 18” driver maximises output while minimising power compression and distortion, and the four reflex ports have a large frontal area to reduce turbulent air noise at very high levels. The enclosure is constructed from multi-laminate birch ply, finished with a durable polyurea coating and equipped with a Zintec grille, twin grab handles, skids, flying inserts for installation and a threaded pole socket for pole-mounting point source loudspeakers or up to 4 WPM enclosures as a simple plug-and-play system.


The product is supplied as standard without cabinet wheels, but they are available as an accessory.

    Martin Audio SX118 - Compact 18" Passive Subwoofer

    SKU: GDSSX118
    £1,500.00 Regular Price
    £1,259.93Sale Price
    • TYPE Compact, direct radiating subwoofer
      FREQUENCY RESPONSE (1) 47Hz – 150Hz ±3dB,
      -10dB @ 41Hz
      DRIVER 18” (460mm)/4” (100mm) voice coil, long excursion, ferrite magnet, waterproof cone
      RATED POWER (2) 1000W AES, 4000W peak
      SENSITIVITY (10) 102dB
      MAXIMUM SPL (9) 138dB peak
      DISPERSION (-6DB) Omnidirectional/or Cardioid (paired)
      ENCLOSURE Multi-laminate birch/poplar ply
      FINISH Durable Polyurea Coating
      PROTECTIVE GRILLE Black perforated Zintec
      CONNECTORS 2 x NL4 type
      PIN CONNECTIONS (INPUT) LF: +1, -1 Link through: +2, -2
      PINS CONNECTIONS (LINK) LF: +1, -1 Link through: +2, -2
      • Two skids on base, with mating channels on top
      • M20 top-mounted thread plate for pole mounting
      • 16 x M10 mounting points
      • 2 x bar handles, 1 on each side
      • 4 x fittings for optional transit cover
      • (W) 600mm x (H) 509mm x (D) 632mm
        (760mm including castors)
      • (W) 23.62in x (H) 20.04in x (D) 24.86in
        (29.90in including castors)
      WEIGHT 43.5kg (96lbs) w/o castors 47kg (104lbs) with castors


    Product Rating

    “By far the best service I’ve ever experienced. I was importing a product to Canada and the whole experience was quick, easy and seamless. These guys really care about running a good business. Not to mention the price was cheaper than the stores here even after importing. Definitely will do more business in the future.” 

    —  Philip Manzon

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