SX SeriesInstalled SoundLive Sound


18" Passive Direct Radiating Subwoofer

Wavefront Precision SX118 Subwoofer
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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.

By adding the input board cover accessory, SX118 is fully weather resistant and suitable for permanent outdoor usage.

User guide Brochure Datasheet Settings [v1.9]
TYPECompact, 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
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
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
  • 16 x M8 inserts for optional castors
  • (W) 600mm x (H) 509mm x (D) 632mm
    (760mm including castors)
  • (W) 24in x (H) 20.36in x (D) 25.26in
    (30.38in including castors)
WEIGHT 43.5kg (96lbs) w/o castors 47kg (104lbs) with castors
Architectural Specs

The loudspeaker shall be a compact subwoofer consisting of an 18” reflex-loaded, long-excursion, low frequency transducer. The on-axis frequency response shall be 47Hz-150kHz +/- 3dB and the loudspeaker shall produce a maximum SPL of 138dB peak calculated at 1 metre.

Power handling shall be 1000W AES, 4000W peak. Rated impedance shall be 8 ohms. The rear connector panel shall be fitted with two NL4 type connectors and the loudspeaker shall be operated in conjunction with a dedicated controller amplifier.

The loudspeaker enclosure shall be constructed from multi-laminate plywood with a durable polyurea coating. The drivers shall be protected by a perforated Zintec grille and the enclosure shall be fitted with a threaded pole-mount plate, bar handles, skids and flying inserts.

Dimensions including skids, excluding castors (W x H x D) shall be 600mm x 509mm x 632mm (24in x 20.36in x 25.26in). Dimensions including skids and castors (W x H x D) shall be 600mm x 509mm x 760mm (24in x 20.36in x 30.38in). Weight shall be 47kg (104lbs).

The loudspeaker shall be the Martin Audio SX118.

Recommended Amplifier

For iK41, please refer to Compatibility chart on product page.

Available in this Series

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