I Agree

We use cookies to deliver our services. By using our website, you agree to the use of cookies as described in our Cookie Policy.

Wavefront PrecisionInstalled SoundLive Sound


Dual-driver, Direct Radiating Subwoofer

SX218 | Dual-driver, Direct Radiating Subwoofer | Wavefront Precision Series
Where to Buy or Rent

The SX218 achieves the ultimate in subwoofer performance for the most demanding applications – delivering very high output levels and superb transient performance with minimal distortion it is the perfect partner to WPC, with one subwoofer to every 2 top boxes required.


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


  • Live sound reinforcement
  • Theatre sound
  • Corporate AV events

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.

The enclosure is constructed from multi-laminate birch ply and coated with hard-wearing textured paint. Eight reflex ports provide a large frontal area to reduce turbulent air noise, and a perforated steel grille protects the drivers from damage.

Brochure Datasheet Settings [v4.1]
TYPEDual-driver, direct radiating subwoofer
FREQUENCY RESPONSE (1) 35Hz – 150Hz ±3dB,
-10dB @ 30Hz
DRIVER 2 x 18” (460mm)/4” (100mm) voice coil, long excursion, ferrite magnet, waterproof cone
RATED POWER (2)2000W AES, 8000W peak
DISPERSION (-6dB) Omnidirectional/or Cardioid (paired)
ENCLOSUREMulti-laminate birch/poplar ply
FINISHBlack textured paint
PROTECTIVE GRILLEBlack perforated steel
PIN CONNECTIONS (INPUT) LF1: 1+, 1- LF2: 2+, 2-
PINS CONNECTIONS (LINK) LF1: 1+, 1- LF2: 2+, 2-
  • Two skids on base, with mating channels on top
  • Four rear-mounted 100mm (4in) castors
  • 24 x M10 mounting points
  • 4 x bar handles, 2 on each side
  • 4 x fittings for optional transit cover
  • (W) 1085mm x (H) 537mm x (D) 792mm
    (920mm including castors)
  • (W) 42.7in x (H) 21.1in x (D) 31.2in
    (36.2in including castors)
WEIGHT102kg (225lbs)
Architectural Specs
Wavefront Precision SX218

The loudspeaker shall be a subwoofer consisting of two 18” reflex-loaded, long-excursion, low frequency transducers. 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 8 ohms per driver. 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 textured black coating. The drivers shall be protected by a perforated steel grille and the enclosure shall be fitted with bar handles, skids and flying inserts.

Dimensions including skids, excluding castors (W x H x D) shall be 1085mm x 537mm x 792mm (42.7in x 21.1in x 31.2in). Dimensions including skids and castors (W x H x D) shall be 1085mm x 537mm x 920mm (42,7in x 21.1in x 36.2in). Weight shall be 102kg (225lbs).

The loudspeaker shall be the Martin Audio SX218.

Martin Audio Wavefront Precision SX218 Tech Drawing

Technical Drawings for Wavefront Precision SX218.
All information is Copyright. Martin Audio Ltd.


Available in this Series

How Can We Help?

If you have an audio project, whether that’s a Live Event or an Installation, and would like some expert advice or interested in a demo, please register your details

Get Project Advice
Return to Site

All material © 2017.
Copyright Martin Audio Ltd.
Subject to change without notice.
Martin Audio Ltd. Reg. No. 4824341

Martin Audio and the Martin Audio Logo are trademarks of Martin Audio Ltd and are registered in the United Kingdom, United States and other countries.