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The S-218S is a professional subwoofer designed to complement and extend the low frequency output of any S series full-range loudspeaker.

Solidly constructed to ensure an accurate acoustic response that is uncolored by enclosure resonance, the rugged design of the S-218S handles the rigors of the road with ease.

The unit is characterized by a deep, powerful and compelling low frequency response that does not sacrifice speed of attack. The result is a rapid, punchy sonic signature coupled with sustained drive, enabling the 218S to easily handle most any musical challenge or special effects requirement.

Its high power and low distortion output provide accuracy and precision for musical styles including reggae, house, dance, ska, rock, metal and even dramatic classical productions.

The SONUS-218S employs internal DYNA-TECHTM protection circuitry. Using only the power from the amplifier, DYNA-TECH actively prevents driver damage, even under severely abusive operating conditions.

Equipped with threaded rigging fittings, Ergo-Grip transport handles, integrated casters, and a stand receptacle that extends to the bottom of the enclosure for extra stability, the S-218S easily meets the demanding requirements of rental companies, touring musicians, Mobile DJs and other professional users.


  • Integrated Tilt-back Casters
  • DYNA-TECH Dynamic Protection
  • Switchable Hi-Pass / Parallel Output
  • Patented Cool-CoilTM Heat Evacuation Technology
  • Dual NL4 and Dual 1/4” Input / Output Connectors
  • Four M10 Threaded Rigging Fittings
  • Internal Stand Fitting Sleeved to Bottom of Enclosure for Stability

System Specifications:

  • Format: Subwoofer, vented bass - switchablehi-pass/parallel output
  • Operating Range: 30 Hz - 1 kHz
  • Frequency Response: 40 Hz - 200 Hz (±3 dB)
  • Dispersion (-6 dB): 360º H x 180º V
  • Maximum SPL @1m: 125 dB continuous / 132 dB peak
  • High Pass Output: 150 Hz (driving 8 ohm load).Switchable between Hi-Pass Out or Parallel Operation.
  • Sensitivity in SPL (1W/1m half space): 100 dB (50 Hz- 160 Hz, 1/3 octave)
  • Max Power Handling: 600W RMS, 1500W Program / 2970WPeak
  • Impedance: Nominal 4 ohms / Min. 3.2 ohms at 120Hz
  • Low Frequency Transducers: 2 x 18" (457mm) 300W RMS, 750W Program (eachdriver)

Mechanical Specifications:

  • Enclosure: 11-ply cross-laminated birch
  • Finish: Black catalyzed polyester paint
  • Rigging Provisions: Four M10 threaded riggingfittings (two on each enclosure end)
  • Grille: Steel, powder coated black
  • Dimensions (H x W x D): 21.4" x 44.4" x 24" (544 x1128 x 610 mm)
  • Net Weight: 127 lbs. (57.6 kg)

SONUS-218S Spec. Sheet