L-Acoustics ARCS WIDE

The L-Acoustics ARCS WIDE is a constant curvature WST enclosure. Within the ARCS WIDE and FOCUS family, it is designed to generate a wide coverage with few arrayed elements.

The ARCS WIDE loudspeaker enclosure is based on a 2-way passive design with a nominal impedance of 8 ohms. It features one 12″ LF speaker in a bass-reflex tuned enclosure and one 3″ diaphragm compression driver coupled to a DOSC waveguide. The cabinet is made of first grade Baltic birch plywood for optimum acoustical and mechanical integrity. A pole-mount socket receptacle is integrated into the cabinet and allows mounting the enclosure on top of an SB18m subwoofer.

The ARCS WIDE operates over a nominal frequency range of 55 Hz to 20 kHz. This response can be extended down to 32 Hz with the SB18m subwoofer. The DOSC HF waveguide generates a 30° x 90° symmetric directivity pattern.

Coupling bars allow arraying ARCS WIDE enclosures as a line with constant curvature, either vertically or horizontally. The DOSC waveguide in the HF region allows the system to be arrayed without breaking the inter-element acoustic coupling. The WST criteria are then fulfilled, so that such an array can be qualified as a true line source. Any WST line source provides a smooth tonal response and a coverage that is free of secondary lobes over the entire frequency range.

The ARCS WIDE is driven and amplified by the L-Acoustics LA4X or LA12X controller. These ensure system linearization, protection, and optimization for the loudspeaker system.


DAY: £40 + VAT

WEEK: £120 + VAT


  • 55 Hz – 20 kHz (-10dB) bandwidth
  • 30° x 90° symmetric directivity
  • 135dB maximum SPL
  • 450W RMS power handling capacity
  • IP 45 Protection Rating
  • 36kG



User Manual

Rigging Manual