L-Acoustics ARCS Focus

L-Acoustics ARCS Focus
L-Acoustics ARCS Focus

The ARCS FOCUS is a constant curvature WST enclosure. Within the ARCS WIDE and FOCUS family, it is designed to generate a narrow coverage combined to a high SPL. The ARCS FOCUS 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 FOCUS 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 15° x 90° symmetric directivity pattern. Coupling bars allow arraying ARCS FOCUS 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 FOCUS is driven and amplified by the LA4X or the LA8 controller. These ensure system linearization, protection, and optimization for the loudspeaker system.

  • Optimized for medium-throw rental and installation applications
  • Plug-and-play package, quick set-up and easy flying
  • Scalable directivity from 15° x 90° to 360° x 90° by 15° increments
  • Fills, distributed systems, FOH, central clusters
  • Innate LF resources, possible extension with SB18 subwoofers
  • LA4X/LA8 drive and protection, same preset for WIDE and FOCUS
  • IP 55 protection rating

Usable bandwidth (-10 dB)

55 Hz - 20 kHz ([ARCS_WIFO] preset)

Maximum SPL

137 dB ([ARCS_WIFO] preset)

Coverage angle (-6 dB)

15° x 90°


LF: 1 x 12’’, weather-resistant, bass-reflex
HF: 1 x 3’’, diaphragm compression driver, DOSC waveguide

Nominal impedance

RMS power handling

450 W


IN: 1 x 4-point SpeakOn
LINK: 1 x 4-point SpeakOn

Rigging components

Rigging rails and WIFORIG coupling bars

W x H/h x D

365/252 x 759 x 444 mm
14.4/9.9 x 29.9 x 17.5 in

Weight (net)

38 kg/84 lb

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Magna-Tech Electronic Co., Inc.
6114 NW 74th Ave.
Miami FL 33166 USA
Phone: (305) 573-7339
Fax: (305) 573-8101
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