The L-Acoustics Arcs Focus is a constant curvature WST® enclosure. Within the L-Acoustics Arcs Wide and Focus family, it is designed to generate a narrow coverage combined to a high SPL.
The L-Acoustics 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 L-Acoustics ARCS FOCUS is driven and amplified by the LA4X or the LA8 controller. These ensure system linearization, protection, and optimization for the loudspeaker system.
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