ARCS - Medium Format Line Source

The ARCS® features a bi-amplified design, an advanced enclosure tuning with a custom DOSC® waveguide for a remarkable clarity and coherence. When arrayed, ARCS® radiates a constant curvature wavefront of 22.5° x the number of enclosures. Vertically, the enclosure provides an asymmetrical coverage of 60° (- 20° by + 40° of site angle).

The system can be arrayed both horizontally and vertically to fulfill multiple application requirements in terms of audience geometry, type of event and program material. When combined with the SB28 subwoofer, ARCS® delivers an extended LF contour with added impact. Whether permanently installed, on the road as a standalone FOH system or a complement to another WST® line source, ARCS® naturally deploys all the power of WST®, offering a unique near-field listening experience throughout the audience.

L-ACOUSTICS^® pioneered the field of modern line source array as early as 1993 with the introduction of Wavefront Sculpture Technology on the legendary V-DOSC^® system.

Based on physical rules developed by Heil and Urban (AES 1992) the WST^® theory defines five criteria for design and use of true line source arrays. At the heart of Wavefront Sculpture Technology is the internationally-patented DOSC^® waveguide, which morphs the spherical wavefront of the HF driver into a cylindrical, isophasic wave

In combination with WST^®, coplanar symmetry - the equivalent of coaxial assembly for HF, MF and LF drivers in vertical arrays - provides a coherent wavefront over the entire horizontal coverage at all frequencies. This behaves as if the sound was radiated by a single, continuous and articulated ribbon.

Any line source featuring L-ACOUSTICS^® elements respects the coplanar symmetry and all WST^® criteria on the entire sonic spectrum. This allows an exceptionally coherent sonic signature in very long throw applications, beyond the limits of other systems.

L-ACOUSTICS^® has been designing reference line array systems for more than 15 years.

ARCS® is a WST®-based constant curvature line source and can be incrementally arrayed in the horizontal or vertical planes to match any audience geometry. The system is optimized for medium-throw applications in theatres as a main stereo system or a radial central cluster. Its medium contour allows it to be implemented as a main FOH system in touring applications or as a fill system sonically compatible with large format line sources.

• 50 - 20k Hz

• Horizontal: symmetrical 22.5°
• Vertical: asymmetrical 20° down 40° up

• 128 dB

• LF: 375 W
• HF: 100 W

• LF: 1 x 15" weatherproof loudspeaker (bass reflex-loaded, 3" voice coil), 8 ohms impedance
• HF: 1 x 1.4" compression driver mounted on DOSC waveguide and lens, 8 ohms impedance

• W x H/h x D: 440 x 820 x 652 mm - 17,3 x 32,3 x 25,7 in
• Weight (net): 57 kg - 125.7 lbs
• Connectors: 2x 4-pin Neutrik speakon
• Material: 15mm, 18 mm and 24 mm Baltic birch plywood
• Finish : Maroon-gray
• Grill : Black epoxy perforated steel with acoustically transparent foam
• Rigging : Integrated flying hardware and handles

• Frequency response 63 - 18k Hz (±3 dB)
• Horizontal symmetrical 22.5°
• Vertical asymmetrical 20° down 40° up
• Weight: 57 kg

• Rigging accessory for flying up to 4 ARCS in the horizontal orientation (provided with 6+6 safety
  steels for attachment between all front and rear ARCOUPL shackles, two ARCOUPL, two shackles)

• Flying bumper for rigging an ARCS array. One BUMP3 is required to fly 2 or 4 cabinets.
• Two BUMP3 and one LIFTBAR are required to fly 1, 3, or more than 4 enclosures.

• Amplified Controllers with DSP library
• 2 analog inputs and 4 amplifier channel outputs
• LA4: 4 x 1000 W / LA8: 4 x 1800 W (per channel into 4 ohms)
• Dedicated XT presets
• LA NETWORK MANAGER control software

• Electro-acoustic and mechanical simulation software (Windows® compatible) dedicated to L-ACOUSTICS products.

• 500 seats
• 2 x 3 ARCS FOH

• 980 seats
•  2 x 4 ARCS with ARCBUMP

• 1 200 seats
• 22 ARCS FOH

• 1 200 seats
• 2 x 6 ARCS FOH

• 2 800 seats
• 2 x 2 ARCS FOH

• 1 400 seats
• 2 x 3 ARCS FOH

• 10 000 seats  
• 1 x 6 ARCS central cluster
• 2 x 2 ARCS side fills

• 468 seats
• 2 x 2 ARCS FOH

• 400 seats
• 2 x 2 ARCS FOH

• 500 seats
• 2 x 3 ARCS FOH

• Audience:8 000
• 2 x ARCS central cluster

• Audience: 800 
• 2 x 6 ARCS FOH

• Audience: 2 500
• 2 x 6 ARCS FOH

• Audience: 1 500
• 2 x 3 ARCS FOH

• Audience: 400 
• 2 x 3 ARCS FOH

• Audience: from 3 000 to 8 000 
• 2 x 2 ARCS outfill

• Installation Europe - June 2009