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L-Acoustic

L-Acoustic ARCS II Loudspeaker

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ARCS II features one 15-inch neodymium LF driver in a bass-reflex tuned enclosure and one 3-inch neodymium diaphragm compression driver coupled to a DOSC waveguide. It is based on an active 2-way design with a nominal impedance of 8 ohms for both the HF and the LF section. The ARCS II cabinet is made of first grade baltic birch plywood to ensure maximum acoustical and mechanical integrity. It operates over the 50Hz to 20kHz nominal frequency bandwidth. This response can be lowered down to 25Hz with the addition of the SB28 subwoofer.

View Product Features

  • Optimized for medium-throw applications
  • Adaptive and predictable directivity to suit many audience geometries
  • FOH system, fills and distributed designs for touring or fixed installation
  • Clarity, intelligibility, impact and precision for live music
  • LA8 advanced system drive and protection
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About the L-Acoustic ARCS II Loudspeaker

The L-Acoustic ARCS II is a versatile, trapezoidal loudspeaker system designed for precise, wide-coverage sound reinforcement in both permanent installation and touring applications. As a successor to the original ARCS, this two-way, passive design incorporates significant advancements in transducer technology and enclosure design to deliver enhanced output, clarity, and directivity control. It utilizes a high-performance 15-inch low-frequency driver paired with a 3-inch voice coil compression driver, managed by a passive crossover network that ensures seamless acoustic integration. The cabinet's defining characteristic is its unique shape, engineered to allow multiple enclosures to be arrayed horizontally or vertically, creating a continuous curved wavefront with consistent coverage across a broad listening area.

The system's name, ARCS (Architectural Radial Curved System), reflects its primary strength: the ability to form acoustically coherent arrays with predictable horizontal dispersion. When multiple cabinets are combined, they function as a single, large acoustic source with a smooth, fan-shaped coverage pattern, minimizing lobing and comb-filtering effects. This makes the ARCS II particularly well-suited for covering wide or complex spaces such as theaters, auditoriums, houses of worship, and outdoor venues where even sound distribution is critical. The waveguide-loaded high-frequency driver provides precise pattern control, ensuring consistent tonal balance throughout the coverage zone while maximizing directivity and reducing energy wasted on ceilings and walls.

Constructed from multi-ply birch plywood with a durable, textured exterior finish, the ARCS II is built for long-term reliability. The cabinet features integrated rigging points that enable secure and precise mechanical coupling for flown arrays, as well as options for ground-stacking or pole-mounting. Input is handled via dual Neutrik SpeakON NL4 connectors for flexible system wiring. When paired with appropriate L-Acoustic amplification and system processing, such as the LA4X or LA12X amplified controllers, the ARCS II becomes a fully optimized component of a larger, scalable sound system, renowned for its sonic accuracy, high output capability, and exceptional pattern control for intelligible, impactful audio reproduction.

Key Features

  • Optimized for medium-throw applications
  • Adaptive and predictable directivity to suit many audience geometries
  • FOH system, fills and distributed designs for touring or fixed installation
  • Clarity, intelligibility, impact and precision for live music
  • LA8 advanced system drive and protection

L-Acoustic ARCS II Loudspeaker Specs

Driver Configuration
LF Driver Size
15 inches
HF Driver
3-inch voice coil compression driver
System Type
Passive 2-Way
Power Handling
Continuous Power
600 Watts
Program Power
1200 Watts
Peak Power
2400 Watts
Nominal Impedance
8 Ohms
Performance
Maximum SPL
139 dB
Frequency Response
55 Hz - 18 kHz
Crossover Frequency
1.3 kHz
Dispersion & Array
Horizontal Dispersion
100 degrees (array dependent)
Array Capability
Horizontal & Vertical Curved Arrays
Physical Specifications
Enclosure Material
Birch Plywood
Rigging
Integrated Array Hardware
Input Connectors
Dual SpeakON NL4

Key Features

  • Optimized for medium-throw applications
  • Adaptive and predictable directivity to suit many audience geometries
  • FOH system, fills and distributed designs for touring or fixed installation
  • Clarity, intelligibility, impact and precision for live music
  • LA8 advanced system drive and protection
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