L-Acoustics K2 Line Array

L-Acoustics K2 Line Array

The L-Acoustics K2 Line Array is a high-performance professional loudspeaker designed for demanding large-scale sound reinforcement applications. Developed as part of the L-Acoustics K Series, K2 combines powerful output, extended bandwidth, flexible horizontal directivity and an integrated rigging system in a relatively lightweight enclosure. It is designed for professional touring, festivals, concerts, sporting events and other applications where consistent coverage, high output and system flexibility are essential.

The L-Acoustics K2 is a 3-way active WST enclosure featuring two 12-inch low-frequency cone drivers, four 6.5-inch mid-frequency cone drivers and two 3-inch diaphragm compression drivers. The enclosure uses L-Acoustics technologies including DOSC waveguide technology, Panflex adjustable horizontal directivity and L-Vents for the low-frequency section. According to L-Acoustics, the K2 provides a usable bandwidth of 35 Hz to 20 kHz and a maximum SPL of 147 dB when operated with the specified preset.

Designed as a quad-amplified system, the K2 can be operated with compatible L-Acoustics amplified controllers including the LA4X, LA8 and LA12X. This approach allows the loudspeaker’s individual transducer sections to be controlled and amplified as part of a properly configured L-Acoustics system. For professional deployments, system configuration, presets, amplification and rigging should always follow the manufacturer’s documentation and application requirements.

L-Acoustics K2 Line Array for Professional Sound Reinforcement

The L-Acoustics K2 Line Array was designed for applications where a conventional point-source loudspeaker cannot provide the required coverage, throw or acoustic consistency. Its line source architecture allows multiple K2 elements to be assembled into an array, with the vertical behavior of the resulting system determined by the number of elements and the curvature of the array.

This makes the K2 particularly relevant for professional touring companies, concert production companies, rental companies, festivals, corporate events, sporting venues and large entertainment productions.

A properly designed K2 array can provide controlled coverage across a large audience area while maintaining the high output and sonic performance expected from a professional touring loudspeaker system. The enclosure’s adjustable horizontal directivity further increases its flexibility because operators can select different horizontal coverage patterns according to the requirements of the venue and system design.

The K2 provides 70° or 110° symmetric horizontal directivity and 90° asymmetric horizontal directivity options. The asymmetric configuration can provide 35°/55° or 55°/35° coverage, allowing system designers to adapt the loudspeaker’s horizontal dispersion to the shape of the audience area.

This flexibility is particularly useful when the audience area does not have a symmetrical geometry. Rather than relying on a single fixed horizontal dispersion pattern, Panflex allows the K2 enclosure to be configured for different coverage requirements.

Three-Way Active WST Design

The K2 is a 3-way active Wavefront Sculpture Technology, or WST, enclosure. Its transducer configuration consists of two 12-inch cone drivers for low frequencies, four 6.5-inch cone drivers for mid frequencies and two 3-inch diaphragm compression drivers for high frequencies.

The separation of the acoustic spectrum across these transducer sections is an important part of the K2 system architecture. The low-frequency section provides substantial acoustic output, while the mid-frequency and high-frequency sections reproduce the critical vocal, musical and high-frequency information required in professional sound reinforcement.

The K2 is designed to operate as a quad-amplified enclosure. This means that its transducer sections are controlled through the L-Acoustics amplification and processing ecosystem rather than being treated as a simple passive loudspeaker.

For professional system operators, this provides a structured approach to loudspeaker management, system optimization and protection. Compatible L-Acoustics amplified controllers include the LA4X, LA8 and LA12X, with the appropriate configuration and presets determined by the system design and manufacturer’s documentation.

35 Hz to 20 kHz Usable Bandwidth

One of the defining specifications of the L-Acoustics K2 Line Array is its usable bandwidth. L-Acoustics specifies the K2 at 35 Hz to 20 kHz (-10 dB) using the K2 70 configuration.

This broad frequency range allows the K2 to reproduce a substantial portion of the audible spectrum from a single line source enclosure. It is therefore capable of handling much of the program material required for live music, concerts, festivals and professional event production.

However, large-scale sound systems are frequently configured with dedicated subwoofers when additional low-frequency extension, headroom or low-frequency impact is required. The K2 can therefore form part of a larger L-Acoustics system rather than necessarily being used as a standalone full-range solution.

The exact low-frequency performance of a complete system depends on the overall configuration, amplification, presets, array design and any additional subwoofer system used with the K2.

147 dB Maximum SPL

The L-Acoustics K2 is specified with a maximum SPL of 147 dB under the manufacturer’s stated measurement conditions and preset configuration.

This high maximum SPL capability is one of the reasons the K2 is designed for large-scale professional applications. High-output loudspeakers are required when sound must reach large audience areas while maintaining appropriate levels of clarity and headroom.

Maximum SPL specifications should always be interpreted according to the measurement conditions supplied by the manufacturer. The K2’s published 147 dB figure is a peak level measured at 1 meter under free-field conditions using pink noise with a crest factor of 4 and the specified preset.

Real-world system performance depends on numerous variables, including the number of enclosures, array configuration, audience distance, environmental conditions, acoustics, amplification, processing and system deployment.

Panflex Adjustable Horizontal Directivity

One of the most useful features of the K2 is Panflex technology. The system allows a single K2 enclosure to provide multiple horizontal directivity patterns.

The available horizontal patterns include 70° symmetric, 110° symmetric and 90° asymmetric configurations. The asymmetric 90° configuration can be set to 35°/55° or 55°/35°.

This gives sound system designers additional control over how acoustic energy is distributed across the audience.

For example, a wide 110° pattern may be useful when broad horizontal coverage is required, while a narrower 70° pattern can be selected where greater concentration of acoustic energy is appropriate. The asymmetric option can be particularly useful for audience areas where the coverage requirement differs on either side of the loudspeaker.

This level of directivity control is valuable in professional sound reinforcement because the objective is not simply to produce high SPL. A well-designed system must distribute sound appropriately across the intended listening area.

DOSC Waveguide Technology

The high-frequency section of the K2 incorporates a DOSC waveguide. L-Acoustics developed DOSC technology as part of its approach to wavefront control in line source systems.

The K2 uses two 3-inch diaphragm compression drivers for its high-frequency section. The high-frequency section works together with the enclosure’s line source architecture and array geometry to provide controlled acoustic behavior.

For live music and event production, controlled high-frequency reproduction is particularly important for vocals, instruments, cymbals, speech intelligibility and other program material containing significant high-frequency information.

The K2’s acoustic design is intended to work as part of a complete L-Acoustics system rather than as an isolated generic loudspeaker.

L-Vents for Low-Frequency Performance

The low-frequency section of the K2 uses two 12-inch cone drivers and L-Vents. L-Acoustics describes L-Vents as part of the K2’s low-frequency acoustic architecture.

The vented low-frequency design contributes to the enclosure’s ability to reproduce low-frequency content while maintaining the physical format required for a large-format touring line source.

The K2’s published usable bandwidth extends down to 35 Hz under the specified measurement and preset conditions. For productions requiring substantially greater low-frequency energy, K2 arrays are commonly integrated into a larger system design that includes appropriate subwoofers.

This system-based approach allows the main line source to focus on delivering controlled broadband coverage while dedicated low-frequency enclosures provide additional bass output where required.

Lightweight Design for a Large-Format Line Array

Although the K2 is a large-format professional loudspeaker, L-Acoustics specifies a net weight of 56 kg, or approximately 123.2 lb, per enclosure.

Weight is an important consideration for touring systems because large arrays may contain multiple enclosures. Equipment that provides high acoustic output while maintaining manageable enclosure weight can simplify transportation, handling and deployment.

The K2 enclosure measures approximately 1338 mm wide, 400 mm high and 354 mm deep according to the manufacturer’s product specification documentation.

The enclosure incorporates two large side handles and an integrated captive rigging system designed for professional deployment.

Integrated Four-Point Rigging System

The L-Acoustics K2 incorporates a four-point captive rigging system. The rigging system is integrated into the enclosure and is designed to facilitate array assembly and deployment.

Supported inter-enclosure angles include:

* 0.25°
* 1°
* 2°
* 3°
* 4°
* 5°
* 7.5°
* 10°

These angle options allow the vertical curvature of an array to be adjusted according to the required audience coverage.

Array curvature is a critical part of line source system design. The appropriate angles depend on the number of elements, venue geometry, audience distances and desired coverage. The K2 should therefore be deployed according to L-Acoustics’ rigging, safety and system design documentation.

The integrated rigging system also contributes to efficient touring workflows by reducing the need for loose external rigging components during normal array assembly.

Rugged Construction for Touring

Professional touring loudspeakers must withstand repeated transportation, handling and deployment. The K2 uses a premium-grade Baltic birch plywood cabinet with die-cast aluminum side panels.

The front of the enclosure is protected by a coated steel grille and acoustically neutral 3D fabric.

The rigging components use high-grade steel with an anti-corrosion coating.

These construction details reflect the requirements of professional rental and touring environments, where loudspeakers may be loaded into trucks, transported between venues and repeatedly assembled and disassembled.

The K2’s enclosure finish is specified by L-Acoustics as dark grey brown, Pantone 426 C.

The K2 also carries an IP55 rating. Users should consult the manufacturer’s documentation for the applicable conditions, limitations and requirements concerning weather exposure and protection.

L-Acoustics K2 for Concerts and Festivals

The L-Acoustics K2 Line Array is designed for large-scale sound reinforcement and is well suited to concert and festival applications where controlled long-range coverage is required.

Concert environments can present significant challenges for sound system designers. Audience areas may extend from directly in front of the stage to substantial distances away from the main system. A line source configuration allows the system designer to create an array whose vertical behavior is determined by the number of enclosures and the selected inter-element angles.

The K2’s adjustable horizontal directivity provides additional flexibility when designing coverage for different audience layouts.

For touring productions, this flexibility can be especially valuable because the system may need to be adapted to different venues without changing the fundamental loudspeaker platform.

L-Acoustics K2 for Touring Companies

Touring companies require equipment that can deliver repeatable performance while remaining practical to transport and deploy. The K2 was developed with large-scale touring applications in mind.

Its combination of output, bandwidth, directivity control, integrated rigging and manageable enclosure weight makes it appropriate for professional touring systems.

The K2 can be deployed in arrays of different sizes depending on the requirements of the production. Smaller configurations can be used where appropriate, while larger arrays can be designed for greater audience coverage.

System size should always be determined by qualified system designers based on the venue, required coverage, SPL targets, environmental conditions and other production requirements.

L-Acoustics K2 for Rental Companies

For professional audio rental companies, flexibility is an important consideration when selecting inventory.

A K2 inventory can support different types of events, including concerts, festivals, corporate productions, sporting events and other large-scale productions.

Because the K2 is part of the wider L-Acoustics ecosystem, rental companies can build complete systems around compatible L-Acoustics loudspeakers, subwoofers, amplification, rigging and transportation accessories.

The K2 can therefore serve as a central component in a larger professional sound reinforcement inventory.

Amplification and Processing

The K2 is a quad-amplified loudspeaker. L-Acoustics specifies compatible amplification through its LA4X, LA8 and LA12X amplified controllers.

Correct amplification and processing are essential to achieving the intended performance of the system.

Users should not treat the K2 as a conventional passive loudspeaker and connect it to arbitrary amplification without reference to the manufacturer’s system documentation.

The appropriate amplifier, preset and system configuration depend on the deployment.

L-Acoustics provides dedicated documentation for K2 configurations, presets and amplification references through its official documentation center.

For professional installations and touring applications, system operators should use the appropriate L-Acoustics presets and follow the manufacturer’s recommendations.

System Design and Array Configuration

The performance of any line array depends on more than the specification of a single enclosure.

The number of K2 elements, array height, inter-element angles, horizontal directivity, audience geometry, amplifier configuration and processing all influence the resulting system performance.

The K2’s vertical directivity is dependent on the number of elements in the array and the curvature selected between enclosures.

This means that the K2 should be evaluated as part of a complete sound system rather than simply as an individual speaker.

Professional system design software and L-Acoustics system tools can be used to model coverage and determine appropriate configurations for specific venues.

For installations or touring productions, proper prediction and measurement can help optimize coverage and system consistency.

K2 and Subwoofer Integration

Although the K2 provides usable bandwidth down to 35 Hz under its specified configuration, large-scale productions may require additional subwoofers.

Subwoofers can provide additional low-frequency output and headroom for music genres and productions where powerful low-frequency reproduction is a major requirement.

The appropriate subwoofer configuration depends on the overall system design. L-Acoustics offers a range of dedicated low-frequency systems that can be integrated with professional K Series deployments.

When selecting a subwoofer system, factors such as required SPL, audience size, low-frequency extension, deployment position and cardioid or directional requirements should be considered.

The result should be a balanced system in which the K2 main arrays and low-frequency system work together rather than competing for the same acoustic role.

Applications for the L-Acoustics K2 Line Array

The K2 is designed for professional applications including:

* Large concerts
* Touring productions
* Music festivals
* Outdoor events
* Sporting events
* Large corporate events
* Professional rental companies
* Live entertainment venues
* Large-scale temporary installations
* Touring sound reinforcement
* Festival main stages
* Arena and large venue sound systems

The appropriate number of K2 enclosures and supporting equipment depends on the specific application.

Key L-Acoustics K2 Specifications

The main technical specifications of the K2 include:

Product type: 3-way active full-range WST enclosure

Frequency range: 35 Hz–20 kHz (-10 dB) with the specified K2 70 configuration

Maximum SPL: 147 dB

Low-frequency section: 2 × 12-inch cone drivers

Mid-frequency section: 4 × 6.5-inch cone drivers

High-frequency section: 2 × 3-inch diaphragm compression drivers

Horizontal directivity: 70° symmetric, 110° symmetric or 90° asymmetric

Vertical directivity: Dependent on array configuration and curvature

Amplification: Quad-amplified

Compatible amplified controllers: LA4X, LA8 and LA12X

Rigging: Four-point captive rigging system

Inter-enclosure angles: 0.25°, 1°, 2°, 3°, 4°, 5°, 7.5° and 10°

Weight: 56 kg / 123.2 lb

Cabinet: Premium-grade Baltic birch plywood

Front grille: Coated steel grille with acoustically neutral 3D fabric

Protection rating: IP55

Finish: Dark grey brown Pantone 426 C

Connectors: 2 × 8-point PA-COM

These specifications are based on L-Acoustics’ published K2 product documentation. (L-Acoustics)

Why Choose the L-Acoustics K2?

The L-Acoustics K2 combines several features that are important in professional sound reinforcement.

Its three-way architecture provides dedicated transducers for low, mid and high-frequency reproduction. Its WST line source design allows multiple enclosures to be combined into arrays for large-scale coverage. Panflex provides adjustable horizontal directivity, while the integrated rigging system allows the vertical curvature of the array to be configured according to the application.

The combination of high maximum SPL, wide usable bandwidth, directivity control and professional touring construction makes K2 a versatile platform for demanding sound reinforcement applications.

For companies operating professional audio systems, the K2 can also be integrated into a wider L-Acoustics workflow involving compatible amplification, processing, rigging and system design tools.

Buying an L-Acoustics K2 Line Array

When purchasing an L-Acoustics K2 Line Array, buyers should consider more than the enclosure itself.

The condition of the loudspeaker, transducer condition, grille and cabinet condition, rigging components, connectors and included accessories can all be important factors when evaluating a used or pre-owned K2.

For professional deployments, buyers should also consider whether the required amplification, rigging and accessories are included with the package.

If you are building a complete K2 system, the required number of enclosures, amplifier channels, cabling, rigging hardware, transportation accessories and subwoofers should be determined based on the intended application.

At Bsound Pro Audio, customers can contact our team to discuss available L-Acoustics K2 inventory, quantities, condition, system packages and shipping options.

For enquiries, please visit our contact page and provide the quantity required, delivery location and any additional equipment needed for your system.

L-Acoustics K2 Line Array for Sale

If you are looking for an L-Acoustics K2 Line Array for a professional touring system, rental inventory or large-scale event production, availability can vary depending on stock and configuration.

We recommend contacting Bsound Pro Audio directly for current availability, pricing, condition and package options.

When requesting a quotation, include the number of K2 enclosures you require and your destination. If you are interested in a complete system, you can also specify your preferred amplification, subwoofers, rigging equipment and cabling requirements.

This allows the system to be evaluated as a complete package rather than as individual loudspeaker cabinets.

Professional L-Acoustics K2 System Solutions

A professional K2 deployment can include much more than the main loudspeakers.

Depending on the application, a complete system may include K2 line source enclosures, compatible L-Acoustics amplified controllers, subwoofers, rigging frames, rigging accessories, speaker cables, transportation equipment and system processing.

The exact configuration should be designed around the venue and production requirements.

For large touring productions, system consistency is especially important. Every part of the system needs to work together, from the physical deployment and rigging through to amplification, processing and acoustic coverage.

The K2’s integrated design allows it to be used as part of this broader professional workflow.

Professional Audio Performance and Reliability

The K2 was engineered for professional environments where loudspeakers may be transported frequently and operated at high output levels.

Its Baltic birch plywood cabinet, coated steel grille, high-grade steel rigging components and integrated handling features are intended to support the requirements of professional sound reinforcement.

The IP55 rating also provides a defined level of ingress protection, subject to the manufacturer’s stated conditions and limitations.

As with all professional loudspeaker systems, correct transportation, handling, storage, rigging and operation remain essential to maintaining equipment condition and safety.

Final Overview

The L-Acoustics K2 Line Array is a professional 3-way active WST loudspeaker designed for large-scale sound reinforcement. With two 12-inch low-frequency drivers, four 6.5-inch mid-frequency drivers and two 3-inch compression drivers, the K2 provides a broad 35 Hz–20 kHz usable bandwidth and a published maximum SPL of 147 dB under the manufacturer’s specified conditions.

Its Panflex system provides multiple horizontal directivity options, including 70° and 110° symmetric coverage and 90° asymmetric coverage. The integrated four-point rigging system supports a range of inter-enclosure angles, allowing K2 arrays to be configured for different audience geometries.

With a net weight of 56 kg, Baltic birch plywood construction, integrated rigging and compatibility with L-Acoustics amplification platforms, the K2 is designed to meet the requirements of professional touring and large-scale event production.

Whether you are expanding a professional rental inventory, building a touring system, upgrading an existing concert rig or sourcing individual K2 enclosures, the L-Acoustics K2 provides a flexible platform for high-output professional sound reinforcement.

For current availability, pricing, quantities and shipping information, contact Bsound Pro Audio through our contact page. Provide your required quantity, destination and any additional equipment you need, and our team can assist with your enquiry.

Important: Product specifications, configurations, presets and system requirements can change. Always verify the latest L-Acoustics documentation before installation, rigging or system deployment.