HK Audio L3 115 FA - 15” Active PA Speaker with DSP and FIR Crossover

HK Audio LINEAR 3 L3 115 FA – 15” Active PA Speaker with DSP and FIR Crossover

The HK Audio L3 115 FA is a compact , self-powered, 2-way full-range system that combines a 15” woofer and 1” driver with an internal digital processor to deliver powerful, balanced and easily adjustable live sound. Its 16mm MDF enclosure with a trapezoidal design reduces resonances and provides the robustness necessary for professional use. With 1200W bi-amplified Class D amplification , a maximum SPL of 135 dB (peak) and a frequency response of 58 Hz – 16 kHz (±3 dB) / 49 Hz – 18 kHz (-10 dB) , it is a versatile box for portable sound reinforcement, live music, DJ sets and corporate events. Its 90° × 55° waveguide (constant directivity) and 2.3 kHz X-Over FIR with 72 dB/oct slope ensure precise transitions between paths and homogeneous coverage.

The DSP optimization system allows quick access to practical presets via two EQ switches with Bass Boost / Flat (LF) and Flat / Contour (MHF) options, making it easy to adapt to different playing styles, venues and positions. Connectivity is wide and simple: 2 XLR mic / line combo inputs , 1 stereo RCA input , 2 XLR Thru outputs (including 1 Mix output ), plus +4 dBu input sensitivity with gain control on the center click. In terms of protection and reliability, it integrates a complete active circuit: undervoltage, thermal protection, short circuit, overload , subsonic filter, peak limiter, RMS and multiband , plus look-ahead temperature control for stability over long sessions.

Ready to operate as a standalone speaker or in combination with LINEAR SUB series subwoofers, it features a 3°/7° Duo Tilt plinth for directing the beam towards the audience when using a boom pole, four M8 mounting points , and two carrying handles . The metal grille with acoustic foam protects the components and provides a clean aesthetic. Measuring 44 x 69 x 44.5 cm and weighing 27.9 kg , the L3 115 FA offers a power-to-size ratio that suits both mobile and fixed installations.

Main features

• Active 2-way full-range system with 15” woofer (LF) and 1” compression driver (HF).
• Integrated digital processing (DSP) with response optimization and FIR crossover at 2.3 kHz (72 dB/oct).
• 1200W bi-amped Class D amplification for punch and efficiency.
• Max SPL 135 dB (peak) for coverage with dynamic range.
• 90° × 55° coverage using constant directivity diffuser.
• Frequency response: 58 Hz – 16 kHz (±3 dB) / 49 Hz – 18 kHz (-10 dB).
• EQ by presets: Bass Boost / Flat (LF) and Flat / Contour (MHF).
• Connections: 2 × XLR combo mic/line, 1 × stereo RCA input, 2 × XLR Thru (1 × Mix output).
• Advanced protections: undervoltage, thermal, short circuit, overload, subsonic, peak/RMS/multiband limiters and look-ahead .
• Enclosure: 16mm MDF, trapezoidal design with metal grille and black acoustic foam.
• Mounting: Duo Tilt 3°/7° socket and 4 × M8 for installation; 2 integrated handles.
• Dimensions and weight: 44 × 69 × 44.5 cm; 27.9 kg.

Product benefits

• Powerful, controlled sound: The FIR crossover and 90° × 55° guide ensure vocal clarity and defined transients throughout the listening area.
• Instant versatility: Bass Boost and Contour presets to suit DJ, live band, or vocal reinforcement without the need for external processors.
• Professional reliability: A complete package of electronic protections that maintains stable performance on long tours and long days.
• Easy subwoofer integration: Designed to combine with the LINEAR SUB series to create 2.1 systems or larger arrays.
• Quick and adjustable mounting: Duo Tilt allows the beam to be aimed at the audience, improving coverage and reducing early reflections.

Use cases

• Portable PA reinforcement for corporate events, rentals, and technical production.
• Backline for live music (bands, acoustics, music schools and rehearsals).
• Mobile and club DJs requiring consistent pressure and clear vocals.
• Fixed installations in bars, multipurpose rooms and places of worship.

Frequently Asked Questions

• Can I use it alone or with a subwoofer? Yes. It works as a standalone full-range speaker or in combination with LINEAR SUB subwoofers to extend low-frequency range.
• How do I quickly adjust the tone? Use the EQ switches: Bass Boost/Flat (LF) and Flat/Contour (MHF) to suit the venue or musical style.
• Is it suitable for installations? Yes. It has four M8 mounting points and a 3°/7° Duo Tilt socket for flexible mounting.
• What input level does it support? Input sensitivity of +4 dBu with the gain control on the center click.

Description for projects

2-way full-range active loudspeaker with 15” woofer and 1” driver, internal DSP with FIR X-Over at 2.3 kHz (72 dB/oct), 90° × 55° coverage, response 58 Hz – 16 kHz (±3 dB) / 49 Hz – 18 kHz (-10 dB), bi-amplified Class D amplification 1200 W, max SPL. 135 dB (peak), EQ presets (Bass Boost/Flat on LF and Flat/Contour on MHF), 2 × XLR combo mic/line + 1 × stereo RCA inputs, 2 × XLR Thru (1 × Mix) inputs, sensitivity +4 dBu, protections (undervoltage, thermal, short circuit, overload, subsonic, peak/RMS/multiband and look-ahead limiters), 16 mm MDF enclosure, Duo Tilt 3°/7° socket, 4 × M8, 2 handles, metal grille with foam; dimensions 44 × 69 × 44.5 cm, weight 27.9 kg.