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L’acoustics 115XT HiQ Coaxial Stage Monitor


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Limited warranty

Pre-Owned L'acoustics 115XT HiQ monitors are in very good condition-


L’acoustics 115XT HiQ enclosure is a top tool for the monitor engineer, especially for high SPL applications. Combining the advantages of coaxial technology with the pattern control of conical waveguide loading, the 115XT HiQ is also suitable for use in distributed sound reinforcement applications due to its flexible format and advanced rigging accessories.


    • High power and sonic performance, clarity and precision
    • Exceptional rider friendliness
    • Tight coverage pattern and exceptional immunity to feedback
    • Dual wedge shape for short or long-throw floor monitoring
    • Low cabinet profile for discrete TV stage presence
    • Sturdy design and construction for extended longevity
    • LA8 advanced system drive and protection

The 115XT HiQ combines high SPL output capability with clarity, fidelity and pattern control. The combination of the weatherproof, 15-inch loudspeaker (bass reflex-loaded, 3-inch voice coil) and the 1.4-inch Neodymium compression driver in a coaxial assembly results in top-notch power response stability with high immunity to feedback. Conical waveguide loading focuses mid-/high-frequency energy over a 45-degree axi-symmetrical pattern while, at the same time, loading the 15-inch loudspeaker for improved upper-mid-bass efficiency. The control and amplification of the 115XT HiQ is managed by the L'acoustics LA8 platform. The active DSP filtering encompasses advanced crossover functions, system EQ, HF and LF transducer time alignment, and dual protection of the transducers (PEAK and RMS). The L'acoustics LA8 amplified controller offers the following drive modes:


    • ‘‘FULL RANGE’’ mode for 115XT HiQ standalone use at nominal bandwidth ([HIQ_FR], [HIQ_FI] and [HIQ_MO] presets)
    • ‘‘HIGH-PASS’’ mode with 100 Hz high-pass filter to possibly associate the complementary SB18 subwoofer ([HIQ_FR_100], [HIQ_FI_100] and [HIQ_MO_100] presets)

For each mode a distinction is drawn between [FRONT], [FILL] and [MONITOR] presets as they respectively match front of house, distributed applications and half-space loading operating conditions. The performances of the 115XT HiQ enclosure depend upon the choice of preset and physical system configuration.

115XT HiQ Data


50 Hz - 20 kHz ([HiQ_FR] preset)


50° Axi-symmetric


139.5 dB ([HiQ_MO] preset)

136.5 dB ([HiQ_FI] preset)


LF: 1 x 15’’ weather-resistant transducer

HF: 1 x 3’’ diaphragm compression driver

Nominal impedance: 2 x 8 ohms


LF : 450 W ([HiQ_FI] preset)

HF : 125 W ([HiQ_FI] preset)


H x W x D: 365 x 580 x 440 mm - 14.4 x 22.8 x 17.3 in

Wedge angle: 30° or 60° from vertical

Weight (net): 28.5 kg - 62.8 lbs.

Connectors: 2 x 4-point Speakon®

Material: 18, 24 and 30 mm Baltic birch plywood

Finish: Grey-brown RAL 8019®

Front: polyester powder-coated steel grill, Airnet® acoustically neutral fabric

Rigging: integrated handles and pole mount socket, optional ETR15 bracket and XTLIFTBAR accessory

1 Peak level measured at 1m under half space conditions using 10 dB crest factor pink noise with specified preset and corresponding EQ settings.

2 Installation guidelines are specified in SOUNDVISION software designed to help with L-ACOUSTICS® product implementation.


Product Videos

L-Acoustics X Series 02:29

Meet the most advanced coaxials on the market. A guided tour, in just 2 minutes, of the brand new X Series from L-Acoustics. The new X Series responds to the demands of the industry’s top sound designers. Improvements include high-excursion neodymium drivers, ellipsoid directivity, laminar vented ports and up to 30% weight reduction. Used as a stage monitor, the X Series offers low latency monitor presets and a 7% lower profile. In installation applications the X Series comes with a complete range of flexible rigging accessories and a RAL custom color program. With improved radiation control and low frequency performance, the X Series is a true point-source system, boasting pristine sound for short throw applications. “The challenge in creating the X Series was to bring all of the experience we gained in designing the K2 to bear on a new series of reference coaxials,” explains Christophe Combet, head of acoustic and instrumentation at L-Acoustics. "We optimized the design, ergonomics, acoustical performance and weight. We used new carpentry techniques to optimize internal volumes, maximize bass and eliminate vibrations, designing a new, aerodynamic form with a slender, low profile that gives a profound feeling of power.” Live Monitor The X8 is the live monitor of the X series. X8 delivers pristine sound with the L-Acoustics signature, a high SPL and extended bandwidth for operation at FOH position or in control rooms. Its wide conical directivity pattern imparts a sense of spatialization, with no minimum listening distance. Multi-purpose The X12 can cover multiple applications in rental and installation. An ellipsoid directivity of 90° x 60° makes it adaptable to FOH application. The X12 comes with a complete range of rigging accessories and RAL color program for maximum application versatility and seamless integration. Low weight and optimized ergonomics for easy handling and a passive design for effective amplified controller management. Reference Stage Monitor The X15 is the powerhouse of the series, with exceptional power in beamwidth and acoustic isolation. Its narrow, 40° x 60° directivity gives it immunity to feedback, making it perfect for the stage. Low in profile, light in weight, rugged in build, the X15 boasts integrated risers allowing it to go from 35° to 55° for maximum versatility. “The X Series is the result of an intense R&D process, fully based on feedback from the professionals of the industry and from our own field experience,” continues Combet. “We look forward to working with our installation and rental partners worldwide on the launch later this year. X Series comes as an addition to the ultra-compact fill 5XT launched in 2013.

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