LR24/90 - mid-size line-array module

  • High-performance line-array system for medium to larger applications
  • HiFi sound quality at concert Sound Pressure Levels
  • 12” pro-ribbon HF section with exceptional intelligibility and “throw”
  • Maximum dynamic headroom reserve with lowest possible distortion
  • Fully symmetric and coherent pattern control in horizontal and vertical plane
  • SIS™ pre-wired for very high system damping and further reduced distortion

Product description

The LR24/90 is a 3-way, “mid-size” format line-source sound system; Loaded with Alcons’ multiple-patented pro-ribbon technology for mid and high frequencies, the system features a super-fast impulse response with up-to-90% less distortion. This results in a fully intuitive linear response, with perfect intelligibility and non-compressed identical tonal balance at any SPL.

The all-natural cylindrical wavefront of the purpose-designed RBN1202rs 12” pro-ribbon transducer and the acoustically and electronically symmetrical component configuration bring a unique pattern control in both the vertical as well as the horizontal plane, up to the highest frequencies without any distortion-inducing horn constructions. The ultra-coherent vertical dispersion enables a perfect inter-cabinet coupling for ultimate HF throw and wind-stability.

The remarkable intelligibility and maximum dynamic headroom reserve is due to the RBN1202’s enormous power handling of 2500W and RMS-to-peak ratio of 1:15, from 1 kHz to 20 kHz.

The MF-section features two high-efficiency 6.5” midrange transducers with Neodymium motor-structure, coaxially mounted behind the HF driver in a horn-loaded configuration.

The LF-section delivers a super accurate bass with highest output under lowest distortion possible. The new-generation 12” transducers are fitted with a large, dual-3.5” voice-coil Neodymium motor, enabling a significantly-extended excursion, while maintaining a high sensitivity.

The LR24/90 is driven by the Sentinel amplified loudspeaker controller, optimising the system’s response by system-specific drive processing and feedback for each array configuration, including presets for phase-matched low-frequency extensions.

The Signal Integrity Sensing™ pre-wiring ensures dynamic cable/connector compensation between the LR24 and ALC; This offers a 1:1, undistorted natural sound reproduction, regardless of cable length and amplifier impedance load (system damping factor 10.000).

The rigging system enables angle-setting on the cabinets without lifting the array, resulting in safer and faster set-up with minimal handling. The unique, patent-pending flying system facilitates both compressed and non-compressed suspension. It has a WLL of 24 cabinets under 10:1 safety.

The LR24 is available with a 90° (LR24/90) or 120° (LR24/120) horizontal dispersion.

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Dimensional drawing

Technical specifications

Frequency response 58 Hz - 20.000 Hz (+/- 3 dB)
  46 Hz - (+/-10 dB)
Sensitivity nominal 109 dB (200 Hz – 10 kHz)
Nominal impedance LF 8 ohms, MF 8 ohms
Recommended drive Sentinel10, max. 2 pcs. per channel (4 ohms)
Nominal SPL peak 142 dB (Sentinel10 200 Hz - 10 kHz)
Dispersion H x V (array) 90° x depending on array length
Dispersion H x V (single) 90° x 8° (@ 10 kHz)

Physical specifications

System 3-way, full-range
Filtering 2-way active, 2-way passive
Drivers LF 2x AW12.352ND-16 12”, vented
Drivers MF 2x AM65ND-16 6.5”, sealed
Drivers HF 1x RBN1202rs 12” pro-ribbon driver
Connectors 2x Speakon NL8 input/link
Physical dimensions  mm                 inches
Height 354                  13.9
Width 950                  37.4
Depth 447                  17.6
Weight  45 kg               99,2 lb
Warranty 6 years limited


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