LR28/110 - Larger-format line-array module

  • Ultra-high-performance line-array system for medium to large applications
  • HiFi sound quality at concert Sound Pressure Levels
  • 14” pro-ribbon HF section with exceptional intelligibility and “throw”
  • Maximum dynamic headroom reserve with lowest distortion
  • Wide horizontal dispersion for extended coverage from lower array section
  • SIS™ pre-wired for very high damping and further reduced distortion

Product description

The LR28/110 is a 3-way, “larger-format” line-source sound system, to be used as vertical array, in medium to large applications with extended horizontal coverage.

The LR28/110 combines the highest sound quality possible with very high SPL capabilities and throw. It offers a fully predictable linear response behavior, with perfect intelligibility and identical tonal balance at any SPL. By implementing Alcons’ pro-ribbon technology for mid and high frequencies, a super-fast impulse response with up-to-90% less distortion under lowest power-compression is achieved.

The all-natural cylindrical wavefront of the multiple-patented, purpose-designed RBN1402rsr pro-ribbon transducer enables a precise pattern control, without any distortion-inducing horn constructions. The patented 110-degree horizontal dispersion is maintained up to the highest frequencies; The HF peak power handling of 3000W and RMS-to-peak ratio of 1:15, caters for a superb intelligibility and throw with maximum dynamic headroom reserve.

The MF-section features 4 high-efficiency 6.5” midrange transducers with Neodymium motor-structure in a slot-loaded configuration.
The mid section and RBN high section are jointly mounted in/on the aluminium cassette for optimized heat-dissipation/reduced power-compression and prolonged system output.

The LF section consist of 2 reflex-loaded, custom 14” woofers with reinforced cone and large voice-coil Neodymium motor-structure for improved heat dissipation to reduce power compression.

The LR28/110 is powered and controlled by 4 channels of the Sentinel10 amplified loudspeaker controller; Through the integrated processing and feedback, the ALC offers LR28-specific drive processing with array-compensation, filter-presets, system eq, phase-matching, a.o.

The Signal Integrity Sensing™ pre-wiring of the LF and MF sections ensures dynamic cable/connector compensation between the LR28/110 and Sentinel, resulting in a fast and tight mid and bass response, while reducing distortion even further (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 flying system supports different ways of array assembling and has a WLL of 24 cabinets under 10:1 safety.

Dimensional drawing

Technical specifications

Frequency response 50 Hz – 20.000 Hz (+/- 3 dB)
37 Hz - (+/- 10 dB)
Sensitivity nominal 108 dB (200 Hz – 10 kHz)
Nominal impedance LF 2x 8 ohms, MF 8 ohms, HF 8 ohms
Recommended drive ALC Sentinel10
Nominal SPL peak 142 dB (Sentinel10 200 Hz – 10 kHz)
Dispersion H x V (array) 110° x depending on array length
Dispersion H x V (single)    110° x 6° (@ 10 kHz)

Physical specifications

System 4-way, full-range
Filtering 3-way active
Drivers LF 2x AW14.35ND-8 14”, vented
Drivers MF    4x AM65ND-8 6.5”, vented
Drivers HF 1x RBN1402rsr 14” pro-ribbon driver
Connectors 2x 14-pin CaCom: input / link
Physical dimensions     
Height 404 mm / 15,8 inch
Width 1200 mm / 47,2 inch
Depth 538 mm / 21,1 inch
Weight (approx.) 63 kg / 138.9lb
Warranty 6 years limited

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