technical specifications LR18/120i
general•High-performance line-array system for small tomedium installations•

HiFi sound quality at concert Sound PressureLevels•

7” pro-ribbon HF section with exceptional
intelligibility and “throw”•

Maximum dynamic headroom reserve withlowest possible distortion•

Fully symmetric and coherent pattern control inhorizontal and vertical plane•

SIS™ pre-wired for very high system damping
and further reduced distortion

description
The LR18/120i is a 3-way, compact format line-arraysound system, combining the highest sound quality
possible with very high SPL capabilities and throw.
By implementing Alcons’ pro-ribbon technology for
mid and high frequencies, a super-fast impulse
response with up-to-90% less distortion is achieved.
This enables the LR18 to offer a fully intuitive linear
response, with perfect intelligibility and noncompressed identical tonal balance at any SPL.
The all-natural cylindrical wavefront of the multiplepatented, purpose-designed RBN702rs 7” pro-ribbon
transducer and the acoustically and electronicallysymmetrical component configuration bring a uniquepattern control in both the vertical as well as thehorizontal plane, without any distortion-inducing hornconstructions.
The patented constant 120-degree horizontal

dispersion is maintained up to the highestfrequencies.
The pro-ribbon’s power handling of 1500W and RMSto-peak ratio of 1:15, caters for a superb intelligibility
and throw with maximum dynamic headroom reserve.
The MF-section features a high-efficiency 6.5”
midrange transducer with Neodymium motorstructure, coaxially mounted behind the HF driver in ahorn-loaded configuration.
The LF section consist of 2 extended-excursion, reflexloaded 8” woofers with oversized 3” voice-coil
Neodymium motor-structure, surpassing the output ofeven larger drivers, while maintaining an unobtrusive
face print.
The LR18/120i is driven by the Sentinel amplified

211122 • Due to Alcons Audio’s continuous R&D, all specifications are subject to change without prior notice.

evolutionary audio solutions™

loudspeaker controller, optimising the system’s
response by LR18-specific drive processing andfeedback for each array configuration, including
presets for phase-matched low-frequency extensions.
The Signal Integrity Sensing™ pre-wiring ensures
dynamic cable/connector compensation between theLR18 and ALC; This offers a 1:1, undistorted naturalsound reproduction, regardless of cable length andamplifier impedance load (system damping factor10.000).

The LR18 is available with a 90° (LR18/90) or 120°
(LR18/120) horizontal dispersion; Both models comein a touring version or “i” installation version (LR18/90i,LR18/120i). The install versions come without handles
and with a simplified rigging system with a WLL of 12
cabinets under 10:1 safety.
Array configurations can be simulated in the AlconsRibbon Calculator (ARC), Alcons’ high-resolution 3D
simulation program.

technical specifications LR18/120i
dimensional drawing

technical specifications
Frequency response

70 Hz - 20.000 Hz(+/- 3 dB)

51 Hz -(+/-10 dB)

Sensitivity nominal

105 dB (200 Hz - 10 kHz)

Nominal impedance

LF 8 ohms, MHF 8 ohms

Recommended drive

Sentinel10, max. 3 pcs. per channel (2.7 ohms)

Nominal SPL peak

139 dB (Sentinel10 200 Hz - 10 kHz)Dispersion H x V (array)

120° x depending on array length

Dispersion H x V (single)

120° x 10° (@10kHz)

physical specifications
System

3-way, full-range

Filtering

2-way active, 2-way passive

Drivers LF

2x AW8.3ND-16 8”, vented

Drivers MF

1x AM65ND-8 6.5”, sealed

Drivers HF

1x RBN702rs 7” pro-ribbon driver

Connectors

2x Speakon NL8 input/link

Physical dimensions

mminches

Height226

8.9

Width790

31.1

Depth436

17.2

Weight (approx.)kg

lb2759,5Warranty

A:

Alcons Audio
De Corantijn 101689 AP ZWAAGThe Netherlands

E:
W:
T:

info@alconsaudio.com
www.alconsaudio.com+31 (0)229 28 30 90211122 • Due to Alcons Audio’s continuous R&D, all specifications are subject to change without prior notice.

6 years limited

evolutionary audio solutions™