technical specifications LR18/90
general•High-performance line-array system for small tomedium applications•HiFi sound quality at concert Sound PressureLevels•7” pro-ribbon HF section with exceptional
intelligibility and “throw”•Maximum dynamic headroom reserve with lowest
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 LR18/90 is a 3-way, “compact-mid-size” format
line­source sound system, combining the highest
sound quality possible with very high SPL capabilities
and throw.
By implementing Alcons’ pro-ribbon technology tor
mid and high frequencies, a super-fast impulse
response with up-to-90% less distortion is achieved.
This enables the LR18/90 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 multiple­
patented, purpose-designed RBN702rs 7” pro-ribbon
transducer and the acoustically and electronicallysymmetrical component configuration bring a uniquepattern control in bath the vertical as well as thehorizontal plane, without any distortion-inducing horn
constructions.

The patented 90-degree horizontal dispersion ismaintained up to the highest frequencies.
The pro-ribbon’s power handling of 1500 W and RMS­
to-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 a slot-loadedconfiguration.
The LF section consist of 2 extended-excursion,reflex-loaded 8” woofers with oversized 3” voice-coil
Neodymium motor-structure, surpassing the output ofeven larger drivers, while maintaining an unobtrusive
face print.

030919 • Due to Alcons Audio’s continuous R&D, all specifications are subject to change without prior notice.

evolutionary audio solutions™

The LR18/90 is driven by the Sentinel amplified
loudspeaker controller, optimising the system’sresponse by LR18-specific drive processing andfeedback for each array configuration, including presets
for phase-matched low-frequency extensions.
The Signal lntegrity Sensing™ pre-wiring ensures
dynamic cable/connector compensation between theLR18/90 and ALC; This offers a 1 :1, undistorted naturalsound reproduction, regardless of cable length andamplifier impedance load(system damping factor 10.000).

The rigging system enables angle-setting on thecabinets without lifting the array, resulting in safer andfaster set-up with minimal handling and a WLL of 24
cabinets under 10:1 safety.
Array configurations can be simulated in the Alcons
Ribbon Calculator (ARC), Alcons’ high-resolution 3D
simulation program.

technical specifications LR18/90
dimensional drawing

technical specifications
Frequency response

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

51 Hz -		(+/- 10 dB)

Sensitivity nominal

106 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

140 dB (Sentinel10 200 Hz - 10 kHz)90° x depending on array length

Dispersion H x V (single)

90° x 10° (@ 10 kHz)

436

Dispersion H x V (array)physical specifications

259
226

790

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”, vented

Drivers HF

1x RBN702rs 7” pro-ribbon driver

Connectors

2x Speakon NL8 input/link

Physical dimensions

mm		inches

Height226 		

8.9

Width790		

31.1

Depth

436		

17.2

kg		

lb

28		

61.7

Weight (approx.)

Warranty

A:

Alcons Audio
De Corantijn 69
1689 ANZWAAGThe Netherlands

E:
W:
T:
F:

info@alconsaudio.com
www.alconsaudio.com+31 (0)229 28 30 90+31 (0)229 28 30 99030919 • Due to Alcons Audio’s continuous R&D, all specifications are subject to change without prior notice.

6 years limited

evolutionary audio solutions™