The QR24/110 is a modular 2-way column loudspeaker to be used as scalable vertical
array system, for both permanent and (limited) portable applications.

It combines a 1:1 linear and dynamic sound reproduction with superb intelligibility
and throw, in even the acoustically most challenging environments.

The symmetrical acoustic design, in combination with the wide, patented 110-degree
horizontal dispersion of the RBN High-Frequency drivers (all the way up to 20 kHz),
offers a coherent horizontal pattern control with seamless coverage. This widens the
“stereo sweet spot’ significantly, for the off-axis positioned audience.

By using only 2 12′ RBN pro-ribbon transducers for the mid-high frequencies, the
system’s 90% active frontal radiation results in a sharply-controlled vertical
dispersion. This offers a unique, SPL-independent intelligibility-over-distance, without
the necessity of DSP-based beam-shaping.

The flat frequency response and the fast transient response of the RBN mid-high
frequency transducers, in combination with the sharply controlled dispersion, brings a
maximum “gain-before-feedback’ up to directly in front of/under the system.

Each purpose-designed RBN1203 12′ pro-ribbon driver has a peak power handling of
2.000W (200 msec), creating a virtually infinite system MHF headroom of 4.000W
from 1kHz up.

The low-mids are taken care of by 4x high-excursion, vented 6.5′ transducers, which
are co-axially mounted behind the pro-ribbon drivers, delivering a frequency response
of 74 Hz – 20.000 Hz (-3dB).

The controlled (cylindrical) projection can be extended down to the lower frequencies
by enlarging the array length through adding extra QR/QM modules (extending the
“near field’). Up to two QR24 units can be combined on a single tripod stand, forming
a 1,32m / 52-in. tall array; In flown configuration, up to 11 cabinets QR24 can be
connected, with the integrated flying hardware under a safety-rating of 10:1, forming
arrays of more than 7 meter / 24-ft tall.
The passive filtering allows multiple modules to be combined on one amplifier
channel, up to 3 units.

The QR24/110 is powered and controlled by the ALC amplified loudspeaker controller;
Through the integrated processing and feedback, the ALC offers QR24-specific drive
processing with optimal response and reliability and utmost user-friendliness.

The Signal Integrity Sensing™ pre-wiring dynamically compensates for speaker
cable/connector influences between the QR24 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 QR24 is also available as QR24/80, with 80-degree horizontal dispersion and can
be combined with the QR24/110 in the same array.

Certified EASE data for the QR24’s with a 1-degree resolution accuracy is available on
the Alcons website.

Philip de Haan, head of Alcons Audio research and development states: “The QR24
remains a unique tool in the sound designers toolbox. We always get surprised looks
when we demonstrate the unique razor-sharp edged vertical dispersion or the
intelligibility at distances in excess of 100m/330ft with only 2 QR24 on a tripod stand.’

Ever since the first installations at Red Bull’s Hangar-7, the Koekelberg Basilica in
Brussels, the Finnish National Theater, or the Flex club in Vienna, the scalable Q-series
has made the crucial difference in tall ceiling theatres, reverberant churches, all-glass
dome venues, low-ceiling clubs or deep, 10.000 seat council meetings.

Philip continues: “the natural cylindrical wavefront of our pro-ribbons is the prominent
part of the QR24’s unique combination of a high-output, full-range HiFi response with
a flat SPL coverage over distance, in even the most difficult acoustical environments.
Or as a client put it: “using Q-series is like switching off the room reverb.’