Alcons Extends Coverage Of The QR24 Line-Source Column

The QR24/110 is a modular two-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 two 12″ RBN pro-ribbon transducers for the mid-high frequencies, the system’s 90 percent 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 millisecond), 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 1.32-meter / 52-inch 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 meters / 24 feet tall.

See also  Listen to What Is Being Said (If You Can)

The passive filtering allows multiple modules to be combined on one amplifier channel, up to three 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.

You an find Alcons here.

Sara Abrons

About Sara Abrons

Sara Abrons is editor-in-chief of rAVe [Publications] and a graduate of the School of Media and Journalism at the University of North Carolina at Chapel Hill. Reach her at sara@ravepubs.com or on Twitter @SaraAbrons.