Alcons Audio’s LR18/120, a three-way mid-size line-array sound system and addition to the LR18 line array family, is now shipping.
With Alcons’ pro-ribbon technology for mid and high frequencies, an impulse response with up-to-90 per cent less distortion is achieved. This enables the LR18/120 to offer an intuitive linear response, with non-compressed identical tonal balance at any SPL.
The cylindrical wavefront of Alcons RBN702rs seven inch pro-ribbon transducer and the acoustically and electronically symmetrical component configuration caters for a coherent pattern control in both the vertical as well as the horizontal plane, without any distortion-inducing horn constructions.
The pro-ribbon’s power handling of 1500W (200 milliseconds, which is ten times the industry standard) and RMS-to-peak power handling ratio of 1:15 (common industry ratio is 1:2) are other positive features.
Completing the three-way configuration for mid-frequencies is a horn-loaded 6.5 inch midrange transducer, coaxially mounted behind the HF driver. The LF section consists of two reflex-loaded eight inch woofers and an oversized three-inch voice-coil Neodymium motor-structure.
System drive is taken care of by two channels (bi-amp) of the Sentinel amplified loudspeaker controller, with LR18-specific drive processing and feedback for each array configuration; The presets now also include Alcons’ “VHIR processing” including phase-matching with any Alcons system.
The Signal Integrity Sensing pre-wiring ensures dynamic cable/connector compensation between the LR18/120 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 rigging system enables angle-setting on the cabinets without lifting the array, resulting in safer and faster set-up with minimal handling and a Working Load Limit of 24 cabinets under 10:1 safety.
Philip “Dr. Phil” de Haan, Alcons’ head of R&D, commented: “The development of the wide-dispersion LR18 is a direct result from requests from our The Ribbon Network (Alcons global dry-hire rental cooperation network) members group. Over the last year, we’ve been working on different dispersion patterns for all our products with our pro-ribbon transducer technology, resulting in different patent-applications.”
Haan continued: “With the LR18/120, we’ve been able to get a very wide, seamless 120-degree coverage up to the highest frequencies beyond 20kHz, while maintaining the unique projection properties of the pro-ribbon line-arrays. The coherent vertical dispersion eliminates destructive interference, resulting in optimal high-frequency throw and wind-stability. This brings the renowned Alcons HiFi sound quality at concert SPL’s to a wider audience; or as we say “WYMIWYG, What You Mix Is What You Get”.