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nological support, is both comprehensive and seamless. Being part of the initial design meetings made a great deal of the difference to the final installation. AV was not an after thought, but instead a key player throughout the entire New World Symphony facility. Right from the start of the project, we were able to coordinate with the architect on the room layouts, adjacencies and shaping, as well as equipment requirements. In fact, we kept most of the equipment purchasing until the last minute so that the technology used in the final commissioning could be the latest and greatest.” The acoustic sails designed by Nagata Acoustics are outfitted with ATC loudspeaker components specified by Sonitus and ATC engineering staff. The central sail is configured with discrete left, centre and right loudspeaker channels, while the remaining four sails located either side of the auditorium serve as additional surround- sound or individually addressable playback channels for multi-screen presentations. A pair of transportable stage-mounted systems was also provided to augment the sail-based channels during amplified concerts in the hall. All loudspeaker systems are powered by ATC P4 amplifiers. According to ATC Managing Director and Head of Design, Billy Woodman: “It is the received wisdom that when sound reinforce- ment is used in large reverberant spaces, loudspeakers with control- led and narrow dispersion are best suited to the purpose since, generally, they are more efficient due to the restricted radiation en- velope, they will not excite as many early reflections, and they deliver sufficient direct sound to the listener to guarantee good intelligibility. This approach is generally the best solution, except in the case of auditoria that have a quality acoustic, defined simply by a consistent RT60 over the 50Hz to 3kHz range. “In the case of such auditoria, the best results can be obtained with loudspeakers of very low colouration, flat magnitude response, mini- mum phase response and wide dispersion, thus ensuring an accu- rate direct sound to the listener, as well as correctly presented early


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reflections and resultant reverberant field. Implemented with care, the reinforcement - particularly for a main, stage-mounted system - is achieved in a manner such that the listener will be unaware that a performance is being reinforced. “It is characteristic of all PA-type systems that they have narrow dispersion, high levels of colouration, poor phase and magnitude re- sponse and, consequently, are subject to precedence-type effects, where attention is drawn to the source of the reinforced sound. This, at best, is very distracting for the listener and, at worst, downright annoying. Such distraction is further exacerbated by the practice of flying both main systems and clusters above the stage and audi- ence, thereby creating a psycho-acoustic disconnect between the performers on stage and the source of the reinforced sound.” The main acoustic sail’s L-C-R configuration is made up of a varia- tion on soffit-mounted ATC SCM300ASL-based systems, but with extra mid-range and HF capacity. The four surround loudspeak- ers comprise soffit-mounted ATC SCM150ASL-based systems. “The stage-mounted system is, essentially, made up of a double SCM300ASL - four 15-inch drivers - forward facing with a side firing, double SCM50ASL mounted on a lifting mechanism to cover the side seating,” Woodman says. “The hall is also equipped with 15-inch ATC subwoofers - four mounted under and four mobile on stage - as well as instrument highlighters, including a custom SCM150ASL for piano and various SCM50ASLs and SCM20ASLs for other instruments.” At the back of the stage area, above the rear seats, there is also a pair of SCM50ASLs down-firing from the ceiling, and a pair of SCM20ASLs under the auditorium’s lighting booth. “The sail-mounted and main stage systems are designed to operate independently, coming together for the loudest concerts,” Woodman concludes. “However, best performance for both classical and jazz acoustic performances will be achieved using just the main stage system.”


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