In total 38 JBL VTX A8 have been rigged in their own flying frames at the Arena.
The set-up needed to be flexible as, thanks to a partition wall which closes the balcony, multiple events can be hosted simultaneously; for example, a banquet for 750 on the auditorium floor can be complemented by a seminar ongoing within the Circle, with no risk of interference or distraction. It was vital therefore that the sound system needed to be quicky reconfigurable and effective across the board.
The standard ‘full arena’ set-up is therefore two hangs each comprising 12 x A8 and 6 x B18 subs in cardioid configuration forming a conventional pros arch system. An additional 6 x B18 subs are available for ground-stacking as required. Two delay hangs each comprise of 5 x VTX A8 and 1 x VTX B18, plus four further VTX A8 as front fills, and a VTX M20 stage monitor package.
Powering the system are 15 Crown 4x3500HD amplifiers, while routing and processing is via BSS Soundweb BLU-806 and BLU-100.
The room can then be configured into conference mode, when the front rake goes in and the box angles change and reduce to eight a side; extra enclosures are then added to the delay arrays which are lowered and angled up slightly when the acoustic partition drops to divide the hall.
Matt Watt, Head of Sound Technology’s Application Team worked with ATG and Glantre on the design proposal and acoustic modelling.
“We modelled several alternative solutions before settling on the flexible A8 design.” commented Matt. “We were limited by the curtain as to where the speakers could be positioned, and the system still needed to work as delay for front of house and as the independent conference system. A8’s ease of rigging makes the reconfiguration of these areas possible as it’s so quick and easy!”
Glantre set up and optimised the entire system using JBL LAC (Line Array Calculator) and Performance Manager software, with BSS and amp config, working closely with Matt and Danny at Sound Technology’s Applications team, who were responsible for final commissioning. Glantre’s project manager and senior engineer, Tim Davies, explained, “There are a number of operating modes, both standing and seating and set up various presets as a base, with three or four different configurations.
“Essentially it’s a converged network and runs on the IT hardware, apart from the lighting.”