Auckland Transport’s recently opened Ōtāhuhu station is more than a piece of infrastructure: it is a public sculpture. The new $28m interchange features stunning floor to ceiling glass and it aims to give a sense of history and culture, in addition to its primary objective of assisting commuters to take the train or bus.

With long hallways, large echo-ridden rooms and many reflective surfaces, it takes a good understanding of acoustics, as well as an understanding of architecture, design and construction to deploy an effective and intelligible sound system. Systems integrator Bartons Sound Systems knows this all too well having designed and installed many transportation sound systems over the years.

The design called for effective audio coverage within the main commuter infrastructure. The room was split into two zones, the lower atrium and the main mezzanine commuter platforms that stretches over 25 metres. Integration with an existing railway platform was also required.

Two JBL Intellivox DSX280 Active Beam Shaping Column speakers were selected due to their self-sufficient design of being powered, on-board DSP that could adjust to the acoustic requirements of the venue and ability to maintain an even sound pressure over long distances. This reduced the total equipment requirement considerably which in turn reduced the cost to the client.

Rob Waddell, Bartons Lead Systems Engineer specified the JBL Intellivox column speakers. Rob comments “Apart from the need to have an intelligent speaker that could automatically adjust volume and actively manage the acoustically challenging space, we selected the DSX Range as the application required high measurable speech intelligibility.”

The Digital Directivity Synthesis (DDS) concept is used in the beam shaping JBL Intellivox column speakers. This concept is well-suited in areas that have acoustically challenging spaces as minimum energy projection can be achieved at a room’s boundary.

FIR output filters are calculated by ‘reverse-mapping’ the desired audio coverage of a hall or space back to the column array. On-board DSP takes care of the real-time signal processing, surveillance routines and networked logging to achieve the best match between the desired and actual array response.

Rob concludes, “With the many reflective surfaces and complex panelised ceilings, the Intellivox column array system with its beam shaping ability covered the zones perfectly, with minimal reflection off of the hard surfaces.”

The Auckland Art Gallery Toi o Tamaki is New Zealand’s oldest established and largest public art gallery. Opened in February 1888, the gallery has increasingly become a focal point of Auckland’s art scene, and now lies at the heart of the New Zealand art experience for both the local community and visitors alike. Major restoration and expansion work completed in 2011, totalling $121 million, has transformed the building into a world-class cultural facility.

JPRO and Provision worked together to provide a networked audio system as part of the AV upgrade. The original specification was for an all in one AV & Fire/EVAC networked system. After much consultation it was deemed prudent to install a standalone AV system to provide better redundancy.

“This project was unique, in that two of the buildings we were cabling were Heritage Buildings over 100 years old, and not linked, while demolition and construction continued around us,” comments Stephen Ward, project manager and lead designer. “I was able to draw from my knowledge and experience from working and maintaining similar heritage sites in the UK, such as the Royal Society of Art and Tait Britain to assist with the planning and implementation of this project. It allowed me the insight and understanding as to how the client would ideally use the spaces.”

With the project being completed in stages the ability to link areas could only be completed once all construction was done.

One of the design challenges was to provide an audio network with up to 25 discrete zones and over 100 patchable inputs (4 per zone), as well as a separate BGM and Paging level control per zone. Each of the 25 Zones then needed the flexibility to be virtually patched to any combination of other zones. And then just to make life interesting, the main control for these zones was to be placed on a wireless touchscreen so that the venue technician could roam the gallery and make patching and level alterations as required.

The BSS London BLU-100 range of signal processors with built in 48 Channel Digital Bus allowed the flexibility they required to make this work within their tight budget.

Stephen continues “The audio was of high importance due to the changing nature of the open spaces in the art gallery and varying exhibitions and the use of the London Soundweb DSP in conjunction with a third party control system allowed us complete flexibility in its design and linking. This provides the ability to expand the AV systems in a modular way and meet the users ever changing needs.”

Provision went about installing 10 Soundweb BLU-100’s between the five AV plant rooms. An audio network was setup between the plant rooms using fibre optic cable which linked the forty eight channel digital audio network and Ethernet control. Every room also had Crestron wireless access points, which enabled compete network coverage of the Crestron tablet. Crestron and Soundweb London integrate extremely well together with BSS being an integrated partner.

The mammoth task of mapping the level controls from 10 different Soundweb DSP began. Logan Bent programmer for Provision with 15 years’ experience and dozens of existing projects involving BSS Audio and Crestron went about the task of integrating the two systems. Logan comments “The actual programming was relatively straight forward once a clear scope of works and client discussions in developing the interface were conducted. The most time consuming component during implementation and commissioning was the grand scale of the project. The greatest challenge with the interface was coming up with a way to overflow any of the inputs to any of the output zones. Along with that a simple way to disable a certain link was needed.”

After the cabling was complete the hardware installation commenced with JBL Speakers being a focal point of the design and a prominent yet discrete feature of the building. In keeping with the Architects vision within the context of an iconic Art Gallery, very low profile discrete speakers were required. In total over 250 JBL speakers were installed throughout this complex including Control 26CT, Control 24C, AC28-95, Control SB-210, Control50ST, Control 25AV, Control42C speakers.

The Great Hall is its centrepiece, seating up to 1,529 people in theatre-style on three levels. Designed for live performances, it includes a 17 metre stud and permanent concert platform. To ensure an exceptional audio experience for patrons with consistent, reliable sound coverage, the Great Hall received an audio upgrade to a JBL Professional high performance audio system. Auckland Live contracted Liquid Automation for the supply, programming and installation of the system.

Liquid Automation’s Commercial Sales Team noted that there were several important considerations when contemplating the design for this audio system, which were re-enforced by their customer Auckland Live who had very high expectations for its performance.

Firstly the heritage status – any system would need to be approved by the heritage panel so that it could not be any more obtrusive than the existing system and the Loudspeakers had to blend in with the existing colour scheme and overall look of the reflector panels.

Secondly the system must be easy to use for day to day operation as the Town Hall is a multi-use venue and the operators needed to be able to reconfigure the system to allow any combination of speaker zones to be activated, and it should be configurable as delay support for temporary PA systems when required.

The technical considerations included the redesigning and installation of new speaker brackets within the permitted loading limits, providing consistent sound coverage across the three vertical levels of seating, achieving good speech intelligibility from the audio system within a reverberant venue, fixing historical issues with noise in the audio chain caused by the mains power supply in the venue, the long cable runs between amplifiers and speakers and, the long analogue cable runs between the operating positions and amplifiers.

With a building of this heritage, three design approaches were considered: firstly a Line Array solution (JBL VTX), secondly a Steerable Array Column solution (JBL Intellivox) and thirdly a Point Source Cluster solution (JBL PD – Precision Directivity).

Careful consideration was given to each approach including in-depth modelling and system design. After a detailed review of all options the JBL Precision Directivity Point Source Cluster was considered to be a highly effective approach.

The PD6322 Full Range Three-Way Loudspeakers and the PD6212 Full Range Two-Way Loudspeakers allowed excellent vertical and horizontal pattern control and, good bandwidth response down to 40hz (PD6322) as well as the ability to precisely aim the cluster and in keeping with the aesthetic of the previous system.

Liquid Automation’s Commercial Project Manager and Shore Engineering Ltd co-designed the main central cluster array bracket to allow fine adjustment “pan/tilt” of every speaker in the cluster. The speaker angles were set in precise alignment in accordance with the computer modelling.

To complement the PD central cluster, JBL Application Engineered Series AC16 two way compact loudspeakers were installed under the balcony areas and were also used for stage fills and delays. The AC16 speakers offered high output and high fidelity which was required for the system brief of a multi-use sound system.

JBL CBT70J Constant Beamwidth Technology™ Two Way Line Array Column speakers were used for Circle delays. “The asymmetrical vertical coverage of these speakers sends more sound towards the far area of room to make front-to-back sound levels more consistent,” says Paul Edlin, Audio Designer at JPRO. “This made these speakers the perfect choice for the circle delays.”

Dante Audio was enabled using BSS BLU Processors allowing for a noise free digital backbone of up to 128 channels between the three critical locations – the control booth, the lower plant room below stage floor and the upper amplifier rack in the town hall roof.

All three were connected via fibre optic cable. The BSS Soundweb network provides complete routing options between all three locations as well as automated scenes to enable any combination of speakers to be turned on or off which allows for maximum flexibility.

Using Harman’s own HiQnet Audio Architect control software, Liquid Automation provided an elegant user interface using a touch screen PC to help the operator quickly and easily switch between the required modes to fine tune the setup. Audio Architect gives the system administrator one software platform to help manage and control the critical components in the system in real time including BSS Soundweb (routing), Crown ITech amplifiers (main cluster) and Crown DCI Amplifiers (all delay speakers).

Continuing on with a need to make the system fully digital, the Digital Mixing Console chosen was the Soundcraft Si Performer as it allowed direct connection to Soundweb (via Dante) while also allowing a fibre optic stage box to be run to the stage for additional patching (via Madi).

Auckland Live Technical Operations staff and clients have commented on the excellent audio in the Great Hall. “The versatility of the system has reduced the need to install temporary sound reinforcement systems for events. Back-up and support from JPRO through initial teething issues has been excellent.”

The Opportunity

Les Mills Auckland gym at Britomart has had it’s main studio audio officially upgraded and the club is HOT!  It is a lavish 2200sqm of purpose-designed, cutting-edge fitness facility. With a high-impact designer interior and a light and sound system investment of over $1 million.

VideoPro were approached by Les Mills to deliver a state-of-the-art audio visual solution for the new Britomart site, having designed and installed several other high-end solutions for the group.

The Solution

The design consists of a Fibre Optic back-bone for both audio and video distribution.

The main studios feature JBL VRX932LAP powered loudspeakers and VRX918SP powered subwoofers with the rest of the gym covered off by the JBL Control25AV loudspeakers.  The background music system is powered by Crown amplification.

All and all this is one cool gym.

The Impact

“The main studio’s have been designed to provide high impact, nightclub sound.  The JBL system does not disappoint.” Paul Edlin, System Designer, JPRO.

In September, 2010, Mother Nature dealt a cruel blow to the southern region. The roof of Southland Stadium collapsed under the heaviest snowfall seen in decades, causing extensive damage to the main arena and seven community courts. From adversity has sprung a new stunning multi purpose venue, capable of conducting a wide range of event modes from large scale concerts to sporting events and exhibitions.

The main SBS Sports Arena in the stadium has a capacity of 4,500, with retractable seating. The stadium also has eleven other community basketball, netball and volleyball courts, four rebound Ace tennis courts, four squash courts and several business / function rooms.

The audio equipment is installed in two racks. The first, in the main plant room, consists of three BSS BLU series processors – a BLU-800 for processing, two BLU-120’s for input and output expansion, and two Crown CTS8200CN multi-channel, Cobranet amplifiers.

Minimizing cable run lengths was an important aspect of the stadium system design, so the second equipment rack was located on the gantry level above the stadium floor. This rack houses a second BLU-800 processor, a BLU-BOB and eleven Crown MacroTech HD amplifiers. Audio transport between the two rack locations is via Cobranet digital networked audio.

Twenty two JBL Precision Directivity PD5322 speakers cover the main arena seating. These are switchable in pairs for maximum flexibility and level matching through the stands, and to allow areas to be turned off when not in use.

The Community Courts and foyer are covered by JBL CBT-70J speakers, and other areas supplemented by JBL Control 47C/T in-ceiling speakers and Control 67HC-T high ceiling pendant speakers.