Tag:installed sound

Believed to have cost around S$1.33bn (US$1.06bn), the Singapore Sports Hub includes a 55,000-capacity stadium, the 6,000-capacity OCBC Aquatics Centre and the 3,000-capacity Arena, which can be divided into six halls, Water Sports Centre – as well as commercial areas for leisure, shopping and dining activities.

Singapore Sports HubBuilt on the site of the former National Stadium in Kallang, the complex, responsibility for the event sound system and giant HD screens fell to Electronics & Engineering (E&E). Working to an architectural and engineering design prepared by the consultants, E&E specified more than 130 Powersoft K-Series and Duecanali Series amplifiers to drive the various PA and sound reinforcement systems.

The audio installation features equipment from manufacturers including EAW and Community loudspeakers, Powersoft amplification and Allen & Heath mixing systems, all integrated through a digital audio network based around Symetrix’s SymNet Edge open-architecture Dante-enabled DSPs. 
According to E&E MD Ronald Goh, the project is ‘probably the largest high-powered distributed audio system that we have ever worked on’. 

E&E, which also installed the original National Stadium’s audio system in 1973, required that the DSP system incorporate bespoke integration of Powersoft amplifiers – a process that entailed a close and successful cooperation with Symetrix technical support in the US. ‘We worked with the Symetrix team to include customised Powersoft modules that allowed for integrated monitoring and control of K-Series and Duecanali amplifiers within SymVue and SymNet Composer,’ confirms Goh. 

The loudspeakers

Singapore Sports HubThe aim was to provide intelligibility, high output and pattern control through the venue. In order to achieve this, a combination of EAW QX Series loudspeakers – weather-protected (WP) and custom painted to blend into the ceiling – were installed under the roof line. The point source system 35 QX544-WP, QX594-WP, QX596-WP, QX5641-WP and QX566-WP enclosuers.

‘The QX loudspeaker is able to achieve constant directivity all the way from 80Hz to 20kHz,’ explains Goh. ‘Because it is a coaxial loudspeaker the high and mid is on the same plane, and I have bass on the same plane also. It sounds amazing.’

The VIP sections are covered by three MQX installed on each side of area. The MQX is a custom tri-axial three-way system, which provides high output with optimal directivity from a relatively compact enclosure. It uses components from two QX564 built into a custom cabinet that uses a two-cell MF/HF section driven by two of the QX co-axial devices all symmetrically surrounded by eight 12-inch woofers.

Low end sound reinforcement is provided by 12 clusters – each comprised of four EAW SB528z-WP subwoofers – suspended from the ceiling in a downward firing cardioid array delivering extended low frequency information down onto the listening area but not up into the stadium roof.

The two-level OCBC multi-purpose indoor arena consists of six halls that are designed to be scalable in size and to cater to an array of indoor sports events for both National Sports Associations as well as the general public. A distributed audio system comprised of 46 EAW MK2396i and 8 MK2399i loudspeakers takes care of the audio needs for Halls 1 & 2 two on Level 1.

The 3,000-seat aquatic centre is designed to host a variety of community, regional and international competitions. The space, designed to provide the general public and elite athletes with state-of-the-art facilities, will also host community-run events and premier aquatic competitions. In this application, E&E again turned to EAW’s MK Series loudspeakers to create a distributed, point-source system for the room. Thirty-four two-way MK 5399 loudspeakers were installed in the catwalk to cover the expansive area. Another 22 LS432 column loudspeakers are mounted poolside to service the corridor and side seating areas to the pool.

The Sports Hub includes a watersports centre located along the Kallang Basin that offers canoe and kayak courses, with a 500m Regatta course. Announcements and playback to the vast area are made via a three QX loudspeakers installed on top of the water sports centre tower.

The network

Singapore Sports HubMore than 85 SymNet Edge frames have been installed across the project in amplifier/control room racks and facility panels, providing the technical crew with huge versatility and consistent support for Audinate’s increasingly ubiquitous Dante media networking technology. ‘SymNet Edge was chosen both because it powerfully supported Dante – the chosen audio distribution platform for this project – and because the modular input/output cards, including AES/EBU and the analogue I/O cards, provided us with the flexibility required for the audio distribution network,’ Goh explains.

Quick and easy remote control of the processing set-up is enabled by the installation of the SymVue GUI on technical personnel’s laptops and tablets. Transmitting and receiving up to 128 channels (64x64), the digital network itself is configured and administered over the site’s IT infrastructure. 

The network design for the audio transmission involved switching via 40 Netgear Gigabit 1000 base network switches. The main racks hold 70 Powersoft K10 amplifiers (1.2kW into 2Ω) and 26 K2 amplifiers, incorporating the company’s proprietary DSP+AESOP giving integrated sound shaping and system management.

The location for the amp racks was determined at an early stage in order to minimise the cable runs to the speakers – 16 air-conditioned racks are placed up on the catwalk, from where they power six EAW MQX speakers, 35 QX speakers and 48 SB528zP subwoofers to serve the stadium bowl. The system processing is from Symetrix SymNet Edge DSP, with a PC to run Dante software control and patching.

This was logistically challenging in view of the available space. E&E Deputy Managing Director Gary Goh says that, despite the limited rackspace, the Powersoft amplifiers provide extraordinary power from a 1U-high chassis: ‘To derive sufficient power from such compact real estate required the switch-mode technology of Powersoft’s K series, with its incredible power-to-weight ratio. It really helped to maximise the space efficiency,’ he reports.

Powersoft K10

The audio distribution is based on an network running AES inputs as standard and analogue inputs as backups. The amplifiers are controlled and monitored via Powersoft’s Armonía Pro Audio Suite software and deliver EAW Greybox settings in the DSP to the loudspeakers.

Elsewhere, a similar network was constructed for the OCBC Arena, using Powersoft’s energy-saving Duecanali two-channel installation series. Via Netgear 1000-base network switching, in Amp Room 1 22 Powersoft Duecanali D3904 amplifiers were specified to power large quantities of EAW and Community loudspeakers at various levels in all six halls – with signal processing again carried out in SymNet Edge, with signal transport over Dante.

Operating on the same principle in the Aquatic Centre are a further 15 Powersoft Duecanali D3904 amplifiers populating Amp Rack 1 & 2 to power the EAW loudspeakers installed at the catwalk to serve the swimming pool area and further column speakers, installed at pool side, to service the corridors.

The final use of Powersoft amplification is in the Water Sports Centre, which, like the other zones is fully featured with Netgear switching, Symnet DSP, full audio control/mixing and playback devices. Here, three Duecanali D3904s can be found in the Amp Room driving three EAW speakers installed at the top tower of the centre.

Symetrix International Sales Manager is Mark Ullrich ‘delighted to see our processors selected for such a prestigious project and deployed in a way that truly exemplifies the benefits of SymNet’s Dante networking’.

‘The clients trusted us to deliver all their technological requirements, and I am confident that we have succeeded,’ Goh adds.

More: www.symetrix.co
More: www.eaw.com 

Now renamed the TD Place Stadium, Ottawa’s Lansdowne Park and its stadium is home to two new professional sports teams and is also ready to host major music concerts. Alongside the recent structural refurbishment that has made this possible is the installation of an EAW loudspeaker system.

Lansdowne ParkWorking to an audio specification from by BAI Consulting, EAW distributor SFM looked to full-range, two-way loudspeakers from EAW’s QX and MK lines, supported by SB Series subwoofers and UX8800 processors. All loudspeakers were ordered in their ‘WP’ configuration, which designates a weather-protected finish available in black, white and Pantone matched colours.

The overall design, which included detailed Ease models to show the system’s coverage, was approved by both BAI and the Ottawa Sports and Entertainment Group (OSEG). The A/V integration contract was awarded to Montreal-based Solotech’s Gatineau field office. EAW’s ASG team assisted in finalising details of the system.

‘This was a challenging installation for several reasons,’ says Solotech Project Manager, Greg Frechette. ‘Since it is an outdoor stadium with the south stands completely exposed to the elements, weather resistance was a major consideration. In addition, some speaker cabinets had to be custom-painted to match their surroundings. Then, the final challenge was the physical hanging of the speakers themselves.’

TD Place StadiumThe lower level seats of the stadium’s north side stands required seven dual-speaker clusters of the QX366, while the upper deck is covered by 11 narrow-dispersion (60° x 45°) QX364 loudspeakers, evenly spaced and individually hung. The same individual mounting approach was used for the lower level south stands covered by 14 QX326 units, chosen for their wide 120° x 60° dispersion.

Having a rounded roof and being fully exposed to the elements, the south upper deck and end zone seats required a different audio treatment. The main seating area uses eight identical clusters of two MK2326i, one MK2394i and a single SB250zP dual 15-inch subwoofer. The end-zone seats are covered by four clusters made up of a single MK2394i, the wider dispersion MK8126i and a single 15-inch SB150zP sub.

The stadium loudspeakers were delivered in EAW’s weather-protected black or white finish, and in some cases a Pantone matched concrete grey to blend into their surroundings.

‘Everything is performing extremely well,’ Frechette reports. ‘The coverage is very even, which was the critical part of the design, and the sound quality is amazing. I’m impressed with the range and power of the EAW cabinets.’

One of the biggest challenges of the installation was the hanging of the clusters. To save the significant expense of bringing in a crane to lift speakers up to the grandstands, Solotech worked with the construction contractor to pre-install the speakers on the roof structure while on the ground before it was all flown into place.

‘Once the roof was in place, all we had to do was final wiring and alignment,’ Frechette explains. ‘It saved our client a lot of money, and really shows the benefit of all the trades working together from the ground up.

‘SFM came to Ottawa several times to help us out, whether it involved the custom cabinets or tweaking the system DSP,’ he adds. ‘On a big project, everyone needs to play their role, and that’s something that the people at SFM definitely understand.’

The new TD Place Stadium opened for the debut game of the CFL Ottawa Redblacks, with all 24,000 seats sold out.

More: www.solotech.com
More: www.eaw.com


The most recent sound installation by artist Jana Winderen, Dive saw New York City’s seven-block-long Park Avenue Tunnel turned into a sea-themed soundscape for New York’s annual Summer Streets celebration. The project saw the tunnel temporarily made into pedestrian zone and fitted with more than 60 Meyer Sound loudspeakers to relay the sound of waves crashing along a seashore, as well as that of fish, seaborne insects and boats using Ambisonics.

DiveThe loudspeaker system configured by Tony Myatt, a professor at the University of Surrey: ‘There are a number of factors that led us to use Meyer Sound loudspeakers, including construction, size and weather resilience,’ he says. ‘Most significant is the high-quality design and sonic consistency, which means we can understand how a particular system design will perform wherever we take it.’

The audio system was divided into eight surround zones, each using eight UPM-1P loudspeakers split into upper and lower levels, and two 500-HP subwoofers. Winderen captured the recordings using DPA hydrophones, DPA d:screet 4060 omni microphones, and a Sound Devices 744T four-track recorder.

‘I make multi-layered mixes of the material, which requires exceptional clarity from the loudspeakers,’ says Winderen. ‘Using Meyer Sound allows me to deliver the detailed dynamics that immerse participants.’

Recent arts projects that have used Meyer Sound loudspeaker systems include Bill Fontana’s Vertical Echoes in the UK and Robert Henke’s Ritual in New York. The Meyer Sound components for this event were supplied by New York City-based WorldStage. Terry Jackson was project manager, and Kate Brown engineered the system integration specifics.

See also:
Case Study: Flying into the Dawn (Sound installation by Thor McIntyre-Burnie) 
Interview: Aleks Kolkowski – In Search of Perfect Sound (Sound installation by Aleks Kolkowski)
Recording the ‘Ice Whisper’ (Arts recording project by Juergen Staack) 


Located on the south side of Korea’s Jeju island, the Seogwipo Art Center includes an 802-seat auditorium and smaller 190-seat venue alongside its dedicated art gallery and an outdoor venue. Sound for these rooms was handled by Holy Land Technology, and called on EAW loudspeakers and Powersoft amplification

Seogwipo Art Center‘I have used most brands of amplifier before turning to Powersoft, but this is the first time I have used a digital amplifier,’ says Seogwipo Art Center Director, O Jonghak. ‘It is extremely convenient as I can check the status visually – something that I was unable to do with analogue amplifiers. The power output is more than I had expected and it is reassuring that there is no sign of any clipping whatsoever although there are many signals passing through the system.’

In the main venue, 16 EAW KF30P speaker have been installed, the HF and LF sections being powered respectively by three of Powersoft’s flagship K3 and three K10 amplifiers. The two main EAW JF29 centre speakers are run from a pair of Powersoft K2 amps and the four main SB730P low speakers by two K3, with further K3s assigned to four EAW SB1000zP subwoofers.

Surround speakers are served by three Powersoft M28Q four-channel amplifiers, while front fill and under-balcony speakers are assigned a Powersoft M14D. Additionally, a pair of EAW monitor wedges are driven by a Powersoft K3.

In the smaller venue, four EAW JF26s serve as the main LR system, powered by four Powersoft K2 amps, while a pair of JF10s provide the centre image, driven by a further pair of K2s. A Powersoft K3 powers the pair of EAW SB625zP subs and wedge monitors.

More: www.powersoft-audio.com
More: www.eaw.com

Part of a chain of 18 chic Muse nightclubs that have appeared around China, S.Muse has opened in the Binhai New Area (formerly Tanggu) in Tianjin. The 600-capacity, two-level venue is fitted out with an EAW Avalon dedicated club loudspeaker system. This is processed through EAW’s UX8800 DSP controller and accompanied by an Allen & Heath GLD-080/X live digital mixing system.

The main PA comprises four Avalon Club.two full-range loudspeakers firing down onto the dancefloor. The cabinets’ broadband directional control that creates high SPL on the dancefloor with minimal spill onto walls and ceilings. Four Avalon Sub.two subwoofers drive the low end of the system. A hybrid subwoofer, the Sub.two delivers extreme extension and the physical impact required by high-end nightclub applications.

Four compact Club.four loudspeakers serve as monitors for the DJ booth, and 14 EAW JF59 and ten EAW LA128ZR loudspeakers deliver music to the lounge areas on the first and second floors. The nightclub system usees two EAW UX8800 digital signal processors with Avalon presets to maintain sound quality while achieving maximum output levels

‘We demonstrated Powersoft’s reliability and high output, with an impressive power factor of more than 0.95,’ says Alan Ho, from Sanecore Audio, Powersoft’s Chinese distributor. ‘We also stressed the high signal-to-noise ratio and damping factor, with four presets onboard and selection button.’


Other important considerations for the installation were rack space economy – the 1U-high amps contributed to the overall efficiency of the system. The Powersoft solution won through on the strength of its built-in DSP, with each channel configured fully parametric EQ, and clip limiter. The Ethernet interface enabled simple system set-up, monitoring and control.

Four Powersoft K10 amplifiers (2kW/channel into 8Ω) were used, along with 22 K3 (1.4kW/channel into 8Ω) and nine M28Q 4-channel amplifiers (360W/channel in 1U). All these amplifiers offer remote control and advanced signal processing abilities through Powersoft’s Armonía Pro Audio Suite.

‘I think the performance of the EAW Avalon loudspeaker has pushed the sound effects of our club to their extremes,’ says club manager, Mr Sun. ‘Avalon is the most amazing dedicated sound system I have heard so far.’


Famed for its hosting of the annual Kentucky Derby, Churchill Downs racetrack required a new sound reinforcement system for all outdoor areas of the facility in readiness for the 140th running of the Kentucky Oaks and Kentucky Derby. Calling on the design services of Marsh/PMK International, the system that was devised made extensive use of a Lectrosonics TM400 Wireless System for Test and Measurement.

David Marsh‘The scale of this project and the tight schedule presented significant logistical challenges,’ says company President David Marsh. ‘These included having to work around horse training and a host of other activities during the four weeks or so leading up to the Kentucky Derby. Use of a wireless system was the only practical way to measure in the many different outdoor areas covered by the sound reinforcement system as part of testing, adjusting and final commissioning.

‘We used the Lectrosonics wireless link with an instrumentation quality microphone, the iSEMcon model EMX-7150,’ he continues. ‘The TM400 wirelessly connected the microphone to our Smaart 7 measurement platform, which was used for area-by-area delay setting and system equalisation. For this, we had to move the microphone around in a given area and average the measurements before moving to another area. One only needs to picture the size and layout of Churchill Downs to appreciate why we had to use a wireless test link.

‘Because the wireless system would be used strictly for acoustic and sound system testing, it was of paramount importance that signal integrity be maintained from the input of the transmitter to the output of the receiver,’ he says. ‘It hardly makes sense to use a microphone meeting the tight tolerances of ANSI Type 1/IEC Class 1 unless the wireless system has a flat frequency response and low noise. Likewise, it was critical that the original signal dynamics be preserved. Any type of dynamics processing – such as companding, commonly found in other wireless systems – would be out of the question. The robustness of the TM400’s RF front-end was important for measurement reliability as was the distance over which the system could reliably transmit. Use of standard XLR connectors at both ends and provision of 48V phantom power were icing on the cake.’

Before turning his attention back to forthcoming projects, Marsh adds: ‘We recently used the TM400 on an acoustic/electroacoustic study we are doing for the Arizona Cardinals at the University of Phoenix Stadium. Again, the equipment worked without a glitch. I am very happy with the Lectrosonics TM400 system and plan to purchase several more so we can be entirely wireless in a multichannel measurement set-up.’


Symetrix has appointed Pro AVLS as sales representative for Latin America and the Caribbean.

Pro AVLSBased in San Juan, Puerto Rico, and with an office in Margarita Island, Venezuela, Pro AVLS has expertise spanning more than 20 years, and takes on sales of the Jupiter line of fixed-architecture standalone DSPs, and SymNet open-architecture Dante scalable DSPs.

‘As Symetrix continues to grow globally, one of the next steps in this expansion was the addition of a dedicated sales and technical resource for Latin America,’ says Symetrix International Sales Manager, Mark Ullrich. ‘Pro AVLS was the natural choice for us in the region. Alex Rojas, president, has served as a Symetrix dealer with Caribbean Broadcast Suppliers, thus he and his team are already familiar with our product line. Both Alex and his colleague Guillermo Sánchez, based in Venezuela, also had tenure at Harman, so they are well versed in the sale and support of DSP solutions.’

‘There is a strong need for versatile DSP platforms in the region,’ says Pro AVLS Sales Director , Guillermo Sánchez. ‘Although there are many players in the market, we wanted to partner with a manufacturer that would give our customers an edge against competitors in terms of usability, compatibility, audio, reliability and price.’

‘Low-cost, turnkey products like Jupiter, an app-based DSP, are perfect for everyday installations, while the increased flexibility afforded by the SymNet line, including Edge and Radius AEC, can offer a scalable Dante-enabled solution for larger, more complex projects,’ he adds. ‘Symetrix can stand proud as it provides a product to solve every possible challenge and fit within every possible application.’

‘As we work together to bring market-leading DSP solutions to our customers, prospects and friends, they will see the benefits of Symetrix products and the benefit Pro AVLS brings to their toolset,’ says Pro AVLS President, Alex Rojas. ‘We are very proud of representing a brand with such great heritage and respect in the audio industry,’ he says.

With this new appointment, Symetrix expects more focus on and support of its existing distribution arrangements in the region. ‘We’re also looking forward to incrementally adding new strategic partnerships to ensure Symetrix has the most competitive positioning possible in Latin America,’ says Ullrich. ‘Latin America is a vast and dynamic territory, so taking this next step with a dedicated sales and support resource will help Symetrix fulfil the opportunities that exist.’


Midas M32Nicolas Kyvernitis Electronics Enterprises (NMK) has announced a further series of demo sessions for the Midas M32 mixing console to serve audio companies in the Gulf region.

The M32 live and studio digital recording system offers 40-input mixing console using the same mic preamps as found on the Midas Heritage consoles and a variety of connectivity options.

‘Since our first demo sessions, we have received the inquiries from UAE, Qatar and Bahrain,’ says NMK’s Midas/Klark Teknik Product Specialist, Pramod Manerikar. ‘The advantage of ongoing demo sessions is that clients have the opportunity to keep a console for a few days at their warehouse in order to test all the features of the mixer. During demo sessions they become familiar with console, experiencing the quality of preamplifiers and Midas build. The desk itself is very simplified and it takes a few minutes to gain knowledge of the basics.

‘In the past year we sold around 14 Midas Pro-Series for the Middle East market,’ he adds. ‘I believe that every third console you see at the concert, club, auditorium or stadium would be manufactured by Midas.’

Details of the demo sessions are available from NMK. 

More: www.nmkelectronics.com


The South Moravian town of Znojmo in the Czech Republic has recently seen two of its sports facilities equipped with audio systems based around Community loudspeakers. The Znojmo authorities commissioned Dancefloor to provide audio systems for the 6,000-plus seat Winter Stadium and the nearby Sports Hall.

Znojmo Winter StadiumHome to the Orli Znojmo hockey club, the Winter Stadium is also used for international matches, hockey camps, figure skating training and competitions, skating courses and public skating, but had long suffered from low sound levels and a lack of speech intelligibility. ‘For high intelligibility and overall sound quality we chose Community R.5 12-inch, two-way loudspeakers,’ says Dancefloor MD, Libor Klemenc. ‘Sixteen R.5s were required and we used a combination of 60° x 60° and 90° x 40° versions to give us perfect coverage. The R.5 is compact and discreet, and is ideal for the environmental conditions of an ice venue.

‘With an MC2 Audio Ti1048 integrated audio management system providing delay and equalisation, and the audio dynamics maintained by four MC2 Audio T1500 amplifiers, we achieved excellent speech intelligibility, which was a primary requirement of the venue.’

Multipurpose use of the venue was also an important factor, which has also been addressed in Dancefloor’s system design. Via the menu on the processor, an operator can choose from preset modes according to the event – hockey match, public skating, training, social event and so on.

The system can additionally be controlled from two separate locations – main events and hockey games are operated from the main control booth using a Dateq Onyx mixer, while public skating, skating courses and other social events can be controlled rink-side from the penalty timekeeper box using a Cortex Mix-R1U mixer. The system also provides control from both locations simultaneously as, for example, may be required during a hockey game where the main booth is used by commentators and the penalty box for reporting penalties. Additionally, a Shure SLX24E/SM58-P handheld wireless system enables live commentary to be made from any location in the stadium.

Znojmo Winter StadiumThe Znojmo Sports Hall, meanwhile, is a used mainly for basketball, floorball, futsal, handball and rhythmic gymnastics clubs. ‘With the Winter Stadium system so highly rated by its operators and visitors alike, we used the same basic formula for the Sports Hall, but designed it to precisely meet the use, layout and acoustics of the venue,’ Klemenc says.

Here, Dancefloor used a combination of Community R.5 and R.25 loudspeakers, both with 90° x 40° dispersion. A Community dSPEC226 Networked Loudspeaker Processor provides delay and equalisation and MC2 Audio T1500 and T1000 amplifiers are used to power the Community loudspeakers. The combination again provided the high intelligibility and dynamic audio quality the venue required.

As with the Winter Stadium, Dancefloor provided presets on the dSPEC226 to enable the operator to simply select the mode required for the event, including match, training or social event. The audio system is also controlled via a Dateq Onyx mixer from the timekeeper’s location, with a Shure SLX24E/SM58-P handheld wireless system enabling live commentary from any location in the hall.

Dancefloor employed acoustic CAD modelling for both venues to verify the designs before tender and both installations were completed to the highest standards using Klotz cables and Neutrik connectors. Entertainment requirements in both venues are met with Gemini CDMP-1400 CD/MP3/USB players.

‘The new systems have transformed both venues,’ Klemenc reports. ‘The audio is loud and clear throughout, so that operators and commentators can focus on content and spectators can enjoy much greater involvement.’


With a deadline dictated by an imminent visit from the Duke and Duchess of Cambridge, Sydney’s St Andrew’s Cathedral witnessed a fury of activity from staff from Wizard Projects and the Technical Audio Group, who were charged with installing a 140-element Martin Audio OmniLine system into the oldest cathedral in Australia.

St Andrew’s CathedralOne of the city’s finest examples of Gothic Revival architecture, the cathedral interior has particularly long reverberation times making clarity and evenness of coverage across the congregation a constant issue. And having previously struggled with a sound system that failed to deliver clear speech intelligibility or live music reproduction, the installation of the new system reached emergency status.

Ross Cobb, Director of Music at St Andrew’s, and Canon Chris Allan were given the job of raising tenders for design, installation and commissioning of a state of the art system with absolutely no compromise in sound quality – to be fulfilled in just two weeks. The task was awarded to Wizard Projects, led by senior engineer Michael Sheldrick with an electro acoustic design team of Glenn Leembruggen and David Gilfillan – the final piece in the jigsaw was the Martin Audio OmniLine micro line array.

St Andrews

Having heard OmniLine in similar church installations, Cobb was impressed not only with the consistent coverage and fidelity, but also its minimal aesthetic impact.

The team identified a number of key design issues, including the long reverberation time, sub bass placement and beam steering. The unusual logistics of church services involves a 360° presentation from the pulpit, a centre transept area where choirs and clergy require sound reinforcement and a church where the congregation could sit anywhere at any service and expect perfect sound. On top of that, priests would move through the nave on headset radio mics with open mics for Q&A sessions.

Wizard’s design solution was an unprecedented 140 OmniLine elements (distributed over 22 hangs) along with six Martin Audio AQ212 dual 12-inch sub bass. Not only was the quantity of elements enormous but so was the DSP control. Having used OmniLine in other reverberant environments they recognised that a unique aspect of the system is that not only can it be mechanically arrayed and aimed when used in passive mode but it can also be deployed in an MLA [Multicellular Loudspeaker Array] active configuration.

In MLA mode, each element in the array is separately amplified and processed using FIR filters, based on custom software. This enables the system to not only be mechanically and electronically steered but allows consistent frequency response throughout the listening area – without the lobing associated with straight columns. OmniLine is used in a combination of active arrays for the critical areas and passive hangs for spot fill, distributed across 60 channels of 200W/channel amplifiers.

St Andrews Cathedral

The main Western Nave arrays comprise two banks of 12 active OmniLines with a further two banks of ten active arrays for the outer north west pews, while the Eastern Nave comprises two banks of eight active elements with a further four positions of six active OmniLine for the centre of the transept.

The sub bass system is floor mounted in two banks of three AQ212 with separate amplification and processing for each cabinet, which enables the low frequencies to be electronically steered. ‘Because OmniLine has such an extended and usable frequency response to 75Hz the spectral balance between arrays and subs is even and consistent – a feature not normally associated with compact array and large bass system,’ says TAG Technical Director, Anthony Russo.

TAG also recommended advanced DSP and enable the church to control the system with iPads, using custom designed GUI screens for simple services, or interfacing with the mixer and digital stage box for full-scale services. Other design features enable the pulpit’s local OmniLine – mounted a mere 500mm above – to be ramped down, panned and re-EQed to its opposite partner array via the use of an under-carpet pressure mat whenever a priest uses the pulpit with a live mic. OmniLine’s smooth response is such that only 6dB reduction was required to achieve the pass mark required for gain before feedback criteria.

‘OmniLine amazes every time we use it,’ says Glenn Leembruggen. ‘The CAD and filtering predictions are absolutely usable; it’s an amazing engineering feat; there is nothing I have ever worked with that comes close to this product.’

More: www.tag.com.au 
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