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Uppsala Cathedral is Ready for Every Scenario With 40 Iconyx Columns
Posted on Monday, January 30, 2017


Uppsala, Sweden | January, 2017 - Sweden's Uppsala Cathedral is one of the oldest houses of worship in Europe, not to mention the tallest in Scandinavia. World-renowned for its architecture and history, the Cathedral was once the burial place of Swedish royalty, and is now home not just to a devoted congregation, but uniquely historical items such as Queen Margareta's golden dress – the world's only preserved evening gown from the Middle Ages. 

The Cathedral is a protected structure, and since 2010, Viktor Wadelius of Swedish systems integration specialist Svensk Klimatstyrning AB, has worked to update the building's technical infrastructure without harming the ancient stonework. His efforts have led the rejuvenation of systems as diverse as heating and ventilation through to architectural lighting. When it came to investigating more effective sound reinforcement, only Renkus-Heinz Iconyx offered the combination of control and quality required to handle the Cathedral's challenging acoustic environment.

"It's a very personal project," explains Wadelius. "I've worked with the Cathedral on every electrical element. It means a lot to me that everything is right. It's the biggest cathedral in Sweden and I also grew up in Uppsala, so it's a big part of who I am."

Yet as difficult as it is to install any electrical system into a protected structure, it takes a special kind of expertise to find the right audio solution for an environment as reverberant as a cathedral. Adding to the task, meanwhile, was the manner of services conducted within Uppsala.

"The Cathedral is very big, and one of its unique characteristics is that during the services, the priests move around a lot," Wadelius continues. "They start in the middle of the cathedral, at the central pulpit, and then head up to the high altar, then back to the pulpit, and so on. One service will take place across many locations – we call them scenarios. It's unusual to have to create a speaker system for this kind of environment."

In the past, attempts had been made to find a suitable sound reinforcement system, with only limited success – while one attempt might deliver heightened intelligibility, coverage would then become an issue. Nevertheless, determined that it should be possible to properly cover the entire congregation with high quality, intelligible audio, Wadelius and his team went searching for an answer.

"We headed out into Europe to visit the big cathedrals and find out what they were using to solve similar problems, to see what they had chosen," he explains. "We went to Cologne, Germany, and they had Renkus-Heinz, and we went to Lund, here in Sweden, and they had Renkus-Heinz, and we went to Trondheim, in Norway, and they also had Renkus-Heinz! They were all happy with their sound systems. So then we made contact through the Renkus-Heinz distributor, Benum Sweden AB, and everything went well from there."

"We were invited to Uppsala to perform a demonstration," continues Renkus Heinz Regional Sales Manager Håkan Sjoo. "It was immediately clear that this was a very interesting project. It's a large cathedral and very important within Sweden, hosting a number of concerts with a large choir as well as regular services. It's a truly beautiful building."

Considering the impressive scale of the solution that was eventually installed within the Cathedral, it's remarkable that the original demonstration comprised of just one loudspeaker array – an Iconyx IC32, which was located at the central altar. "From the altar to the rear of the seating, it's approximately 40m (131 feet) – quite a long way!" continues Sjoo. "But even with only one column, the difference was clear. They asked if the difference was because we were using pre-recorded tracks as a source, so we also had a number of priests test the system, and they were happy."

But even with the impressive early results, it was clear that only a particularly ambitious design would be enough to meet the needs of the Cathedral. 

"Originally, the concept was based around a priest delivering a sermon from the central altar, and that was it – all of the sound was coming from that position," says Sjoo. "But there are at least four different points of focus even for regular services plus special areas such as the rear of the building, where baptisms take place, and the Cathedral's magnificent pipe organ. From an audio point of view, that's very complicated. The system needed to be able to cover every area equally, and at a very high quality. It meant creating one of the largest Iconyx installations in Europe, with 40 individual loudspeaker arrays."

"The Cathedral wanted the best possible audio system which would sound just as good no matter where you were seated," declares Wadelius. "The people working in the Cathedral always say that Uppsala Cathedral should be the best and should always get the best – they didn't even think about anything else other than the best possible solution."

In total, Uppsala Cathedral is served by 22 IC16-8 columns, plus eight IC8 arrays, five IC24 columns, four ICX7 arrays and a single IC32. The achievement is all the more striking when you consider that the installation represented to the first use of Renkus-Heinz's Iconyx Gen5 presets.

"It's very unusual to have 40 line arrays inside one cathedral," acknowledges Michal Poplawski, Renkus-Heinz Technical Sales Manager, Europe, who joined the project as it was already underway. "Common wisdom says that it's not good – when you have difficult acoustics and many sources, you will have a problem." Yet the beam steering expertise embedded deep into the DNA of Iconyx Gen5 ensures that every loudspeaker in the room maintains delicate control over the acoustic energy. In addition, an innovative network tied a show control system means that the Cathedral's technical team can select which parts of the system are live at any one time, depending on the service taking place.

"We have many sources, but most of them, certainly more than half, are inactive in each scenario," adds Poplawski. "We needed all of them to build all of the different scenarios."

Nor has the structure of the Cathedral been affected, thanks to the expertise of Viktor Wadelius and an ingenious clamp. "We have to get permission to do anything inside a cathedral that is this old," he reasons. 

"So we came up with a special clamp that we could use to mount lights and loudspeakers without having to do any drilling. If the cathedral needs to be returned to its original state then they can just remove the clamps and there will have been no effect. Both the clamps and the loudspeakers are painted in the same colour as the columns, and so they blend in very nicely. The entire installation is very discreet."

Crucially, the system has delivered the audio quality and coverage that the Cathedral sought for so long.