Officially opened in Summer 2022, the LKH Arena in Lüneburg, Germany is a municipally owned 3500-seat indoor venue that provides a new home for the city’s SVG Lüneburg Bundesliga volleyball team, as well as a venue for music and entertainment events.
With one of Germany’s leading AV technology specialists on their doorstep, district administrators turned to Lüneburg-based Protones, a full-service installation and live events company with decades of experience, along with Hanover-based acoustic consultants AiR Engineering, to discuss the sound system.
Existing designs were revised using NEXO speakers, and a significant cost saving immediately became apparent.
“We’ve undertaken a number of installations with NEXO and the results are always really good” reports Protones Managing Director Benjamin Schulenkorf. “At the LKH Arena, we were able to supplement the main PA clusters of 48 NEXO GEO S12s with 28 ID24s under the balconies.
“The ID24 has a massive output for such a small speaker and helped to achieve uniform SPL coverage throughout the venue, and NEXO NXAMP powered controllers gave us a truly plug and play solution for networked amplification and processing. What’s more, we can use the installed system for delays when we bring in mobile FOH systems for music events.”
Although fairly conventional and straightforward in its design, the LKH Arena required an unusual configuration and location of subs, as NEXO’s Head of Engineering Support François Deffarges explains. “We originally thought of implementing LS18 subwoofers in distributed arrays but this proved to be impractical, not just because it lowered the GEO S12 clusters below their optimum height, but also because it exhibited significant interference patterns.
“So we then investigated the central cluster option: omnidirectional, cardioid, low frequency lobe downwards or straight, along the width or the length of the venue. Ultimately, the solution we opted for was 2 X LS18 clusters back-to-back along the width of the venue, cardioid lobe downwards, giving a +/-2 dB deviation from 30 Hz to 85 Hz over the entire venue. And by properly time aligning each GEO S12 cluster to the venue central point, we kept the coherency in the cross-over region at its best, for all seats in the venue.”
Working in close collaboration with the NEXO Engineering Support team, Protones Project Manager Eike Brameier and System Designer Arne Sumfleth were able to model the performance of the system using NEXO’s NS-1 software configuration and simulation tool, simultaneously generating the necessary reports for dimensions, weight, gravity centre position, forces, moments, working load and safety factors.