L-Acoustics has deployed its L-ISA Immersive Hyperreal Sound technology to deliver a complex multi-genre audio experience during two sold-out nights this summer at Prague’s 15,000 capacity O2 Arena, in the Czech Republic. The system was used for a collaboration between Queen tribute band Queenie and the Janáček Philharmonic Ostrava, aiming to blend stadium rock power with symphonic precision.
The installation featured an object-based audio approach designed to provide spatial separation between the orchestra and rock band elements. Each orchestral section was positioned and amplified to retain its natural timbre and clarity, while Queenie’s rock sound maintained its characteristic punch through dedicated positioning.
Pro Music, L-Acoustics’ Czech certified partner, led the deployment using Soundvision 3D simulation to pre-model the arena acoustics. This allowed the team to optimise speaker coverage and predict the balance needed between the orchestra’s clarity and the rock band’s energy, ensuring a consistent immersive experience across all seats.
The sound system comprised five hangs of 18 K2 line array speakers as the main system, supplemented by two side extensions with 21 Kara II speakers each, and out-fill hangs of 15 Kara II per side. Low-end frequencies were delivered via two centre-flown arrays of 10 KS28 subwoofers, supported by cardioid ground stacks and front-fill arrays.
Processing ran on L-Acoustics’ L-ISA Processor II with a Milan AVB network, amplified partly through flown LA-RAK II units. L-Acoustics application engineers provided on-site technical support throughout the event.
Daniel Krčmář, CEO of Pro Music, said: “Traditional stereo reinforcement would have forced us to choose either the orchestra gets buried under the rock mix, or the rock loses its punch. L-ISA gave us a third option – spatial separation that lets both elements exist at full intensity without compromise.”
He added: “L-ISA allowed us to build layers of sound with clarity and precision. The audience felt the rock energy at its full intensity, but heard the orchestra as an essential performance element, not just background music. That created true audio immersion – that would be impossible with a traditional stereo system.”
