In a stadium-type space, the interacting sound waves of individual acoustic systems must reach the listener simultaneously, thus improving overall speech intelligibility – STI (Speech Transmission Index). Audiotonas engineers have programmed two different delay line scenarios that the system operator can change with the touch of a button. A total power of 96 kW feeds the 32 RCF P 5228-L speakers in clusters of 4 modules each, installed evenly along the entire perimeter of the stadium. RCF P 1108-T speakers in additional 78 delayed sound lines provide coverage for the lower ring of the stands. Four units of extremely high-power speaker systems, RCF HL Series, are installed for the playing field coverage. RCF AYRA studio monitors serve the sound operator at the console position.
The frequency characteristics of all speaker systems were measured under real conditions using specialized measuring microphones and software. The characteristics of the sound have been adjusted to eliminate unwanted resonant frequencies due to the stadium's acoustic environment. This allowed, not only to obtain the best possible sound quality, but to achieve the same tonal balance between various speaker types. Audiotonas' team measured the sound pressures on the pitch, at the stands, the upper and lower rings, providing perfect coverage and avoiding excessive sound pressure to the audience – while maintaining ideal intelligibility. The sound system of the Darius and Girėnas Stadium is one of the most powerful, complex, and large-scale systems ever installed in Lithuania.
In addition to the entertainment sound system, the stadium is equipped with a separate fire alarm and evacuation system, divided into 29 sound zones. This system also provides background music and commercial messages to the common areas. The system meets the strict standards of EN54 requirements, ensuring clear and comprehensible audibility of messages with fire-resistant cabinets and cables. The EVAC system combines more than 500 RCF speakers.