092 VENUE
Olympic Stadium Kiev
different loudspeaker series. So we have the EVA as installation line array, we have the EVF - front loaded direct radiating speakers - EVH that we have here in the stadia, EV horn loaded series, and last but not least, last year at PLASA we launched the EVU – EV ultra- compact. All these speakers form a family, or you could say, work as building blocks. “For example, the EVH is available, as standard, in black, in white, in indoor version or outdoor version, even in fibreglass for a real outdoor thing where there isn’t a roof. And now we come to the acoustical things... you can choose between nominal coverage, angles from 40° by 30° to 90° by 90°. You have all angles in between. You can choose within a series, the perfect fit for the individual project and installation. That’s the same for the EVF, EVH, and you can make a choice of what fits best for your project. It is a very comprehensive programme which has been developed over the last three years.” Over the last decade particularly, EVI Audio has built a formidable reputation in sports environments. The company’s systems were installed into 20 of the 22 arenas used during the 2004 Athens Olympics, it enjoyed success at the 2006 World Cup in Germany and secured nine out of the 10 stadia used for the 2010 World Cup in South Africa. In Kiev, the acoustic calculations were made by Sound House Pro using EASE software. The set-up and fine tuning of the sound
Olympic Stadium Kiev
reinforcement was carried out using Electro-Voice’s hardware and software platform, IRIS-Net. Sound House Pro worked with EVI Audio’s Dieter Kellner and Vytautas Valancius on this part of the project, combining human expertise with mechanical adroitness. The main system comprises 80 Electro-Voice EVH-1152S/66-PIB 2-way horn loaded coaxial loudspeakers, which offer wide bandwidth directivity control and excellent efficiency. Each cabinet utilises an ND2B and an SMX2151. The ND2B is a high output 2-inch titanium compression driver, coupled to a rotatable 12-inch by 12- inch constant directivity 60° x 60° waveguide. The new SMX2151 is a high output, low distortion 15-inch woofer. Developed by EV engineering the motor, suspension, and electrical characteristics of the woofer are optimised to maximise efficiency and minimise distortion. The passive crossover network employs 24dB / octave slopes for a smooth response in the vocal range, linear off-axis response, and features a comprehensive protection circuit for long term reliability. This combination of technologies results in a smooth response to 16kHz and excellent pattern control down to 500Hz. Additional bass reinforcement for the system comes from 80 Electro-Voice EVF-1181S-PIBs. The front-loaded subwoofers use the EVS18SB 18-inch woofer with FEA optimisation for motor, suspension, and electrical design for very low distortion and maximum intelligibility at high SPL levels. A total of 126 Electro-Voice EVID 6.2T speakers have been used in peripheral zones, such as behind and underneath the seating. And eight Electro-Voice Xi-2122MHA loudspeakers supply sound to the playing field. While the speaker elements of the audio system didn’t offer too many difficulties, implementing the cabling system that would carry the signals wasn’t so straightforward. Garkaviy revealed: “The first and most challenging issue was with the cable length. Because the cable runs are very big. The second thing is, the loudspeaker cables run together with the power cables for the lighting, which are very powerful. We couldn’t actually influence on these things, which are absolutely wrong according to the physical laws. Unfortunately, we couldn’t influence the construction because it was the decision of the designers.” To answer this predicament, Sound House Pro turned to Klotz Audio Interface Systems (Klotz a.i.s). Together, the two companies designed two new types of cable, which could overcome the high levels of interference generated by the power cables. The Klotz LSB2160P and LSB4160P are purpose-designed speaker cables with exceptionally large cross-sections (4 x 16 sq mm and 2 x 16 sq mm) delivering extremely low line losses in PA system operation. The cables have extremely dense braided screens with 85% coverage to
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