SEA Games goes wireless with help from Mipro
MYANMAR: On December 11th 2013, the 27th Southeast Asian (SEA) Games opening ceremony was held at Wunna Theikdi Sports Stadium in Naypyidaw, Myanmar. With close to 30,000 spectators in attendance, Mipro was handed the task of supplying the venue’s main wireless microphone system for both the opening and closing ceremonies. The audio equipment included wireless microphones, wireless in-ear monitoring systems and a wireless intercom system.
The SEA Games marked the nation's biggest sporting event it had hosted since 1969. Eleven Southeast Asian countries participated at the games with nearly 5000 athletes taking part in 37 sports.
‘All wireless systems are from Mipro. Its latest antenna system delivers superior signal transmission quality, especially in such a large sports field. Reception range and signal stability is the biggest challenge; the shortest distance between the main stage and the mixing console is 150m, while the longest is more than 350m,’ said Mipro senior sound technical consultant Daniel Ku.
There were two groups of wireless microphone system used in the ceremonies. The first contained five ACT-828 dual-channel digital receivers – one of which was reserved as a backup, an AD-707a antenna divider and two AT-90W log antennas. For the actual microphones, two ACT-80H handhelds were used for the masters of ceremonies. Two BC-100 boundary mics, ACT-80T and MM-202 gooseneck microphones for Myanmar’s vice president, and an ACT-80T fitted with an MU-53HN headworn mic for the flag captain. For each microphone, a single channel was reserved as a backup.
The second wireless microphone system contained six ACT-74 quad-channel analogue receivers – one redundant, an AD-707a antenna divider and two AT-90W log antenna. These were supplied by 16 ACT-70H handheld mics for the programme presenters, the chairman of the Myanmar Olympic committee and selected performers.
In such a large event, it is very important for the programme presenters, singers, and all the thousands of performers to monitor the music and receive relevant instructions synchronically. For this reason Mipro’s wireless IEM system played a very important role. The event used eight monitor channels feeding to eight MI-808T transmitters. To avoid interference, four of the transmitters’ output signals were integrated into one via an AD-808 antenna combiner.
Due to the wide range of the performances, the original 100mW output power of the MI-808T was unable to cover the range, so the AD-808 was connected to an AD-90A high power amplifier to boost the output power to 1W. Additionally, in order to accommodate such a large number of performers, the sound engineers used an AT-100 circularly polarised directional antenna, effectively reducing the polarisation loss of the antenna to obtain optimal signal quality throughout the venue. This allowed more than 400 sets of monitoring receivers and earphones to be used for all performers.
‘Mipro wireless microphones and antenna systems proved to be the ideal combination, achieving a problem free performance with excellent sound quality and stable reception,’ Mr Ku commented. ‘All the sound team members were very satisfied with the result!’