The system could be viewed as three separate areas. First, we needed a signal path from the floating stage to the control position onboard the HMS Wellington. From here, we needed to distribute the audio to the speaker pontoons, which were up to 400 meters away on the opposite side of the river. This meant that traditional cable runs were simply not an option. Shure equipped us with a pair of PSM-900 IEM systems to act as a main and backup transmitter. One of the features of the PSM-900 is that you can perform point-to-point link-up with a UHF-R receiver. So at each speaker position, we located an amplifier rack with a Shure UR4D receiver, which gave us the ability to distribute the signal across the site without worrying about cabling. In addition, all of the system controllers could be accessed via a wireless network, which allowed us to position engineers at key listening points with direct control over the system’s gain, EQ, delay and so on.