The EM 100 G4-GB is a professional-grade true diversity half-rack receiver engineered to support high-performance wireless audio transmission across a broad range of professional settings. As part of the Sennheiser evolution wireless G4 100 Series, it is built with a robust full-metal housing and an intuitive LCD interface, providing reliable operation and visibility in live sound, corporate, educational, and broadcast environments. The EM 100 G4-GB enables stable UHF transmission with up to 42 MHz bandwidth and 1680 tunable frequencies, making it suitable for demanding multi-channel configurations. With support for up to twenty compatible channels and a transmission range of up to 100 metres, the receiver meets the needs of medium to large-scale audio installations. Fast and flexible frequency coordination is made possible through infrared synchronisation and a new linking functionality, allowing up to twelve receivers to be efficiently networked. Designed with both technical precision and operational efficiency in mind, the EM 100 G4-GB offers users full control over wireless signal integrity and frequency management. Whether deployed in fixed installations or mobile production setups, it contributes to dependable audio performance and streamlined configuration in professional audio workflows.