The EM 100 G4-A1 True Diversity Half-Rack Receiver is a high-performance UHF wireless solution designed for professional audio environments that demand consistent signal stability and operational flexibility. Developed as part of the Sennheiser evolution wireless G4 100 Series, the EM 100 G4-A1 is built to support a wide range of live sound, broadcast, and corporate AV installations. Housed in a robust full-metal chassis, it integrates a clear LCD interface, allowing for precise configuration and control in demanding environments. Its true diversity reception architecture ensures enhanced signal reliability, minimising dropouts and interference during operation. Designed with scalability in mind, the receiver supports wireless synchronisation with compatible transmitters via infrared, and allows for fast frequency coordination across multiple receivers using an advanced linking feature. The EM 100 G4-A1 supports up to 20 simultaneous channels and offers a transmission range of up to 100 metres, making it a reliable choice for both fixed and mobile setups. With a bandwidth of up to 42 MHz and access to 1680 fully tunable frequencies, users benefit from greater operational flexibility within the UHF spectrum. The EM 100 G4-A1 is particularly suitable for live events, education spaces, houses of worship, and conference settings where professional-grade wireless audio is required. Its technical consistency, build quality, and integration capabilities position it as a dependable receiver in the field of wireless microphone systems.