Evolution diversity wireless receiver A 518-554Mhz C 740-776Mhz Sennheiser EM 300 G2 True Diversity Receiver With the evolution wireless series ew 300 G2, Sennheiser offers musicians, video and sound amateurs high-quality state-of-the-art RF transmission systems with a high level of operational reliability and ease of use. Transmitters and receivers permit wireless transmission with studio-quality sound. The excellent transmission reliability of the ew 300 G2 series is based on the use of further optimized PLL synthesizer and microprocessor technology, the HDX noise reduction system, the pilot tone squelch control, the true diversity technology (rack-mount receiver only), and the scan function for scanning the channel banks for free channels.