Overview The Sennheiser 509618 is a stereo transmitter designed to provide clear and dependable audio transmission for live performances, theater productions, and rehearsals. It operates within a frequency range of 516 to 558 MHz, offering a wide bandwidth of 42 MHz and 1680 selectable frequencies to minimize interference in crowded radio environments. Housed in a durable half-rack metal chassis, it features a bright OLED display for easy navigation and precise control over settings such as frequency and monitoring options. This transmitter integrates seamlessly with Sennheiser’s Evolution G4 wireless systems and supports up to 16 compatible channels. Infrared synchronization simplifies pairing with receivers, while two balanced XLR-1/4" combo inputs accommodate various audio sources. A 1/4" headphone output allows for real-time monitoring with excellent clarity, making it a versatile choice for professional audio setups. Key features Durable half-rack metal housing designed to withstand the rigors of professional use Bright OLED display that simplifies frequency selection and system monitoring Wide frequency range with 1680 selectable frequencies to avoid interference Infrared synchronization for quick and reliable transmitter-receiver pairing Two balanced XLR-1/4" combo inputs for flexible connection to microphones and instruments 1/4" headphone output enabling real-time audio monitoring during performances Adjustable RF output power up to 50 mW to optimize signal strength for different venue sizes Transmission range up to 100 meters, suitable for medium to large stages and rehearsal spaces Compatibility with Sennheiser WSM software for remote control and frequency coordination Key specs Frequency range: 516 to 558 MHz Bandwidth: 42 MHz Selectable frequencies: 1680 Channels supported: 16 compatible channels RF output power: adjustable up to 50 mW Transmission range: up to 100 meters (300 feet) Inputs: two balanced XLR-1/4" combo connectors Output: 1/4" headphone jack for monitoring Display: bright OLED screen Housing: half-rack metal chassis Connectivity and compatibility This transmitter offers versatile connectivity options with two balanced combo inputs that accept both XLR and 1/4" plugs, making it compatible with a wide range of microphones and instruments. The 1/4" headphone output provides clear audio monitoring, essential for live sound engineers and performers. It works exclusively with Sennheiser’s Evolution G4 wireless systems and supports infrared synchronization to streamline setup and channel management. Integration with the WSM software further enhances compatibility by allowing remote frequency coordination and system control, which is especially useful in complex multi-channel environments. Performance and reliability Built to meet the demands of professional audio environments, this transmitter delivers stable and interference-free audio transmission across a broad frequency range. The adjustable RF output power lets users tailor the signal strength to their venue size and comply with local regulations, ensuring optimal coverage without unnecessary power consumption. Its robust metal housing protects internal components during transport and use, while the OLED display provides clear feedback for quick adjustments. The transmission range of up to 100 meters supports medium to large stage setups, making it a reliable choice for sound engineers and performers who require consistent in-ear monitoring. Ideal uses and environments The Sennheiser 509618 transmitter is well suited to live music performances, theater productions, and rehearsal spaces where clear and stable wireless audio is critical. It fits well in professional touring rigs, fixed installations in venues, and broadcast environments that demand precise frequency management and interference avoidance. Sound engineers managing multiple channels will appreciate the infrared synchronization and WSM software compatibility, which simplify complex setups. Performers who rely on in-ear monitoring will benefit from the transmitter’s reliable range and real-time headphone monitoring capabilities.
