Sennheiser EW-D ME4 Wireless Handheld Microphone System (R4-9: 552-607 MHz)

The Sennheiser EW-D ME4 SET with ME 4 Cardioid Lavalier delivers pristine 24-bit digital audio, a remarkable 134 dB dynamic range, an equidistant tuning grid, and convenient Bluetooth setup through the Smart Assist App, providing a professional rackmount wireless microphone system designed for ease of use. Though simple to operate, its advanced feature set meets the needs of both new and experienced users, including lecturers and presenters in business or education, clergy in worship spaces, and performers on stage in theaters or music venues. The ultrawide dynamic range eliminates the need for transmitter sensitivity adjustments, while the equidistant tuning grid avoids frequency coordination issues and supports up to 90 simultaneous channels. UHF transmission extends range to 330 feet, and the broad 56 MHz bandwidth gives access to 2240 selectable frequencies. Intelligent Switching Diversity guards against RF interference, and latency as low as 1.9 ms keeps performance natural and seamless. With Bluetooth integration, pairing and remote operation through a mobile device is fast and intuitive, while the system automatically manages levels and ensures a clean, stable signal within seconds.

This configuration includes the EW-D EM single-channel receiver, the discreet ME 4 cardioid lavalier designed for clear speech, and the durable EW-D SK bodypack transmitter built in a lightweight metal housing to withstand everyday stage use. The transmitter can be paired with the receiver via Bluetooth Low Energy from up to 120 feet away, removing the need to move equipment for setup. Power is supplied by either two AA batteries for up to eight hours of runtime or the BA 70 rechargeable lithium-ion pack, which extends operation to twelve hours when used with the optional L70 USB dual-charger. The EW-D EM half-rack receiver, featuring removable antennas, is enclosed in a rugged all-metal chassis for long-term reliability and can be placed on a tabletop or rackmounted for permanent or portable systems. A high-contrast OLED screen with a simplified menu system and Escape button allows quick navigation, and the auto-scan function automatically locates the clearest available frequency. Users also have the option of full control from their iOS or Android device within a 120-foot Bluetooth range via the Smart Assist App. The EW-D is not backward-compatible with earlier analog systems.

The transmitter's ultrawide 134 dB dynamic range allows for worry-free handling of loud singers, instruments, or line-level sources without adjustments, producing excellent signal-to-noise performance and accurate transient response for detailed, clear sound. Its flat 20 Hz to 20 kHz frequency response and 24-bit audio reproduction maintain professional fidelity, while the nearly undetectable 1.9 ms latency helps musicians and speakers perform without disruption. The ME 4 lavalier uses a cardioid pickup pattern to reduce unwanted background noise, making it effective in busy or noisy environments, and locks securely to the 3.5 mm input on the compact transmitter. Built from metal, the transmitter includes a mute button with lockout and remote override functionality, pairing easily at the press of a button from up to 120 feet away. The receiver offers intuitive front controls, an OLED screen showing RF levels, transmitter battery life, and audio output, as well as auto-scan for frequency selection. It provides balanced XLR and unbalanced quarter-inch outputs for easy integration into PA systems or mixers. The detachable antennas can be upgraded to improve RF performance, and a rackmount kit with a universal power supply is included.

The system employs an equidistant tuning grid, a technology once exclusive to Sennheiser's flagship series, which evenly spaces 2240 frequencies across the 56 MHz spectrum to prevent intermodulation issues when multiple transmitters operate nearby. This design supports high channel counts and reliable operation in crowded RF environments. Intelligent Switching Diversity further enhances stability by comparing signals from dual antennas and switching seamlessly without affecting audio quality. Operating in the UHF band ensures a more stable signal, away from interference found in 2.4 GHz Wi-Fi. The Smart Assist App gives users quick access to automated setup, frequency allocation, muting, battery monitoring, and channel labeling, as well as centralized management when using multiple systems. It can handle up to sixteen mic channels per device, with additional devices used for larger systems. A built-in support hub with guides and tutorials simplifies setup and use. For improved reliability, antennas can be front-mounted with the optional kit or upgraded to remote passive or directional models for better coverage, while the EW-D ASA active splitter allows larger systems to share antennas and power for reduced clutter.

The EW-D system also supports expansion with a wide range of microphones and transmitters. Subminiature lavaliers such as the MKE 2 deliver broadcast-quality sound, while the ME 2 omnidirectional lavalier offers forgiving pickup, and the ME 3 headset provides strong clarity for presentations. Vocalists and presenters may prefer the handheld EW-D SKM-S transmitter, compatible with several Sennheiser capsules, and instrumentalists can connect via the CI 1 instrument cable for guitar, bass, or keyboard. With its combination of versatility, durability, and cutting-edge wireless reliability, the EW-D ME4 SET is designed to meet the demands of professionals across a wide spectrum of live performance, presentation, and production environments.