Sennheiser EW-d CI1 Set (552 - 608 MHZ)

Evolution Wireless Digital: the "Evolution" spirit goes digital

With Evolution Wireless Digital, Sennheiser offers a modern approach to wireless: a modular system designed for professional use, featuring direct handling and more confident frequency management. The goal is clear: to provide access to a robust digital experience inspired by high-end solutions, while maintaining ergonomics suited for field use.

For stage, conference, video, and all situations where voice intelligibility is essential

The EW-D ME4 Set is aimed at singers, speakers, actors, presenters, and technicians who want a discreet lavalier microphone and reliable transmission. The cardioid pattern of the ME 4 helps keep the voice present even in noisy environments by reducing ambient noise and potential feedback.

UHF reliability, wide dynamic range, and scalability: a system designed for RF fleets

The digital UHF transmission improves range and stability while remaining scalable for multi-system configurations. The EW-D family features a constant-interval frequency grid designed to simplify setup and reduce coordination constraints. The system can scale very high in capacity, with a wide 56 MHz bandwidth allowing up to 90 channels depending on conditions. In terms of performance, the 134 dB dynamic range (transmitters) preserves the details of an expressive voice, from whispers to the most powerful passages, without abrupt clipping. For power, the system is compatible with lithium-ion batteries (up to 12 hours) or AA batteries (up to 8 hours), convenient for touring or occasional use.

Technical specifications

Category	Complete system	Frequency band	R4-9 – 552 à 608 MHz
Number of channels	90	Color	Black

Type	all-in-one wireless digital lavalier microphone system for voice	Configuration	automated procedure for establishing reliable connections
Series	Sennheiser Evolution Wireless Digital (EW-D)	Frequency capacity	up to 2,240 frequencies
Included microphone	Sennheiser ME 4 clip-on	System capacity	up to 24 wireless systems per frequency range
Microphone technology	electret, condenser	Bandwidth per range	56 MHz
Microphone directivity	cardioid	Possible number of channels	up to 90 channels
Transmission	digital wireless	Dynamic range	134 dB (transmitters)
Radio band	UHF	Battery life	up to 12 hours with lithium-ion battery, up to 8 hours with AA batteries
Receiver	EW-D EM single-channel, rack-mountable	Frequency ranges mentioned	552 - 608 MHz ; 520 - 576 MHz ; Q1-6 (470.2 - 526 MHz)
Transmitter	EW-D SK (bodypack transmitter)	Contents	1 EW-D SK bodypack transmitter, 1 ME 4 lavalier microphone, 1 EW-D EM receiver, 1 rack kit, 1 NT 12-5 CW+ power supply with country adapters, 1 set of AA batteries
Control	Bluetooth Low Energy, compatible with Smart Assist app (iOS and Android)