Sennheiser EW-D EM (R4-9) — Digital Wireless Rack Receiver
EW-D EM (R4-9) Overview
The Sennheiser EW-D EM (R4-9) is a professional digital wireless receiver built for the Evolution Wireless Digital platform, operating in the R4-9 frequency band. Designed in a half-19″ rack-mount form factor, it integrates cleanly into fixed installations, touring racks, and broadcast environments where space efficiency is critical. Compatible with the full range of EW-D handheld and bodypack transmitters, it delivers the reliability and audio quality that audio engineers and system integrators demand. This receiver is well suited for houses of worship, live production, broadcast facilities, and touring applications.
The half-rack format allows two units to occupy a single rack unit when paired with an appropriate rack-mount kit, supporting scalable multi-channel wireless builds without sacrificing valuable rack space.
Key Features
- Evolution Wireless Digital Platform — Compatible with EW-D handheld and bodypack transmitters for a fully integrated digital wireless workflow
- Half-19″ Rack Form Factor — Space-efficient design allows dual-unit rack mounting, ideal for dense multi-channel installations
- R4-9 Frequency Band — Operates in the designated R4-9 band for regional frequency compliance and reliable RF performance
- Digital Wireless Architecture — Delivers consistent audio transmission with the stability and low-latency characteristics of Sennheiser’s EW-D digital platform
- Versatile Transmitter Compatibility — Works with both EW-D handheld and bodypack transmitters, supporting a wide range of microphone and instrument applications
- Professional Installation Ready — Designed for permanent installs, touring racks, and broadcast setups requiring dependable wireless infrastructure
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