Sennheiser EW-D EM Digital Wireless Receiver

Product Overview

The Sennheiser EW-D EM is a single-channel, half-rack digital wireless receiver that anchors EW-D platform deployments — whether as the sole receiver in a single-channel system or as one unit in a multi-channel installation. Sold individually, it is the correct purchase for expanding existing EW-D systems channel by channel, or for single-presenter configurations in conference rooms, houses of worship, and educational environments. Its compact half-rack form factor mounts neatly in standard 19-inch racks alongside other EW-D EM units, and it can also operate freestanding on a tabletop. With 24-bit digital audio, intelligent diversity reception, and Bluetooth-based remote management, it is built to the same professional standard as the wider EW-D ecosystem.

Product Description

The EW-D EM receiver delivers 24-bit digital wireless audio with a 134 dB dynamic range, paired with the EW-D SK bodypack or EW-D SKM-S handheld transmitter. The all-metal half-rack chassis accepts standard 1/2-rack mounting hardware and includes a built-in OLED display for at-a-glance RF status, audio level, and battery monitoring without needing a connected device. An XLR and 6.3mm (1/4-inch) combo output covers both balanced and unbalanced downstream connections, making it compatible with virtually any mixing console, conferencing DSP, or recording interface.

Intelligent diversity reception continuously selects the strongest available signal from two antenna inputs, minimizing dropout risk across room-scale deployments. The EW-D EM connects to the Sennheiser Smart Assist app via Bluetooth, enabling complete remote management of frequency assignment, RF squelch, output level, and transmitter mute — without physical access to the receiver itself. This is particularly valuable in installations where receivers are racked in a closet, equipment room, or elevated position.

The EW-D EM operates across 2,240 equidistantly spaced frequencies within a 56 MHz bandwidth. The intermodulation-free frequency grid means multiple EW-D EM units can be deployed in the same venue without the complex coordination and intermodulation calculations required by older analog systems. The system scales to 90 simultaneous channels, making the EW-D EM a viable long-term platform investment for venues that anticipate future channel expansion.

The receiver is compatible with EW-D SK bodypack and EW-D SKM-S handheld transmitters in matching frequency bands. All three frequency bands (Q1-6, R1-6, R4-9) are available to match regional spectrum licensing. Note: the EW-D EM is not backward-compatible with previous Sennheiser evolution analog wireless transmitters.

Key Features

• Single-Channel, Sold Individually — Ideal for single-presenter systems and for expanding existing EW-D installations one channel at a time.
• 24-Bit Digital Audio — 134 dB dynamic range; clean, compander-free signal path from transmitter to output.
• Half-Rack Form Factor — Fits in standard 19-inch racks (2x EW-D EM per rack unit); also operates freestanding on tabletop.
• Intelligent Diversity Reception — Dual-antenna diversity continuously selects the stronger signal path, minimizing dropouts.
• 2,240 Equidistant Frequencies — 56 MHz bandwidth with intermodulation-free tuning grid; scalable to 90 simultaneous channels.
• OLED Display — At-a-glance RF status, audio level, and transmitter battery readout without app access.
• Bluetooth Remote Management — Full parameter control (frequency, squelch, output level, transmitter mute) from Smart Assist app up to 120 ft away.
• XLR + 6.3mm Combo Output — Balanced and unbalanced outputs compatible with all standard mixing consoles and DSPs.
• Compatible with EW-D SK and SKM-S — Receives from both EW-D bodypack and handheld transmitters in same frequency band.
• Three Frequency Band Options — Q1-6 (470.2–526 MHz), R1-6 (520–576 MHz), R4-9 (552–607.8 MHz).

Typical Applications

• Houses of worship — single or multi-channel EW-D receiver racks for pastor, worship leader, and choir applications
• Corporate conference rooms — single-channel presenter wireless with DSP integration
• Performing arts venues — multi-channel receiver rack deployments for theatrical and live music productions
• University auditoriums and lecture halls — scalable wireless with remote RF management from a tech booth
• Broadcast and livestream studios — clean 24-bit wireless feed to mixing console or audio interface
• Government and municipal meeting rooms — reliable single-channel wireless for council and board room AV systems

Technical Specifications

Frequently Asked Questions

Q: Can I buy additional EW-D EM receivers to expand an existing EW-D system?

Yes. The EW-D EM is sold individually specifically to support channel-by-channel expansion of existing EW-D systems. Each EW-D EM operates as an independent single-channel receiver and can be added alongside existing units in a rack installation.

Q: How many EW-D EM receivers can operate simultaneously in the same venue?

The EW-D system supports up to 90 simultaneous channels using the equidistant frequency grid. This makes it a viable platform for large venues with significant future expansion plans.

Q: Does the EW-D EM work with Sennheiser evolution analog transmitters?

No. The EW-D EM is a digital-only receiver and is not backward-compatible with previous Sennheiser evolution analog wireless transmitters (ew 100, ew 300, ew 500 series). It is only compatible with EW-D platform transmitters.

Q: Can I manage the EW-D EM remotely without physical access to the receiver?

Yes. The Sennheiser Smart Assist app connects to the EW-D EM via Bluetooth (up to 120 ft) and provides full parameter control including frequency assignment, RF squelch, output level, and transmitter mute. This is ideal for rack-mounted receivers in equipment closets or elevated positions.

Q: What outputs does the EW-D EM provide?

The EW-D EM has an XLR balanced output and a 6.3mm (1/4-inch) unbalanced output, covering both professional audio routing to mixing consoles and direct connection to consumer or prosumer equipment.

Q: What transmitters are compatible with the EW-D EM?

The EW-D EM is compatible with the EW-D SK bodypack transmitter and the EW-D SKM-S handheld transmitter, both of which must be in the same frequency band as the receiver.

Q: Can the EW-D EM sit on a tabletop or does it need to be rack-mounted?

The EW-D EM operates in both configurations. It is designed as a half-rack unit and mounts in standard 19-inch racks (two units per rack unit with appropriate mounting hardware). It can also sit freestanding on a tabletop for portable or temporary deployments.

Q: Which frequency band should I order?

The EW-D EM is available in Q1-6 (470.2–526 MHz), R1-6 (520–576 MHz), and R4-9 (552–607.8 MHz). The correct band depends on your local licensed spectrum and existing RF environment. Creation Networks can assist with site RF analysis and band selection prior to purchase.