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Sennheiser EW-D EM Digital Wireless Receiver (R4-9: 552 to 607 MHz)

BH #SEEWDEMR49 • MFR #EW-D EM (R4-9)
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Sennheiser EW-D EM Digital Wireless Receiver (R4-9: 552 to 607 MHz)
Key Features
  • For Medium-Sized Venue & Conference Room
  • Pro Features with Fast & Easy Set Up
  • Single-Channel, 1/2 Rackspace
  • Intelligent Diversity Reception
The Sennheiser EW-D EM is a half-rack, single-channel wireless receiver housed in a rugged, all-metal chassis built to withstand the rigors of professional use. It can either sit on a tabletop or be rackmounted for portable rigs and permanent A/V installs.
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Sennheiser EW-D EM Overview

The Sennheiser EW-D EM is a half-rack, single-channel wireless receiver housed in a rugged, all-metal chassis built to withstand the rigors of professional use. It can either sit on a tabletop or be rackmounted for portable rigs and permanent A/V installs.

The EW-D EM is compatible with the EW-D SK bodypack and EW-D SKM-S handheld transmitters. Easy to set up and simple to operate with a bright OLED display and automated Bluetooth App for your phone, it offers pristine 24-bit digital audio and reliable wireless performance to presenters and lecturers working in business and educational settings, clergy in houses of worship, and live performers in theaters or on medium-sized musical stages.

Note: The EW-D EM digital receiver is NOT backward-compatible with previous evolution analog systems.

Reliable Wireless Performance with Equidistant Tuning Grid
  • Based on the company's higher-end Digital 6000/9000 wireless systems, the equidistant tuning grid removes the need for frequency coordination and enables you to operate up to 90 mic channels simultaneously. The UHF transmission greatly enhances range (up to 330') and the wide 56 MHz bandwidth gives you the ability to find a clean channel from 2240 available frequencies.
  • Intelligent Switching Diversity offers effective protection against multipath and other anomalies that cause RF interference. The system compares incoming signals on two independent antennas and receiver circuits to ensure optimal wireless quality. The receiver switches between antennas only during header data as to never affect the audio information.
  • The EW-D EM operates in the UHF band, far away from potential Wi-Fi interference in the 2.4 GHz band.
Easy-to-Use Receiver with Fast and Intuitive Interface
  • The EW-D EM receiver offers intuitive front-panel controls and a high-contrast OLED with meters for RF, battery status of the associated transmitter, and audio output that make setup a breeze.
  • The auto-scan function automatically seeks out the cleanest available frequency for you.
  • The receiver pairs with the transmitter via Bluetooth Low Energy from up to 120' away, enabling you to quickly pair the mic directly from the stage without having to bring it close to the receiver.
  • The back panel houses a balanced XLR output and an unbalanced 1/4" output for direct connection to any PA system or mixing board.
  • The two detachable 1/4-wave dipole antennas on the back of the unit can be upgraded for improved RF performance.
  • The unit comes with a kit for rackmount installation and a universal power supply with EU, US, and UK adapters.
Control from Your Phone with Smart Assist App-No Wireless Expertise Required
  • With the Smart Assist App (free download available separately) installed on your Android/iOS phone/tablet, the power of Bluetooth Low Energy connectivity puts full control of the EW-D EM right in the palm of your hand. Use your mobile device to connect via Bluetooth for efficient operation and monitoring of your system—with no wireless expertise required.
  • Take advantage of a remarkably fast automated setup of receivers and transmitters, automatic and manual frequency allocation, muting, battery status, and channel naming to help keep systems organized—all only one tap away.
  • Aside from instant access to all system settings, there is also a support hub with video tutorials and detailed manuals to help get you started.
  • When working with multiple systems, the App provides access to all system settings, centralizing control, and eliminating the need for complicated menu navigation on each device. Wireless channel naming helps to keep systems organized.
  • Up to 16 mic channels can be handled remotely via a single mobile device. Additional channels can be controlled via additional phone/tablets with a maximum of 16 channels per device.
  • If your phone is not available, you can fully operate your system using the buttons on the receiver.
Maximize the Wireless Reliability of Your Receiver
  • The rear-mounted, 1/4-wave detachable antennas can be upgraded to longer, 1/2-wave dipole antennas (available separately) for added range and reliability.
  • Antennas may not perform optimally when rear-mounted inside a metal equipment rack. Using the AM 2 antenna front-mount kit (available separately) gives you the option to mount the two antennas on the front of your rack, maintaining line-of-sight between the receiving and transmitting antennas for even greater connection reliability—this option is available only when mounting just one EW-D EM receiver per 1 RU rackspace.
  • Adding the ADP UHF passive/directional remote antennas (available separately) to your system enables you to position the antennas closer to your transmitter and orient them for maximum coverage, achieving professional-quality RF signal reliability with virtually no dropouts.
  • For larger, multi-receiver systems, the EW-D ASA active antenna splitter (available separately) splits the signals from the two antennas (now connected to its rear panel), delivering the RF signals to up to four receivers in a rack. The Unit also provides DC power to the four receivers, for less clutter in your rack.
UPC: 615104336766

Sennheiser EW-D EM Specs

Key Specs
Wireless Technology
Digital UHF
Diversity
Yes
Max Operating Range
328.1' / 100 m (Line of Sight)
Receiver Type
1x Tabletop/Rack-Mountable
Number of Audio Channels
1
Included Transmitters
No Transmitters Included
Microphone Type
No Microphone Included
Included Charging Case
No
System
Wireless Technology
Digital UHF
Diversity
Yes
RF Frequency Band
552 to 607 MHz
Number of RF Channel Frequencies
2240
Max Operating Range
328.1' / 100 m (Line of Sight)
Max Transmitters per Band
90
Dynamic Range
134 dB
Latency
1.9 ms
Encryption
No
Built-In Recorder
No
Timecode Support
No
Mobile App Compatible
Yes: Android & iOS
App Name: Smart Assist
Functionality: Adjust Settings, Remote Control, Setup
Receiver
Receiver Type
1x Tabletop/Rack-Mountable
Mounting Options
Rackmount (with Included Hardware, 1 U Half-Rack)
Antenna
2x Removable
Number of Audio Channels
1
Audio I/O
1x XLR 3-Pin Balanced Output
1x 1/4" TRS Balanced/Unbalanced Output  
Word Clock I/O
No
Gain Range
-3 to +42 dB (3 dB Steps)
Frequency Response
20 Hz to 20 kHz ±3 dB
Display
LCD (Non-Backlit)
Power Requirements
AC/DC Power Adapter
Transmitters
Included Transmitters
No Transmitters Included
Microphones
Microphone Type
No Microphone Included
Power
Included Charging Case
No
Charging Case
AC/DC Power Adapter
11 to 13 VDC at 300 mA (Included)
Input Power
100 to 240 VAC, 50 / 60 Hz
Physical
Environmental Resistance
No
Dimensions
8.3 x 7.4 x 1.7" / 212 x 189 x 44 mm
Weight
35.3 oz / 1000 g (without Antennas)
Packaging Info
Package Weight
5.475 lb
Box Dimensions (LxWxH)
15.9 x 13.7 x 3"

Sennheiser EW-D EM Reviews

Top Wireless System in My Opinion

By Peter
Rated 5 out of 5
Date: 2025-09-25

I absolutely love this receiver. Setup was quick and intuitive, the signal is rock-solid, and the audio quality is crystal clear with zero noticeable latency. The digital transmission makes a big difference — no dropouts or interference issues, even in crowded RF environments. The build quality feels professional and durable, and the frequency range (552–607 MHz) gives plenty of flexibility for different venues. Pairing it with my mics was seamless, and the battery life on the system is excellent. If you’re looking for a reliable, high-quality wireless solution for live events, DJ work, or production, the EW-D EM delivers exactly what you’d expect from Sennheiser: top-notch performance. Couldn’t be happier with this purchase!

See any errors on this page?

Can you cascade two receivers in order for them ...

Can you cascade two receivers in order for them to share 2 antennas?
Asked by: Keene
To share antennas with two or more Sennheiser EW-D EM Digital Wireless Receivers, Sennheiser recommends using the EW-D ASA 4-Way Active Antenna Splitter with DC Distribution for EW-D Wireless Systems (B&H # SEEWDASAQRS). The EW-D ASA provides an RF active feed for up to four receivers.
Answered by: Lisa S
Date published: 2022-07-04
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