• Sennheiser EW-D SKM-S BASE SET Digital Wireless Handheld Microphone System, No Mic Capsule (R1-6: 520 to 576 MHz)
  • Sennheiser EW-D SKM-S BASE SET Digital Wireless Handheld Microphone System, No Mic Capsule (R1-6: 520 to 576 MHz)

Sennheiser EW-D SKM-S BASE SET Digital Wireless Handheld Microphone System, No Mic Capsule (R1-6: 520 to 576 MHz)

SKU: 508761
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Key Features
  • For Presenters and Performers
  • Pro Features with Fast & Easy Set Up
  • No Mic Capsule, Interchangeable Design
  • Handheld Transmitter with Mute Switch

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Sennheiser EW-D SKM-S BASE SET Digital Wireless Handheld Microphone System, No Mic Capsule (R1-6: 520 to 576 MHz) Overview


The Sennheiser EW-D SKM-S BASE SET with Handheld Transmitter and No Mic Capsule combines pristine 24-bit digital audio with an impressive 134 dB dynamic range, equidistant tuning grid, and automated Bluetooth set up App for your phone to create a professional rackmount wireless microphone system that anyone can use. Though easy to set up and simple to operate, the system's pro-level feature set is well equipped to handle the needs of both first-time and experienced users alike, including presenters and lecturers working in business and educational settings, clergy in houses of worship, and live performers in theaters or on musical stages.

The EW-D's ultrawide dynamic range means that input-sensitivity adjustments on the transmitter are not required. 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 RF interference, and the ultralow 1.9ms latency eliminates any noticeable lag when performing live. Additionally, Bluetooth connectivity enables seamless pairing and remote control from your phone via the Smart Assist App. All these features allow the EW-D to automatically handle mic levels and secure the most reliable signal for you in a matter of seconds—without the hassles that can make using a wireless system challenging.

This EW-D SKM-S BASE SET is configured with a single-channel EW-D EM receiver along with a lightweight EW-D SKM-S handheld transmitter with a mute switch and a metal housing—well suited for daily use on stage. The transmitter features an interchangeable microphone capsule design and is offered without a capsule, so you can choose the one that best fits your application.

The transmitter pairs with the receiver 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 transmitter provides up to 8 hours of operation on two AA batteries or 12 hours with a BA 70 lithium-ion rechargeable battery pack (available separately). The L70 USB dual-charging station (available separately) is required for the BA 70 batteries.

The half-rack EW-D EM receiver with removable antennas is 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 receiver features a high-contrast, black-&-white OLED display that uses a streamlined menu system with a dedicated Escape button for quick menu navigation, even in low-light situations. The auto-scan function automatically seeks out the cleanest available frequency for you. If you prefer, you can also configure, control, and operate your system via Bluetooth using the Smart Assist App installed on your iOS/Android phone/tablet—within a 120' range.

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

Legendary Sennheiser Sound with Ultrawide 134 dB Dynamic Range

  • With a remarkable 134 dB dynamic range on the transmitter, the days of worrying about overloading your signal are over. The EW-D can handle a wide variety of sound sources, including loud vocalists and performers, all without requiring any gain adjustment at the transmitter.
  • The ultrawide dynamic range yields impressive signal-to-noise performance and accurate transient response, which bring out all the nuances of your sound.
  • With 24-bit digital audio and a flat 20 Hz to 20 kHz frequency response, the EW-D delivers clear, accurate audio reproduction.
  • The system's ultralow 1.9ms latency is practically undetectable, helping vocalists to stay in the groove when performing live.

Lightweight Handheld Transmitter with Interchangeable Capsule Design

  • The transmitter's interchangeable capsule design allows you to use a variety of dynamic and condenser mic capsules, with pickup patterns ranging from wide omnidirectional to narrow supercardioid—capsules include the MMD 845, MME 865, MMD 935, MMD 945, MMD 42, MM 435, ME 9004, MD 5235, ME 5004, and Neuman KK204 to name a few.
  • The rugged, all-metal transmitter is equipped with a mute button that can be locked out and overridden from the receiver or a mobile device during a performance.
  • The transmitter quickly pairs with the receiver via Bluetooth at a distance up to 120', at the press of a button.

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 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.

Equidistant Tuning Grid—Solid Wireless Reliability with More Channels

  • The EW-D features an equidistant tuning grid that equally spaces 2240 frequencies across the wide 56 MHz bandwidth to prevent disruptive intermodulation issues that occur when multiple transmitters operate in confined spaces.
  • The equidistant grid also enables you to maximize your channel count and operate up to 90 mic channels simultaneously without having to worry about frequency coordination and channel groups—making your setup even easier, even in congested RF environments.
  • The EW-D uses Intelligent Switching Diversity technology to mount a superior defense against multipath and other anomalies that cause RF noise. 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 operates in the UHF band, far away from potential Wi-Fi interference in the 2.4 GHz band.

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 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 set up 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 System

  • 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.
  • 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.

Add Functionality with an EW-D SK Bodypack Transmitter and a Variety of Mics

Sennheiser offers an EW-D SK bodypack that accommodates a variety of headset, instrument cable, and lavalier microphone options to adapt your EW-D system as your needs evolve.



  • The sweat-resistant, subminiature MKE 2 omnidirectional lavalier mic offers a pristine, broadcast-quality sound and is easy to conceal.
  • The unobtrusive ME 2 omnidirectional lavalier mic provides a forgiving pickup pattern that captures sound equally well in every direction. 
  • The ME 4 cardioid lavalier mic cardioid lavalier mic offers a narrower, feedback-resistant pickup pattern for louder events.
  • The ME 3 cardioid headset mic provides enhanced speech clarity for lectures and presentations.


  • The CI 1 instrument cable lets you connect the bodypack transmitter to a guitar, bass, or keyboard.
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Wireless Transmission Digital UHF
Number of RF Channels 2240
Included Transmitters 1 x Handheld
Diversity Intelligent Switching Diversity
RF Frequency Band 520 to 576 MHz
RF Bandwidth 56 MHz
Frequency Step Size 25 kHz
RF Channel Scanning Auto-Scan
Max Operating Range 328.1' / 100 m (Line of Sight)
Max Systems per Setup 90
Built-In Recorder No
Bluetooth 5.1
Bluetooth Operating Distance 120' / 36.6 m (Transmitter Sync, App Control)
Latency 1.9 ms
Dynamic Range 134 dB
Encryption None
Form Factor Tabletop / Rackmount
Mounting Options Rackmount
Rackmount Size 1 RU (1/2 Rack)
Antenna 2 x 1/4 Wave Rod, BNC (Rear-Mount)
Number of Audio Channels 1
Audio I/O 1 x XLR 3-Pin Male Balanced Output (Lockable)
1 x 1/4" TRS Female Unbalanced Output
Gain Range -3 to +42 dB (3 dB Steps)
Audio Output Level XLR Output:
+18 dBu (Balanced)
1/4" Output:
+12 dB (Unbalanced)
Frequency Response 20 Hz to 20 kHz
Network I/O None
Word Clock I/O None
RF Output Power 10 mW (EIRP)
Power Requirements AC/DC Power Adapter
AC/DC Power Adapter 11 to 13 VDC at 300 mA (Included)
AC Input Power 100 to 240 VAC, 50 / 60 Hz
Display & Indicators 1 x OLED (AF Level, Frequency, Mute, RF Level, Transmitter Battery Status)
Housing Metal
Operating Temperature 14 to 131°F / -10 to 55°C
Dimensions 7.4 x 1.7 x 8.3" / 189 x 44 x 212 mm
Weight 2.2 lb / 1 kg
Transmitter 1
Form Factor Handheld
RF Output Power 10 mW (ERP)
Up to 10 mW (EIRP)
Audio I/O None
Included Cable Connector None
Muting Mute Switch
Audio Input Level 2 to 4.35 V RMS
Auto-Level Control No
Sync Method Bluetooth
Antenna 1 x Internal (Handheld)
Power Requirements Battery
Battery Type 2 x AA (Included)
1 x Sennheiser Battery Pack (Not Included, Replaceable)
Approx. Battery Life 8 Hours (Alkaline)
12 Hours (Sennheiser Battery Pack)
Display & Indicators 1 x LED (Mute)
1 x LED (Sync)
Housing Metal
Dimensions 2 x 10.6" / 50 x 268 mm
Weight 10.7 oz / 304 g (without Batteries)
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  • Sennheiser EW-D SKM-S BASE SET Digital Wireless Handheld Microphone System, No Mic Capsule (R1-6: 520 to 576 MHz)
  • 2 x Antenna Rods
  • Rackmount Set
  • 4 x Rubber Feet
  • 2 x AA Batteries
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  • Supplier Code: 508761
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