Product Overview

The Sennheiser EW-D SKM-S BASE SET is a professional digital wireless handheld system built for integrators and sound professionals who want to specify their own interchangeable microphone capsule. The set pairs the EW-D SKM-S handheld transmitter featuring a mute switch and rugged metal housing with the EW-D EM single-channel rackmount receiver, delivering 24-bit audio quality, 134 dB of dynamic range, and ultra-low 1.9 ms latency. No capsule is included, freeing you to choose from Sennheiser’s full MMD series including the MD 9235, MD 9045, and MD 835 or compatible third-party capsules to match the exact vocal character your application demands. Available in Q1-6, R1-6, and R4-9 band variants to suit virtually any RF environment.

Product Description

The EW-D SKM-S BASE SET places Sennheiser’s most capable prosumer-to-professional wireless platform in the hands of integrators who want complete control over their microphone capsule selection. The EW-D SKM-S handheld transmitter uses the industry-standard MMD modular capsule adapter system, making it compatible with a wide library of interchangeable capsules from the warm, full-bodied MD 9235 condenser to the reliable, stage-proven MD 835 dynamic and the open, articulate MD 9045 condenser. Simply thread on the capsule that matches your vocalist, speaker, or production requirement and you have a customized handheld wireless instrument.

A dedicated mute switch on the SKM-S body gives performers and presenters discreet RF-transparent signal control without fumbling at the receiver rack. The handheld’s metal housing is built to withstand the rigors of daily stage use, touring, and installed AV environments. Bluetooth 5.1 enables fast, reliable pairing and channel synchronization with the companion EW-D EM receiver via the Sennheiser Smart Assist app. The receiver itself is a half-rack 1 RU rackmount unit with Intelligent Switching Diversity, an OLED display, and an equidistant tuning grid that supports up to 90 simultaneous wireless channels per band drawn from 2240 available UHF frequencies across a 56 MHz operating window. RF output power is 10 mW (ERP), and the system maintains a 328 ft (100 m) line-of-sight operating range with automatic channel scanning to find the cleanest available frequency. The SKM-S runs up to 8 hours on standard AA batteries or 12 hours with the optional Sennheiser rechargeable battery pack.

Key Features

• No Capsule Included Interchangeable MMD Design Compatible with Sennheiser MMD series capsules including MD 9235, MD 9045, MD 835, MD 845, MD 865, MD 935, and MD 945; choose the capsule that best fits your vocalist or application.
• EW-D SKM-S Handheld Transmitter with Mute Switch Metal-housing handheld with an on-body mute switch for discreet signal control on stage and in presentation environments.
• Multi-Band Availability (Q1-6 / R1-6 / R4-9) Available in three UHF bands to match your region’s available spectrum: Q1-6 (470526 MHz), R1-6 (520576 MHz), or R4-9 (552608 MHz).
• 24-Bit Digital Audio, 134 dB Dynamic Range No companding artifacts; ultrawide dynamic range means no transmitter sensitivity adjustments are required in the field.
• Ultra-Low 1.9 ms Latency Near-transparent wireless performance suitable for live performance, broadcast, theater, and in-ear monitoring systems.
• Up to 90 Simultaneous Channels Equidistant tuning grid from Sennheiser’s Digital 6000/9000 platform eliminates complex intermodulation coordination even at large channel counts.
• Intelligent Switching Diversity Dual rear-mount BNC antennas with automatic diversity switching protect against RF dropout and interference.
• Bluetooth Smart Assist App (Android & iOS) Remote frequency scanning, gain control, battery monitoring, and channel assignment from any smartphone without rack access.
• 8 / 12-Hour Battery Life 8 hours on AA alkaline batteries; up to 12 hours with the optional Sennheiser rechargeable battery pack (sold separately).
• 328 ft / 100 m Operating Range UHF line-of-sight range for stages, houses of worship, broadcast facilities, and large installed AV systems.
• OLED Display on Receiver At-a-glance readout of frequency, gain, and battery status on the front panel of the EW-D EM receiver.
• Half-Rack 1 RU Receiver with XLR and TRS Outputs Rackmount hardware included; outputs balanced XLR and unbalanced 1/4″ TRS simultaneously.

Typical Applications

• Vocal wireless for live stage performers who specify their own capsule character
• Houses of worship where clergy and speakers prefer a handheld wireless microphone
• Corporate AV and conference systems with presenter handheld wireless
• Theater and performing arts productions requiring handheld wireless transmitters
• Broadcast interview setups with interchangeable capsule flexibility
• AV integration projects specifying a handheld system with custom capsule selection
• Touring productions where the capsule choice varies by performer or venue

Technical Specifications

Frequently Asked Questions

Q: Does this base set include a microphone capsule?No. The EW-D SKM-S BASE SET ships with the handheld transmitter body and the EW-D EM receiver only no capsule is included. This is intentional: the SKM-S uses Sennheiser’s MMD modular capsule system, so you choose the capsule that best fits your voice type or application. Compatible capsules include the MD 9235 condenser, MD 9045 condenser, MD 835 dynamic, MD 845 dynamic, MD 865 supercardioid condenser, MD 935 dynamic, and MD 945 dynamic, all sold separately.Q: Which capsules are compatible with the EW-D SKM-S transmitter?The SKM-S uses the MMD interchangeable capsule adapter, which is compatible with Sennheiser’s full MMD series of capsule heads. This includes cardioid, supercardioid, and omnidirectional options in both dynamic and condenser variants. Many third-party capsules designed for Sennheiser’s evolution series capsule threads are also compatible consult your capsule manufacturer to confirm compatibility before purchase.Q: What is the mute switch and how does it work?The EW-D SKM-S features a physical mute switch on the body of the handheld transmitter. Engaging the mute switch silences the audio signal at the transmitter while leaving the RF link active preventing RF dropout artifacts on the receiver. This gives performers and presenters discreet, reliable on-body signal control without needing to reach the receiver or mixing console.Q: How many simultaneous EW-D SKM-S systems can I operate?The EW-D platform supports up to 90 simultaneous transmitters per frequency band, using the equidistant tuning grid technology from Sennheiser’s Digital 6000 and 9000 series. This makes the EW-D SKM-S suitable for large multi-channel vocal productions, major conference events, touring shows, and large venues where many wireless channels must coexist cleanly.Q: Which frequency band should I choose Q1-6, R1-6, or R4-9?All three variants offer identical audio quality and features; the only difference is the UHF operating frequency range. Q1-6 covers 470526 MHz, R1-6 covers 520576 MHz, and R4-9 covers 552608 MHz. The right choice depends on available spectrum in your country, region, or venue. If you are unsure which band is appropriate for your deployment, contact Creation Networks at for frequency coordination guidance.Q: Can I control the EW-D EM receiver remotely from a smartphone?Yes. The EW-D EM receiver connects via Bluetooth to the free Sennheiser Smart Assist app, available for Android and iOS. The app lets you scan for clean frequencies, assign channels, adjust receiver gain, and monitor battery levels in real time all without physically accessing a mounted receiver during rehearsal or performance.Q: What are the audio outputs on the EW-D EM receiver?The EW-D EM receiver provides one XLR 3-pin balanced output and one 1/4″ TRS unbalanced output, both active simultaneously. Receiver gain is adjustable from -3 to +42 dB in 3 dB steps, giving you precise level matching to any mixing console or recording interface. Frequency response is 20 Hz to 20 kHz.Q: What is the battery life of the EW-D SKM-S handheld transmitter?The EW-D SKM-S runs up to 8 hours on standard AA alkaline batteries. With the optional Sennheiser rechargeable battery pack (sold separately and compatible with Sennheiser’s charging systems), battery life extends to up to 12 hours sufficient for a full day of events without a battery change.