Sennheiser EW-D SKM-S Base Set (S1-7) Wireless Microphone System

The Sennheiser EW-D SKM-S BASE SET (S1-7) is a versatile digital wireless system built for performers, presenters and venues that demand rock-solid reliability and pristine sound. Combining a rugged rackmount receiver with a handheld transmitter compatible with a wide range of Evolution Wireless Digital microphone capsules, it delivers studio-grade audio, effortless app-based control and the scalability to handle anything from small gigs to complex multi-channel productions.

Operating in the professional UHF spectrum with advanced digital transmission, EW-D offers exceptional range, stability and audio quality. Smart Assist app integration streamlines setup and monitoring, while a huge 134 dB input dynamic range means you can handle whisper-quiet speech and powerful vocals without touching a gain control. Whether you are upgrading an existing rig or building a future-proof wireless system from scratch, this base set gives you a premium foundation you can expand over time.

Effortless setup with Smart Assist

EW-D takes the pain out of wireless configuration. The EW-D Smart Assist app connects to the receiver via Bluetooth Low Energy, guiding you through setup, frequency scanning and synchronisation. Auto scan finds clean channels in seconds, while the app lets you monitor battery status, RF performance and audio levels from your phone or tablet. Even first-time users can get a reliable system up and running quickly, with minimal menu-diving.

Rock-solid UHF digital performance

By combining digital audio transmission with tried-and-tested UHF operation, the EW-D SKM-S BASE SET delivers the best of both worlds. You get the extended range and robustness of UHF, along with the clarity and consistency of a modern digital system. Intermodulation-free operation allows channels to be placed in an equidistant grid, making it far easier to coordinate frequencies in demanding multi-channel environments.

Pristine, low-latency sound

With 24-bit digital audio and a massive 134 dB input dynamic range, EW-D captures every nuance of your performance without clipping or noise. From quiet speech to powerful singing, the system adapts without the need for sensitivity adjustments. Ultra-low latency of 1.9 ms keeps monitoring tight and natural, ideal for in-ear setups and precise stage work where timing is critical.

Scalable and capsule-ready

This base set is designed to grow with you. The handheld transmitter is compatible with a wide selection of Sennheiser Evolution Wireless Digital microphone heads, so you can tailor the sound to different voices and applications. With up to 56 MHz of tuning bandwidth, 2,240 selectable frequencies and support for up to 90 channels (subject to local regulations and environment), EW-D is equally at home in small venues, corporate AV rigs and larger stage productions.

• Smart Assist app control - Connect via Bluetooth Low Energy to the EW-D Smart Assist app for guided setup, auto scanning and remote monitoring. This makes it easy to configure and troubleshoot your system from a phone or tablet, saving time and reducing stress before and during shows.
• UHF digital transmission - Operating in the UHF spectrum with digital modulation delivers excellent range and reliability, even in crowded RF environments. This gives you a stable connection that is far less prone to dropouts and interference, ideal for professional live sound and installed systems.
• Huge 134 dB dynamic range - The system handles extremely quiet and very loud sources without needing sensitivity tweaks. This preserves detail and headroom, so presenters and vocalists can move naturally between soft passages and powerful peaks while maintaining clean, distortion-free audio.
• Scalable frequency architecture - Intermodulation-free operation with equidistant 600 kHz channel spacing, 56 MHz of tuning bandwidth and 2,240 selectable frequencies allows for up to 90 channels. This makes it far easier to build and manage larger multi-channel systems as your requirements grow.

General

• Product Type: Digital wireless base set with stationary receiver and handheld transmitter
• System Type: UHF digital wireless
• Application: Speech and vocals

Receiver

• Dimensions: 212 x 44 x 189 mm
• Mounting: Rack-mountable (hardware availability subject to package contents)
• Tuning Bandwidth: 56 MHz
• Selectable Frequencies: 2,240
• Channel Spacing: 600 kHz equidistant tuning grid
• Frequency Range: 606.200 - 662.000
• Connection Type: Wireless

Transmission and Audio

• Transmission Type: Digital in UHF spectrum
• Audio Resolution: 24-bit
• Audio Input Dynamic Range: 134 dB
• Latency: 1.9 ms
• Intermodulation: Intermodulation-free channel grid
• Maximum Channel Count: Up to 90 channels (environment dependent)

Handheld Transmitter

• Transmitter Type: Handheld
• Microphone Compatibility: For use with a wide range of Evolution Wireless Digital microphone heads
• Housing: Metal
• Power Options: Lithium-ion battery pack (sold separately) or AA batteries
• Battery Life (Lithium-ion pack): Up to 12 hours of operation
• Battery Life (AA batteries): Up to 8 hours of operation (with 2x AA)

Control and Connectivity

• App Control: EW-D Smart Assist app
• App Connection: Bluetooth Low Energy
• Functions via App: Setup, auto scan, synchronisation, monitoring and basic troubleshooting