Sennheiser EW-D SKM-S (S1-7) RF Handheld Transmitter

The Sennheiser EW-D SKM-S (S1-7) is a professional digital wireless handheld transmitter designed for Evolution Wireless Digital (EW-D) systems.
This version is supplied without a microphone capsule, allowing you to add any compatible Sennheiser MMD or MMK series module to match your sound preference.
Operating in the 606.2–662 MHz range, it delivers low-latency 24-bit digital audio, excellent RF stability, and robust stage-ready construction.

Key Features

• Frequency range: 606.2–662 MHz (S1-7 band)

• Digital UHF transmission with 24-bit audio

• Ultra-low latency (approx. 1.9 ms)

• Capsule-ready design (no capsule included)

• Accepts all Sennheiser MMD and MMK microphone capsules

• On/Off mute switch

• OLED display for system information and status

• Strong RF performance with up to 90 channels (environment dependent)

• AES 256-bit encrypted transmission

• Durable metal handheld body designed for touring and professional use

• Seamless syncing using the Smart Assist app

Technical Specifications

• RF output power: up to 10 mW

• Capsule interface: Standard Sennheiser modular mount

• Power:

  • BA 70 rechargeable battery

  • 2 × AA batteries

• Battery runtime:

  • Up to 8 hours with BA 70