SENNHEISER EW-DX SKM-S (Q1-9)

With a dynamic range of 134 dB and ultra-low latency of just 1.9 ms, the Sennheiser EW-DX SKM-S delivers pristine, reliable wireless audio for professional live sound, broadcast, and installed applications. This digital handheld transmitter operates in the Q1-9 frequency band (470–550 MHz) and is built on the Evolution Wireless Digital platform, offering AES-256 encryption, a robust metal housing, and a programmable mute switch.

Overview

The EW-DX SKM-S is a digital handheld transmitter designed for use with Sennheiser EW-DX series receivers. It features a Sennheiser standard microphone capsule interface, making it compatible with a wide range of capsules including the MMD 835, MMD 845, and MMK 965. The transmitter provides 10 mW RF output power and supports up to 12 hours of operation with the optional BA 70 rechargeable battery pack, or can be powered by two AA batteries.

What stands out

• 134 dB dynamic range for exceptional audio clarity and headroom
• Ultra-low latency of 1.9 ms for real-time monitoring and performance
• AES-256 encryption for secure transmission
• Robust metal housing for durability in demanding environments
• OLED display for clear status indication
• Programmable mute switch for flexible control

Technical details

• Frequency band: Q1-9 (470–550 MHz)
• RF output power: 10 mW ERP
• Audio frequency response: 20 Hz – 20 kHz (-3 dB)
• System latency: 1.9 ms
• Modulation: Digital
• Encryption: AES 256
• Power supply: 2x AA batteries or BA 70 rechargeable battery pack
• Battery life: up to 12 hours with BA 70
• Display: OLED
• Housing: robust metal
• Microphone capsule interface: Sennheiser standard
• Sampling rate: 24-bit / 48 kHz
• THD: < -60 dB for 1 kHz at -3 dBfs
• Operating temperature: -10 °C to +55 °C

Our verdict

The Sennheiser EW-DX SKM-S sets a new benchmark for digital wireless handheld transmitters. Its combination of wide dynamic range, negligible latency, and enterprise-grade security makes it an ideal choice for professionals who demand flawless performance night after night.