Sennheiser EW-DX SKM-S Digital Wireless Handheld Transmitter (Q1-9: 470 to 550 MHz)

The Sennheiser 509412 is a handheld transmitter that forms part of the EW-DX digital wireless system and operates in the Q1-9 band from 470 to 550 MHz. It gives performers, presenters, and audio engineers a direct way to send clear, reliable audio without fuss.

With an input dynamic range of 134 dB, the transmitter accepts anything from a whisper to powerful vocals without the need for gain adjustments. This generous headroom makes it a smart choice for touring singers, speech applications, and live events where levels can swing quickly.

The body is made from metal and built to handle life on the road. A switch that you can program as mute or push-to-talk provides on-mic control for hosts and moderators. Because the transmitter uses Sennheiser’s standard capsule interface, it welcomes a wide selection of Sennheiser and Neumann capsules, letting you tailor the voice or instrument sound to the room.

An E-Ink display shows frequency, battery status, and naming information even when the unit is powered off, so stage crews can identify each microphone before soundcheck. Add the optional BA 70 rechargeable battery and you can work for up to 12 hours on a single charge.

The 80 MHz tuning window helps you find clean frequencies in congested RF environments, and Bluetooth pairing streamlines setup. For larger systems, engineers can monitor and control settings from a phone or computer through Sennheiser Control Cockpit and the Smart Assist app.

From festival stages and houses of worship to corporate boardrooms and rental inventories, the Sennheiser 509412 offers the sound quality, flexibility, and workflow tools that busy professionals rely on every day.

• 134 dB input dynamic range handles sources with wide level swings
• Switch that can be programmed as mute or push-to-talk
• E-Ink display remains readable even when power is off
• Up to 12 hours of operation with the optional BA 70 rechargeable battery
• 80 MHz tuning bandwidth for easier frequency coordination
• Bluetooth pairing and remote management through Control Cockpit and Smart Assist
• Metal housing made for touring reliability
• Accepts interchangeable Sennheiser and Neumann capsules