Sennheiser EW-DX EM 2 Two-Channel Digital Rackmount Receiver

The Sennheiser 509342 is a rackmount wireless receiver known as the EW-DX EM 2. It delivers two independent digital channels in a sturdy half-rack metal chassis, making it an easy fit in a touring rack, a conference room cabinet, or a fixed installation in a lecture hall.

Setup is quick: engage the auto-scan function and the receiver locates the cleanest frequencies within the 470 to 550 MHz band, then syncs with EW-DX transmitters in seconds. Engineers who need secure transmission can enable AES 256 encryption, and venues that run large channel counts can switch to Link Density mode to accommodate up to 293 channels without frequency clashes.

Everyday operation is just as straightforward. The front-panel OLED screen gives clear readouts of RF status, audio levels, and battery life, while the rear panel offers both balanced and unbalanced outputs for integration with mixers or recording interfaces. Power over Ethernet simplifies cabling in permanent installs, and the built-in network port ties the receiver into Sennheiser Control Cockpit or Wireless Systems Manager for centralized monitoring. When you need quick adjustments from a smartphone, Bluetooth pairs the unit with the free Smart Assist app.

The EW-DX EM 2 thrives in corporate presentation suites, houses of worship, broadcast trucks, and live stages where reliability, scalability, and low-latency audio matter. Whether you are a system designer building a multi-room campus or a rental company supporting back-to-back events, this receiver gives you the flexibility to grow the system and the confidence that every word and note will land cleanly with the audience.

• Handles two separate digital channels in a metal half-rack chassis
• Operates across 470-550 MHz with automatic frequency scan and sync
• AES 256 encryption protects confidential audio
• Link Density mode supports large multi-channel setups up to 293 channels
• Power over Ethernet reduces cabling in fixed installations
• Bluetooth connectivity enables smartphone control through the Smart Assist app
• OLED display offers clear, real-time data on RF and audio performance
• Works with EW-DX bodypack, handheld, and tabletop transmitters
• Ships with rackmount kit and power supply for immediate installation