Sennheiser EM 300-500 G4 Wireless Receiver (Aw+: 470 to 558 MHz)

The Sennheiser 509670 is a wireless receiver designed for engineers and performers who need rock-solid radio links on stage, in broadcast studios, or in fixed installations. Working in the Aw+ band from 470 to 558 MHz, it forms the heart of an Evolution Wireless G4 system and delivers the clarity and confidence that professionals expect from Sennheiser.

True diversity circuitry constantly compares two independent RF paths and selects the stronger signal, so dropouts stay out of the show. An 88 MHz tuning window lets you line up as many as 32 simultaneous channels, making the receiver a natural choice for multi-mic theater productions, corporate events, and worship services where spectrum is often crowded. With a maximum transmission distance of roughly 100 meters, talent can roam large stages or convention floors without losing connection.

Operation is straightforward thanks to an OLED screen that remains readable in daylight as well as in dark control rooms. The front panel gives quick access to frequency scans, syncing, and menu navigation, while the rear panel houses balanced XLR and unbalanced quarter-inch outputs that integrate with consoles, recorders, or powered speakers.

For networked setups, the built-in Ethernet port links the receiver to Sennheiser Control Cockpit and Wireless Systems Manager software. From a laptop or tablet you can monitor RF levels, audio peaks, and battery status across an entire rack, saving valuable setup time on tour or in a permanent installation.

Compatibility with earlier Evolution series transmitters makes the EM 300-500 G4 a practical upgrade path. Whether you are refreshing an existing inventory or starting from scratch, the unit drops neatly into a single rack space. Two detachable rod antennas, a power supply, and rackmount ears are included, so you can unbox, install, and put it to work right away.

• True diversity reception that minimizes dropouts and interference
• OLED display that stays readable under any lighting and simplifies navigation
• 88 MHz tuning range and support for up to 32 linked channels
• Ethernet connectivity for remote control through Sennheiser software
• Operational range of approximately 100 meters, ideal for large stages or venues
• Backward compatibility with previous Evolution Wireless transmitters
• Includes rackmount kit, two rod antennas, and a universal power supply