Sennheiser 509370

Overview

The Sennheiser 509370 is a four-channel digital rackmount wireless receiver designed for professional audio environments. Operating in the R1-9 band from 520 to 607 MHz, it offers an 87 MHz selectable bandwidth with 3480 frequencies, enabling reliable operation even in crowded RF conditions. This unit integrates Dante networking for seamless audio-over-IP connectivity and fits into a standard 19-inch rack, making it a versatile choice for venues requiring multiple wireless microphone channels.

Key features

• Four independent audio channels housed in a single rack unit to save space and simplify setup.
• Integrated Dante networking with four network ports for primary and secondary streams, supporting redundant or split network configurations.
• Link Density mode allows up to 293 simultaneous microphone channels by evenly spacing frequencies to minimize intermodulation interference.
• Bluetooth Low Energy control via the Smart Assist app enables remote management from up to 120 feet, speeding up frequency coordination and adjustments.
• AES-256 encryption secures wireless audio transmissions, protecting sensitive content during corporate or confidential events.
• Dual OLED screens and a jog wheel provide intuitive local control and quick navigation through settings.
• Flexible audio outputs include four balanced XLR and four unbalanced quarter-inch connectors, facilitating easy integration with mixing consoles, recorders, or powered speakers.
• Durable metal chassis with an internal power supply and included rackmount hardware ensures reliable operation in demanding environments.
• Compatible with EW-DX handheld and bodypack transmitters, supporting a wide range of wireless microphone setups.

Key specs

• Frequency range: 520 to 607 MHz (R1-9 band)
• Selectable bandwidth: 87 MHz
• Number of selectable frequencies: 3480
• Simultaneous channels supported in Link Density mode: up to 293
• Audio outputs: 4 balanced XLR, 4 unbalanced quarter-inch
• Network ports: 4 (for Dante primary and secondary streams)
• Encryption: AES-256
• Bluetooth control range: up to 120 feet
• Rack size: 1U, fits standard 19-inch racks
• Chassis: metal with internal power supply

Connectivity and compatibility

This receiver integrates directly with Dante audio-over-IP systems, allowing straightforward connection to modern digital audio networks. The four network ports support both primary and secondary Dante streams, enabling flexible network topologies including redundancy for mission-critical applications. On the audio side, balanced XLR outputs provide professional-grade connections to mixing consoles, while unbalanced quarter-inch outputs offer compatibility with a variety of recording and amplification devices. Bluetooth Low Energy control ensures convenient wireless management without needing physical access to the rack.

Performance and reliability

Designed for demanding professional environments, the receiver’s Link Density mode maximizes channel capacity by carefully spacing frequencies to avoid intermodulation issues. The AES-256 encryption safeguards audio transmissions, making it suitable for confidential presentations and corporate events. Its robust metal chassis and internal power supply contribute to long-term reliability, while the included rackmount hardware simplifies installation in touring stages, lecture halls, or conference centers.

Ideal uses and environments

This receiver is well suited to large-scale productions requiring multiple wireless microphones, such as live concerts, theater performances, corporate conferences, and broadcast studios. Its ability to handle up to 293 simultaneous channels makes it a strong choice for venues with complex audio setups. The Dante integration and flexible outputs also make it a good fit for modern AV installations that rely on networked audio systems. Technicians benefit from Bluetooth control and intuitive local interfaces, streamlining setup and management during rehearsals and live events.

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