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Sennheiser

Sennheiser EM 300 Wireless True Diversity Receiver

$299.00

The Sennheiser EM 300 (available in various generations like G2, G3, and G4) is a stationary, rack-mountable UHF receiver built with a sturdy metal housing designed to withstand the demands of live performances, broadcast environments, and fixed installations. It operates within a wide UHF bandwidth, typically between 42 MHz (G3) and 88 MHz (G4), and offers a large number of tunable frequencies (e.g., 1680 or more) to ensure clear, interference-free operation across various environments. The true diversity reception system is a core feature, automatically switching between two separate antenna inputs to mitigate signal dropouts. Modern iterations include an Ethernet port for remote monitoring and control via Sennheiser's Wireless System Manager (WSM) software, a feature valuable for multi-channel setups.

View Product Features
  • True Diversity Reception: The receiver uses true diversity technology, which switches between two antennas and receiver circuits to provide the highest quality signal and prevent dropouts.
  • Wide Frequency Bandwidth: Offers a substantial switching bandwidth (e.g., 42 MHz or 88 MHz depending on the generation and frequency band), with numerous tunable UHF frequencies available for selection to avoid interference.
  • Connectivity and Control: Features an integrated Ethernet port, allowing for remote monitoring, control, and frequency coordination via computer using Sennheiser's Wireless System Manager (WSM) or Control Cockpit software.
  • Automatic Frequency Management: Includes an automatic frequency scan feature that searches for available, interference-free channels and a wireless sync function (via infrared) to link parameters with the associated transmitter quickly.
  • User Interface: Equipped with an intuitive backlit graphic display (OLED on G4 models) for clear visibility of receiver and transmitter information, even in dark conditions.
  • Audio Quality: Employs the Sennheiser HDX compander system for crystal-clear sound reproduction and high signal-to-noise ratio (>115 dBA for G3/G4 models).
  • Robust Construction: Housed in a durable, full-metal chassis suitable for demanding professional use.
  • Output Connectivity: Provides both balanced XLR and unbalanced 1/4" (6.3 mm) jack audio outputs for flexible connection to a mixing board or PA system.
  • Integrated Features: Includes an integrated equalizer and Soundcheck mode for audio control and system testing, as well as a 4-step battery status display for the linked transmitter.
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About the Sennheiser EM 300 Wireless True Diversity Receiver

The Sennheiser EM 300 is a professional true diversity UHF wireless receiver designed for reliable audio transmission in live sound, broadcast, and theatrical applications. Operating within a selectable frequency range, this receiver employs a true diversity system with two separate antenna inputs and independent RF circuits. It continuously monitors the signal strength on both antennas and instantaneously switches to the antenna providing the stronger, clearer signal, effectively combating dropouts and interference caused by multipath reflections or obstructions. This results in a stable, robust wireless link for microphones or instruments, which is critical in environments where a cable-free performance is essential.

The receiver is engineered for ease of use and integration. It features a clear front-panel display that shows frequency, battery status of the connected transmitter, audio level, and RF signal strength. Users can select from a wide range of pre-programmed frequency banks and channels to find an interference-free frequency, and the unit supports multiple systems operating simultaneously within the same location. Audio output is provided via balanced XLR and unbalanced 1/4-inch jacks, and the receiver includes features like adjustable squelch to minimize noise when no signal is present, and adjustable audio gain. It is typically rack-mounted in a 1U or 2U chassis, making it a standard component in professional audio racks for touring or installed systems.

Powered by an external AC adapter, the EM 300 is built to Sennheiser's renowned standards for audio quality and reliability. It is often paired with compatible Sennheiser bodypack or handheld transmitters (like the SK series) and microphones. By providing a secure, high-fidelity wireless connection, the Sennheiser EM 300 receiver empowers performers and presenters with freedom of movement while delivering the audio clarity and consistency demanded by professional users.

Key Features

  • True Diversity Reception: The receiver uses true diversity technology, which switches between two antennas and receiver circuits to provide the highest quality signal and prevent dropouts.
  • Wide Frequency Bandwidth: Offers a substantial switching bandwidth (e.g., 42 MHz or 88 MHz depending on the generation and frequency band), with numerous tunable UHF frequencies available for selection to avoid interference.
  • Connectivity and Control: Features an integrated Ethernet port, allowing for remote monitoring, control, and frequency coordination via computer using Sennheiser's Wireless System Manager (WSM) or Control Cockpit software.
  • Automatic Frequency Management: Includes an automatic frequency scan feature that searches for available, interference-free channels and a wireless sync function (via infrared) to link parameters with the associated transmitter quickly.
  • User Interface: Equipped with an intuitive backlit graphic display (OLED on G4 models) for clear visibility of receiver and transmitter information, even in dark conditions.
  • Audio Quality: Employs the Sennheiser HDX compander system for crystal-clear sound reproduction and high signal-to-noise ratio (>115 dBA for G3/G4 models).
  • Robust Construction: Housed in a durable, full-metal chassis suitable for demanding professional use.
  • Output Connectivity: Provides both balanced XLR and unbalanced 1/4" (6.3 mm) jack audio outputs for flexible connection to a mixing board or PA system.
  • Integrated Features: Includes an integrated equalizer and Soundcheck mode for audio control and system testing, as well as a 4-step battery status display for the linked transmitter.

Sennheiser EM 300 Wireless True Diversity Receiver Specs

Receiver Performance
System Type
True Diversity UHF
Frequency Range
Specific band (e.g., 516-558 MHz, model dependent)
Diversity Method
Switching based on RF level
Audio & Controls
Audio Outputs
Balanced XLR, Unbalanced 1/4"
Audio THD
<0.9%
Squelch
Adjustable
Display & Monitoring
Display
LCD for Frequency, Battery, RF/Audio Level
Indicators
RF Signal, Audio Peak, Power
Channel/Bank Selection
User selectable
Physical & Power
Power Supply
External 12-18V DC
Rack Units
1U or 2U (model dependent)
Antenna Connectors
2x BNC
Compatibility & Use
Compatible Transmitters
Sennheiser SKM, SKP, EK series
Primary Application
Professional Wireless Microphone/Instrument System
Key Feature
True Diversity for reliable reception

Key Features

  • True Diversity Reception: The receiver uses true diversity technology, which switches between two antennas and receiver circuits to provide the highest quality signal and prevent dropouts.
  • Wide Frequency Bandwidth: Offers a substantial switching bandwidth (e.g., 42 MHz or 88 MHz depending on the generation and frequency band), with numerous tunable UHF frequencies available for selection to avoid interference.
  • Connectivity and Control: Features an integrated Ethernet port, allowing for remote monitoring, control, and frequency coordination via computer using Sennheiser's Wireless System Manager (WSM) or Control Cockpit software.
  • Automatic Frequency Management: Includes an automatic frequency scan feature that searches for available, interference-free channels and a wireless sync function (via infrared) to link parameters with the associated transmitter quickly.
  • User Interface: Equipped with an intuitive backlit graphic display (OLED on G4 models) for clear visibility of receiver and transmitter information, even in dark conditions.
  • Audio Quality: Employs the Sennheiser HDX compander system for crystal-clear sound reproduction and high signal-to-noise ratio (>115 dBA for G3/G4 models).
  • Robust Construction: Housed in a durable, full-metal chassis suitable for demanding professional use.
  • Output Connectivity: Provides both balanced XLR and unbalanced 1/4" (6.3 mm) jack audio outputs for flexible connection to a mixing board or PA system.
  • Integrated Features: Includes an integrated equalizer and Soundcheck mode for audio control and system testing, as well as a 4-step battery status display for the linked transmitter.
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