R300-E Head Worn System - HM3 Omni-Directional Microphone by Electro-Voice
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Head Worn System - HM3 Omni-Directional Microphone

  • R300-E
  • R300-E
  • R300-E
The R300-E is a robust UHF wireless bodypack system, suitable for any application where the convenience of a wireless headworn microphone is required. The system's BP-300 rugged metal bodypack transmitter is simple to use, and is powered by two AA batteries. The system's light-weight, double-ear hook HM3 headworn microphone is comfortable for extended daily use, and provides the user the convenience of hands-free presentations or performances. The receiver's dual antenna diversity helps avoid signal dropouts, and its durable metal frame and chassis can either be used on a tabletop, or rack-mounted with optional rack mounting hardware.   Visit the R300 microsite  
Frequency Band Estimator
  • ClearScan automatically finds the clearest channel
  • EZsync one-step channel setup
  • HM3 omni-directional microphone
  • 14 hour battery life from two AA alkaline
  • Rugged metal transmitter
  • Metal receiver chassis with optional rack mount
Antennas Flexible TNC 1/2 Wave
Audio Frequency Response 80 Hz - 18kHz +/-2dB
Balanced Line Level Output (RMS Adjustable) 10 - 100 mV
Battery Life 14 hours with (2) AA alkaline typical
Case Material metal
Connector Type 1/4 inch unbalanced, 3-pin XLR balanced
Controls on/off, Set, Up, Down, Sync
Distortion (@ 1 kHz, 40 kHz deviation) Less than 1.0, 0.4 typical %
Diversity True Antenna
Dynamic Range greater than 95 dB
Element HM-3 Omni-directional headworn
Number of Channels 32 per band, 8 Simultaneous
Operating Temperature Range 5º - 45º C (41º - 113º F)
Power Requirement 12-16 VDC, 500 mA max
Power Supply 12 VDC, 500mA max
Receiver Type Synthesized PLL
RF Frequency Range 16 MHz
RF Output 8 mW typical
RF Sensitivity (12 dB SINAD) less than 1.0 uV
Signal-to-Noise Ratio (A-weighted) greater than 100 dB
Squelch Tone code plus Amplitude

R300 Systems are available in the following bandwidths. The from and to frequency numbers shown below represent the lower and upper limits of the system tuning bandwidth.

Frequency Spread NTSC TV Channel Orientation
Band From To Lower (from) Upper (to)
A 618.000 MHz 634.000 MHz 38 41
B 678.000 MHz 694.000 MHz 48 51
C 516.000 MHz 532.000 MHz 21 24

Selecting the proper system tuning bandwidth for your local area is very important to successful wireless microphone system performance. Please make sure to use our automated frequency band selector to help in choosing the most appropriate bandwidth for your area.
Use the Frequency Band Selector

Optional accessories
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