Electro-Voice R300-L/A - UHF Wireless System with ULM18 Cardioid Lavalier Microphone (A-Band 618–634 MHz)

Electro-Voice R300-L/A - UHF Wireless System with ULM18 Cardioid Lavalier Microphone (A-Band 618–634 MHz)

The Electro-Voice R300-L/A is a complete wireless system combining the R300 true diversity receiver with the BP-300 bodypack transmitter and the ULM18 lavalier microphone, a cardioid back-electret condenser lavalier microphone. Operating in the A-band (618–634 MHz) and offering 32 channels per band (up to 8 simultaneous systems ), with quick setup features such as ClearScan (automatic channel search) and EZsync (one-step infrared synchronization). With a metal chassis for the receiver and bodypack, and a typical battery life of over 14 hours on two AA batteries, it is a rugged, simple-to-use solution for presentations, education, worship, theater, and corporate events.

The included ULM18 provides superior intelligibility and improved gain-before-feedback thanks to its cardioid directivity. It comes with an alligator clip and detachable wire mesh windscreen , and includes a 1 m fixed TA4F cable for direct connection to the BP-300. The system maintains an audio range of 80 Hz to 18 kHz (±2 dB) and a signal-to-noise ratio of >100 dB (A-weighted) , ensuring clean, consistent sound.

Main features

• Band A (618–634 MHz) with 32 channels and up to 8 simultaneous systems per band.
• R300 receiver with true diversity , RF/Audio indicators and balanced XLR and 6.35 mm jack outputs.
• ClearScan and EZsync over IR for fast, error-free startup.
• BP-300 metal transmitter with LCD , 8 mW RF , and >14 h on 2 AA batteries; TA4F connector and LAV/INS gain selector.
• ULM18 cardioid lavalier microphone (100 Hz–18 kHz, 5.6 mV/Pa, 200 Ω), with clip and mesh windscreen.
• System Audio : 80 Hz–18 kHz (±2 dB), S/N >100 dB , distortion <1.0 % .
• Rugged construction : metal chassis on receiver and bodypack; optional rack kits.

Product benefits

• Setup in seconds : ClearScan locates the best channel and EZsync transfers the setting to the transmitter immediately.
• Signal stability in complex scenarios thanks to true diversity and squelch managed by tone and amplitude.
• Clear voice and feedback control : The cardioid ULM18 reduces leakage and helps increase gain before feedback.
• Extended battery life with standard AA batteries for full days without interruptions.
• Flexible installation : desktop or 19″ rack with the RM-300 (1 receiver) or RMD-300 (2 receivers) accessories.

Use cases

• AV presentations and teaching with complete freedom of movement.
• Corporate events, worship, and theater with multi-channel deployments.
• Voice recording, streaming, and sound reinforcement in conference rooms.

Frequently Asked Questions

• What's included? R300 receiver, BP-300 transmitter, ULM18 clip-on microphone with windscreen, receiver power supply, and basic accessories.
• Can I use other microphones? Yes, any EV/Telex lavalier or headset with a TA4F compatible with the BP-300 pinout.
• Can it be rack-mounted? Yes, with the optional RM-300 (one) or RMD-300 (two) receiver kits in 1U of 19″.
• Can I expand the number of channels? Yes, up to 8 simultaneous systems per band with proper coordination.

Description for projects

UHF A-band 618–634 MHz wireless system comprising an R300 receiver (PLL, true diversity, 80 Hz–18 kHz audio ±2 dB, S/N >100 dB, XLR/6.35 mm jack outputs, 12–16 V DC power supply; dimensions 43 × 206 × 210 mm), a BP-300 transmitter (8 mW RF output, LCD, 2×AA, >14 h, TA4F; dimensions 84 × 66 × 23 mm) and a ULM18 cardioid lavalier microphone (100 Hz–18 kHz, 5.6 mV/Pa, 200 Ω, 1 m TA4F cable, clip and mesh windscreen). 32 channels per band; ClearScan and EZsync functions; metal chassis; optional RM-300/RMD-300 rack kits.