Electro-Voice HM3 - Omnidirectional Condenser Headset Microphone (TA4F, 1 m Cable)

Electro-Voice HM3 - Omnidirectional Condenser Headset Microphone (TA4F, 1 m Cable)

The Electro-Voice HM3 is a back-electret condenser headset microphone with an omnidirectional polar pattern , designed to deliver clear, consistent hands-free vocals. Designed to work with the R300-E wireless system via its TA4F connector, it combines a comfortable dual-ear headband with an adjustable boom and gooseneck for precise left or right positioning of the capsule. It includes a foam windscreen to control plosives and wind, and a 1m cable that secures to the headband to prevent strain.

Its 50 Hz to 20 kHz frequency response and 10 mV/Pa sensitivity deliver a natural, articulate timbre for presentations, lectures, corporate events, fitness, or worship. The 200 Ω output impedance and EV standard pinout (TA4F) ensure direct integration with compatible bodypacks. For wired setups, the TXA adapter (TA4F → XLR) with standard phantom power can be used.

Main features

• Transducer: Back-electret condenser with omnidirectional pickup for consistent level even when the user is moving.
• Lightweight and stable dual-support headband (both ears); adjustable boom with gooseneck mountable on the left or right.
• Frequency response: 50 Hz–20 kHz, clear and natural sound for speech and voice.
• Professional connectivity: integrated 1m cable with TA4F (pin 1 ground, pin 2 signal, pin 3 +5V bias, pin 4 N/C).
• Construction and finish: Compact semi-gloss black frame, 28g net weight.
• Included accessories: foam windscreen.
• Optional: Wired use with TXA adapter (TA4F to XLR with phantom).

Product benefits

• Comfort and secure support for long sessions thanks to the two-point headband and cable routing through the headband itself.
• Intelligible and stable voice even with head movements, as it is omnidirectional and the microphone is always at the same distance from the mouth.
• Instant integration with compatible EV/Telex beltpacks (R300-E, BP-300) via TA4F.
• Boom mounting versatility (left/right) to accommodate user preferences and staging.

Use cases

• AV presentations, training, and conferences with freedom of movement.
• Fitness , dance or guided sessions where a stable and discreet microphone is required.
• Places of worship, corporate events, and education.
• Streaming and recording of spoken voice content.

Frequently Asked Questions

• Is it dynamic? No. The HM3 is a back-electret condenser and receives bias from the bodypack.
• Can it be used with a tabletop XLR? Yes, with the TXA adapter (TA4F → XLR) that provides the necessary phantom power.
• Does it include a clothing clip? Not necessary; the cable clips onto the headband and the microphone stays securely in place on the boom. A foam windscreen is included.

Description for projects

Omnidirectional back-electret condenser headset microphone with adjustable boom. Response 50 Hz–20 kHz; sensitivity 10 mV/Pa (1 kHz); impedance 200 Ω; fixed 1 m cable with TA4F connector; TA4F pinout: pin 1 ground, pin 2 microphone input, pin 3 +5 V bias, pin 4 N/C; housing dimensions 180 mm (length) × 105 mm (max. width) × 15 mm (min. width); semi-gloss black finish; net weight 28 g; included accessory: foam windscreen.