Electro-Voice ULM18 Cardioid Condenser Lavalier Microphone with Clip and Windscreen

Electro-Voice ULM18 Cardioid Condenser Lavalier Microphone with Clip and Windscreen

The Electro-Voice ULM18 is an electret condenser lavalier microphone with a cardioid polar pattern , designed for voice pickup with high intelligibility and ambient control. Its directivity helps to improve gain before feedback and reduce ambient noise pickup, making it ideal for presentations, theatre, corporate events, houses of worship and audiovisual production . It includes an integrated 1m cable terminated with a TA4F connector and is supplied with an alligator clip and detachable wire mesh windscreen to protect against wind and plosives, maintaining a discreet appearance on camera and stage.

On a technical level, the ULM18 offers a frequency response of 100 Hz to 18 kHz , sensitivity of 5.6 mV/Pa and output impedance of 200 Ω , figures optimized for spoken voice and compatible with Electro-Voice/Telex wireless bodypack systems that use the brand's standard TA4F pinout. The connector is wired with Pin 1: ground , Pin 2: signal , Pin 3: bias +5 V , Pin 4: N/C , which guarantees direct integration with transmitters such as the R300 series. For wired applications, the Electro-Voice TXA adapter (TA4F to XLR) can be used, which allows the microphone to be powered by standard phantom power.

Main features

• Transducer: Back-electret condenser with cardioid pattern for superior off-axis rejection.
• Frequency response: 100 Hz – 18 kHz, tuned for clear and natural voice.
• Sensitivity: 5.6 mV/Pa (≈ −45 dBV), suitable for wireless bodypack systems.
• Output impedance: 200 Ω.
• Integrated cable: 1 m with TA4F connector and EV/Telex pinout.
• Included accessories: alligator clip and removable wire mesh windscreen.
• Discreet and robust construction: semi-gloss black finish, compact capsule (23 mm long, 8 mm wide) and 20 g weight.

User benefits

• Greater ambient control : The cardioid pattern reduces room leakage and helps minimize PA feedback.
• Secure and quick mounting : the “alligator” clip securely attaches the microphone to clothing and accessories.
• Discretion on camera and stage : small size, black finish and mesh windscreen with low visual impact.
• Immediate integration with EV/Telex beltpacks (TA4F) and option for wired use with the TXA to XLR adapter.
• Intelligible Audio : Optimized response and sensitivity for spoken voice.

Use cases

• Conferences, training, and AV presentations where clarity of speech is a priority.
• Theater, performances, and worship services requiring mobility and low microphone visibility.
• Streaming, interviews, and video production with off-screen lavalier editing.

Frequently Asked Questions

• Is it a dynamic microphone? No. The ULM18 is an electret condenser microphone and requires bias (+5 V from the bodypack) or phantom power via the TXA adapter.
• Can I connect it directly to an XLR input? Not directly. For wired use, use the Electro-Voice TXA (TA4F to XLR) with phantom power.
• What wireless systems is it compatible with? EV/Telex beltpack transmitters that follow the brand's standard TA4F pinout (e.g., R300 series).

Description for projects

Back-electret cardioid condenser lavalier microphone for vocals. Response 100 Hz–18 kHz; sensitivity 5.6 mV/Pa; output impedance 200 Ω; fixed cable 1 m; TA4F connector (Pin 1 ground, Pin 2 signal, Pin 3 +5 V bias, Pin 4 N/C); dimensions 23 mm (length) × 8 mm (width), 25.5 mm with windscreen; weight 20 g; semi-gloss black; accessories: alligator clip and removable mesh windscreen.