Shure UL4 UniPlex Cardioid Lavalier Microphone — XLR Connector with RPM400 (Black)
UL4 Overview
The Shure UL4 UniPlex is a professional lavalier microphone featuring a cardioid polar pattern designed specifically for spoken-word applications where isolation from surrounding noise sources is essential. Its directional pickup makes it well-suited for environments with stage noise, audience bleed, or close-proximity presenters sharing the same space. Supplied with the Shure Plex cable and XLR connector with RPM400, this configuration integrates directly into standard wired audio systems without additional adapters. Audio engineers, broadcast technicians, AV integrators, and corporate presentation specialists will find the UL4 a reliable solution for demanding speech reinforcement scenarios.
The cardioid pattern provides meaningful rejection of off-axis sound sources, giving operators greater control over gain structure and mix clarity in live and broadcast environments.
Key Features
- Cardioid Polar Pattern — UniPlex directional design rejects sound from the sides and rear, reducing pickup of stage noise, audience, and adjacent presenters
- Lavalier Form Factor — Low-profile, discreet body designed for clip-on placement on clothing, ideal for presentations, conferences, and broadcast talent
- Shure Plex Cable — Included Plex cable construction provides durability and flexibility for demanding daily use in live and installed environments
- XLR Connector with RPM400 — Terminates in a standard XLR connector, enabling direct connection to mixing consoles, preamps, and installed audio systems
- Broad Application Range — Optimized for presentations, speeches, conferences, education, and broadcast use cases requiring consistent, intelligible voice capture
- Available in Multiple Colors and Connector Options — Black finish with XLR connector; additional color and connector variants available to match talent and system requirements

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