BM-111

Relacart BM-111 - Wired Boundary Condenser Microphone

Relacart BM-111 is a wired boundary microphone designed for fixed ceiling or desktop installations in professional AV environments. Featuring a back-electret condenser capsule with a unidirectional hemispherical pickup pattern, it captures sound precisely while minimizing ambient noise.

Its effective RF shielding protects against interference from wireless devices such as mobile phones. Powered by phantom voltage (12-52 V DC) and equipped with a built-in 3-pin male XLR connector, the BM-111 integrates easily into AV systems. Its compact form and discreet design make it ideal for conference rooms, lecture halls, courtrooms, and worship spaces.

Functionality:

• back-electret condenser microphone
• polar pattern: hemispherical (unidirectional)
• frequency response: 80-18,000 Hz
• sensitivity: -34.4 dBV (18 mV/Pa)
• output impedance: <200 Ω
• max SPL: 106 dB (1% THD)
• signal-to-noise ratio: 68 dB (1 kHz at 1 Pa)
• noise voltage: 6.0 µV (A-weighted)
• power supply: phantom 12-52 V DC
• current consumption: 4 mA (typical)
• output connector: built-in 3-pin male XLR
• dimensions: length 75 mm, diameter 20 mm (tube), 39.5 mm (ring)
• weight: approx. 95 g (with nut and rubber ring)

Features:

• ceiling or surface mount - flexible installation options
• RF shielding - clean audio signal in wireless environments
• compact design - discreet presence in professional spaces
• AV system compatibility - easy integration
• durable construction - reliable performance in fixed installations

Relacart BM-111 is a dependable solution for conference, educational, and legal environments where focused audio capture, aesthetics, and RF resistance are essential.