Unidirectional ECM Mic with Silicone Sleeve for Vocal & Broadcasting

Overview

The ECM-B1812UL45-26513 is a professional-grade unidirectional back-electret condenser microphone purpose-built for vocal performance, live streaming, and broadcasting. Its cardioid (uni-directional) pickup pattern effectively rejects off-axis ambient noise, ensuring focused capture of the user’s voice with minimal room coloration—perfect for home studios, podcasting, karaoke systems, and stage use.

Key Features

• Integrated Silicone Sleeve – Hollow silicone sleeve provides effective vibration isolation, mechanical protection, and acoustic sealing for stable mounting in various enclosures. Bare microphone core diameter is 16mm; with the silicone sleeve, the total diameter expands to 18mm.
• Unidirectional (Cardioid) Pickup Pattern – Focuses on sound from the front while rejecting noise from the sides and rear, ideal for vocal isolation.
• High Sensitivity (-45±2dB) – Delivers consistent output across all units with RL=680Ω, Vs=1.5V, ensuring reliable performance.
• High SNR (70dB Typ., A-weighted) – Provides a clean, low-noise signal path that preserves dynamic range and vocal nuances.
• Deep, Powerful Bass Response – Engineered frequency response adds warmth, body, and presence to vocals.
• Bright, Articulate High Frequencies – Maintains exceptional clarity and detail for crisp, intelligible vocals.
• High Max SPL (110dB, THD≤3%) – Handles both soft passages and loud singing without distortion or clipping.
• Wide Operating Voltage (1.0–10.0V DC) – Compatible with a broad range of audio interfaces, mixers, and portable devices.
• Standard Operating Voltage (1.5V DC) – Optimized for consistent performance at nominal conditions.
• Low Current Consumption (≤500µA) – Ideal for battery-powered and energy-efficient applications.
• Low Output Impedance (≤680Ω) – Ensures stable signal transmission with minimal interference.
• Voltage Decrease Characteristics (-3dB Max, Vs=1.5V to 1.0V) – Maintains stable performance even with voltage fluctuations.

Technical Specifications

• Model: ECM-B1812UL45-26513
• Directional Characteristic: Uni-directional (Cardioid)
• Sensitivity: -45±2dB (RL=680Ω, Vs=1.5V, @f=1kHz, Pin=1Pa, 0dB=1V/Pa, L=50cm)
• Output Impedance: 680Ω (Max.)
• Signal-to-Noise Ratio: 70dB (Typ., A-weighted network)
• Maximum Input Sound Pressure Level: 110dB (THD≤3%)
• Standard Operating Voltage: 1.5V DC
• Operating Voltage Range: 1.0–10.0V DC
• Decrease Voltage Characteristics: -3dB (Max., Vs=1.5V to 1.0V DC)
• Current Consumption: 500µA (Max.)
• Frequency Response: See Typical Frequency Response Curve (Fig.2)
• Standard Test Circuit: RL=680Ω, Vs=1.5V DC (See Fig.1)
• Dimensions: Bare microphone core diameter: 16mm; with silicone sleeve: 18mm (adds 1mm per side).

Reliability & Environmental Durability

• High-Temperature Test: +80°C for 100 hours, sensitivity change ≤±3dB
• Low-Temperature Test: -40°C for 100 hours, sensitivity change ≤±3dB
• Humidity & Heat Test: +55°C, 85% RH for 100 hours, sensitivity change ≤±3dB
• Thermal Shock Test: +80°C 0.5H → room temp 1H → -40°C 0.5H → room temp 1H, 10 cycles, sensitivity change ≤±3dB
• Vibration Test: 10-55Hz, 1.52mm amplitude, 2 hours per X/Y/Z direction, sensitivity change ≤±3dB
• Dropping Test: 1.0m height onto marble floor, 5 times without package, sensitivity change ≤±3dB
• Storage Temperature: -35°C to +60°C
• Operating Temperature: -35°C to +60°C

Soldering & Handling Guidelines

• Soldering temperature: 360±10°C, soldering time: ≤3 seconds
• Operators, fixtures, and soldering iron must be statically grounded
• Recommended PCB hole size: MIC Diameter + 0.05mm
• Recommended PCB hole height: MIC Height – 0.2mm

Built for durability and consistent performance, the ECM-B1812UL45-26513 is the ideal choice for content creators, vocalists, and audio engineers seeking a professional-grade microphone that delivers deep bass warmth, bright treble clarity, and superior noise rejection in a robust, reliable package—now with the added benefit of a hollow silicone sleeve that expands the diameter from 16mm to 18mm for enhanced vibration isolation and secure mounting.