Cardioid ECM Mic for Conference & Recording

A professional cardioid electret condenser microphone with Sanyo Japan core, 76dB SNR, -36±2dB sensitivity, and 120dB SPL—delivering clean, natural sound for conference systems, instrumental recording, and vocal applications.

Model: ECM-B1655UL36-26545
Dimensions: 16 × 5.5 mm
Directivity: Unidirectional
Sensitivity: -36 dB ± 2
Impedance: 2.2 kΩ
S/N Ratio: 76 dB
Max SPL: 120 dB
Operating Voltage: 2 Vdc
Frequency Response: 50 Hz ~ 20 kHz
Current Consumption: 500 μA

Request Information / Sample

Tell us your project stage. Our engineering team will respond accordingly.

Lead Time

Samples: 1–3 weeks
Mass production: 2–4 weeks

Customization

Application-based engineering support
Structure / sensitivity / acoustic tuning

MOQ

3,000–5,000 pcs
Per model / per production batch

Certification

RoHS & UL compliant
Industrial reliability assured

Overview

The ECM-B1655UL36-26545 is a professional-grade cardioid electret condenser microphone powered by a Sanyo Japan core for superior audio performance. Its standard cardioid pickup pattern delivers precise front-focused sound capture with excellent rear and side noise rejection, ensuring clear speech intelligibility in conference rooms, meeting systems, and voice communication applications.

Key Features

Sanyo Japan Core – Premium Japanese Sanyo transistor delivers exceptional audio quality and long-term reliability.
Standard Cardioid Pickup Pattern – Tight front focus with strong side/rear rejection, optimized for speech clarity in noisy environments.
High Sensitivity (-36±2dB) – Delivers consistent output across all units with RL=2.2kΩ, Vs=2.0V.
Ultra-High SNR (76dB Typ.) – Exceptionally clean signal path preserves vocal nuances and speech intelligibility.
Flat Frequency Response (50-20kHz) – Accurate full-range audio reproduction.
High Max SPL (120dB, THD≤5%) – Handles loud sound sources without distortion.
Wide Operating Voltage (1.0–10.0V DC) – Broad compatibility with various devices.
Low Current Consumption (≤500µA) – Ideal for battery-powered applications.

Technical Specifications

Model: ECM-B1655UL36-26545
Directional Characteristic: Cardioid
Sensitivity: -36±2dB (RL=2.2kΩ, Vs=2.0V, @f=1kHz, Pin=1Pa, 0dB=1V/Pa, L=50cm)
Output Impedance: 2.2kΩ (Max.)
Signal-to-Noise Ratio: 76dB (Typ.)
Maximum SPL: 120dB (THD≤5%)
Standard Operating Voltage: 2.0V DC
Operating Voltage Range: 1.0–10.0V DC
Current Consumption: 500µA (Max.)
Frequency Response: 50Hz – 20kHz

Typical Applications

Conference Systems – Focused pickup reduces ambient noise for clear remote communication.
Meeting Rooms & Boardrooms – Ensures every participant’s voice is captured with clarity.
Voice-Over & Narration – Clean, dry vocal capture ideal for post-production.
Public Address & Intercom – Reliable voice transmission in professional environments.

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
Vibration Test: 10-55Hz, 1.52mm amplitude, 2 hours per X/Y/Z direction
Dropping Test: 1.0m height onto marble floor, 5 times without package
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-B1655UL36-26545 is the ideal choice for system integrators and product designers seeking a high-performance cardioid microphone that delivers clear, focused voice capture with superior noise rejection in a robust, reliable package.