The ECM77B is a miniature lavalier (tie clip) microphone designed to be inconspicuous. This tiny microphone runs on either phantom power or AA battery operation and comes with an XLR connector. Useful for studio, ENG, and EFP applications.


Hands free microphone

As a lapel microphone, the ECM-77B is an alternative to the traditional hand held microphone and being hands free it allows the presenter to concentrate on her/his performance


Easy and familiar operation

The popularity of the microphone in TV production means that most sound people will be familiar with using the ECM-77.


Two-way powering system

AA-size battery or external phantom power


High-performance frequency response

40-20,000 Hz

Capsule Type Electret Condenser  
Frequency Response 40 Hz to 20 kHz  
Directivity Omni-directional  
Sensitivity *[1] -52.0 dB ±2 dB  
Output Impedance *[2] 150Ω±20%, Balanced  
Dynamic Range 90 dB or more  
Signal-to-Noise Ratio *[3] 64 dB or more  
Inherent Noise *[4] 30 dB SPL or less  
Induction Noise From External Magnetic Field *[5] 5 dB SPL or less  
Wind Noise *[6] 40 dB SPL or less (with windscreen)  
Maximum Input Sound Pressure Level *[7] 120 dB SPL  
Connector B type. Supplied with XLR-3-12C (male) connector in power supply unit (single AA size battery)  
Mic Cable 9.8 feet  
3 m  
Power Requirements DC 1.5 V (AA size battery) or +48 V phantom power  
Battery Operating Time Approx. 6000 h (LR6)  
Power Consumption Internal battery: 0.3 mA or less  
External battery: 2 mA or less  
Dimensions *[8] o5.6 X 12.5 mm (Mic head)  
o20 X 133 mm (Power unit XLR type)  
o13/16 X 5 1/4 inches (Power unit XLR type)  
o1/4 X 1/2 inches (Mic head)  
Mass Approx. 4.3 oz (with power supply unit)  
Approx. 121.5 g (with power supply unit)  
Note *[1] 0 dB = 1 V/Pa, at 1 kHz  
*[2] Output impedance at 1 kHz  
*[3] A-weighted, 1 kHz, 1 Pa.  
*[4] 0dB SPL = 20? Pa.  
*[5] dB SPL/1E-7 T, 0 dB SPL = 20? Pa.  
*[6] Wind noise at 2m/s (0 dB SPL = 20?Pa.)  
*[7] 0 dB SPL = 20? Pa.  
*[8] The values for dimensions are approximate.