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Sony ECM-77BC Miniature Omnidirectional Lavalier Microphone with 4-Pin Sony Hirose Connector (Black)


Key Features

    • For TV, Stage, Journalism & Broadcast
    • Omnidirectional for Consistent Levels
    • Compatible Hirose Transmitter List Below
    • Easily Concealable
    • Attached 3.9′ Cable
    • Requires 3 to 10 VDC
    • Includes Windscreen & Tie Clip
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The black Sony ECM-77BC is a miniature omnidirectional lavalier microphone designed for professional broadcast, sound reinforcement, and recording applications. The condenser mic element's tiny profile allows it to be easily concealed in performance and broadcast situations.

The omnidirectional polar pattern provides even frequency and sensitivity response at the direct and off-axis sections of the microphone capsule, helping to provide consistent levels, even if the talent isn't speaking directly toward the mic.

The ECM-77 provides a wide frequency response of 40 Hz to 20 kHz for accurate reproduction of speech and vocals and requires 1.1 to 10 VDC power from a compatible wireless transmitter or similar device. A windscreen to reduce wind and breath noise and a tie clip to attach the mic to clothing are included.


4-Pin Sony Hirose Connector

Compatible Transmitters
  • Sony: Works with Sony transmitters equipped with a 4-pin Sony Hirose connector including the DWT-B30 and DWT-B01.
  • Third-Party Devices: The ECM-77 will work with many third-party wireless transmitters and portable audio recorders that are equipped to supply 1.1 to 10 VDC through a 4-pin Sony Hirose connector.

Dependable Performance

Small Size
The ECM-77's capsule is 1/4" in diameter and 1/2" in length, allowing the mic to be used on stage or on camera while remaining inconspicuous.

Headroom for Standard Speech and Vocal Applications

The mic can handle up to 120 dB SPL without distortion—adequate headroom for most presenters, performers, and instructors.

Omnidirectional Polar Pattern

The forgiving omnidirectional polar pattern picks up sound from all around the mic and provides a consistent frequency response, even for off-axis sound. This helps to supply clear, intelligible speech and vocals, even when the talent turns away from the microphone.

Wide Frequency Response

With its 40 Hz to 20 kHz frequency range, the ECM-77 provides accurate and transparent reproduction of speech, vocals, and instruments.


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Sony ECM-77BC Specs


Form Factor
Compatible Transmitters
Sony: (Transmitter Models Unspecified)
Sound Field
1 x Electret Condenser
0.2″ / 5.6 mm (Electret Condenser)
Polar Pattern
High-Pass Filter
Foam (Included)


Frequency Range
40 Hz to 20 kHz
Maximum SPL
120 dB SPL
2.5 Kilohms ± 30% at 1 kHz
-39 dB at 1 kHz
Dynamic Range
90 dB
Signal-to-Noise Ratio
64 dB A-Weighted
Equivalent Noise Level
30 dB


Output Connector
1 x Hirose 4-Pin
Cable Length
3.9′ / 1.2 m
Cable Diameter
0.1″ / 2 mm


Operating Voltage
1.1 to 10 V
Operating Current Consumption
0.4 mA


Included Mounting & Placement Accessories
Alligator Clip
Mounting Thread Size
Included Mount Has No Threading
Operating Temperature
32 to 140°F / 0 to 60°C
Storage Temperature
-4 to 140°F / -20 to 60°C
ø: 0.2 x L: 0.5″ / ø: 5.6 x L: 12.5 mm (Capsule)
0.9 oz / 25.5 g