Sony ECM-77B Miniature Omni-directional Lavalier Condenser Microphone (Lapel Mic)

Electret Condensor miniature lavalier microphone, omni-dir, XLR 3-pin connector

£465.00 £387.50
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Sony Miniature Omni-directional Lavalier Condenser Microphone (Lapel Mic) - ECM-77B


A professional discrete omnidirectional lapel microphone

The ECM-77 is probably the most often seen lapel microphone on TV and it is used widely in both studio production and on location. Its popularity is based on a combination of excellent sound quality, robust construction and attractive cosmetic design. This microphone is the ECM-77B XLR3 version with power barrel for use as a wired microphone.


Capsule Type
Electret Condenser
Frequency Response
40 Hz to 20 kHz
Sensitivity *[1]
B Type. -52.0 dB ±2 dB
BC Type. -39.0 dB (11.2 mV)
BMP Type. -39.0 dB (11.2 mV)
BPT Type. -39.0 dB (11.2 mV)
Output Impedance *[2]
B Type. 150Ω±20%, Balanced
BC Type. 2.5kΩ±30%, Unbalanced
BMP Type. 2.5kΩ±30%, Unbalanced
BPT Type. 2.5kΩ±30%, Unbalanced
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
B type. Supplied with XLR-3-12C (male) connector in power supply unit (single AA size battery)
BC type. Supplied with Sony 4-pin (SMC9-4P) connector
BMP Type. Supplied with o3.5 mm, 3-pole mini plug
BPT Type. No connector (Pigtail)
Mic Cable
B Type. 9.8 feet 3 m
BC Type. 3.9 feet 1.2 m
BMP Type.3.9 feet 1.2 m
BPT Type. 9.8 feet 3 m
Power Requirements
B Type. DC 1.5 V (AA size battery) or +48 V phantom power
BC Type. DC 1.1 V to 10.0V
BMP Type. DC 1.1 V to 10.0V
BPT Type. DC 1.1 V to 10.0 V
Battery Operating Time
B Type Approx. 6000 h (LR6)
Power Consumption
B Type. Internal battery: 0.3 mA or less External battery: 2 mA or less
BC Type. 0.4 mA or less, 
BMP Type. 0.4 mA or less
BPT Type. 0.4 mA or less
Dimensions *[8]
BC, BMP, BPT Type φ 5.6 X 12.5 mm (Mic head) φ 1/4 X 1/2 inches (Mic head)
B Type φ8.5 x 14.5 mm (Mic head) φ20.0 x 126 mm (Power unit XLR type) φ13/16 x 5 inches (Power unit XLR type) φ11/32 x 19/32 inches (Mic head)
B Type. Approx. 4.3 oz (with power supply unit) Approx. 121.5 g (with power supply unit)
BC Type. Approx. 25.5 g Approx. 0.9 oz
BMP Type. Approx. 22.7 g Approx. 0.8 oz
BPT Type. Approx. 22.7 g Approx. 0.8 oz
Supplied Accessories
Single/vertical type tie clip (1)
Single/horizontal type tie clip (1)
Operating instructions (1)
Mic case (1)
Metal-mesh type windscreen (1)
Double/horizontal type tie clip (1)
Optional Accessories
Wind screen pack
Vertical clip pack 
Safety pin type clip pack 
Horizontal double-clip pack 
Horizontal single-clip pack 
ECM-77 accessory kit 
Coloured wind screen kit 
Black windscreen for ECM-77
*[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] Dimensions are approximate