Sony ECM-674

The ECM-674 is an affordable shotgun-type electret condenser microphone, which delivers excellent sound performance in field and studio productions.

Superb Sound Quality
The ECM-674 offers an excellent sensitivity of -36 dB (0 dB=1 V/Pa.) and low inherent-noise level of less than 17 dB SPL. This allows the microphone to be used for clear voice pick-up even in noisy environments
Two-way Powering
A two-way powering capability allows the ECM-674 to be driven by microphone power or batteries, making it suitable for both camcorder mounting and many other sound-gathering applications. Internal: AA-size battery operation. External: DC (40 to 52 V) operation
Built-in Battery Liquid Leakage Protection Circuit
In general, old batteries can leak and damage the equipment they are used in. The ECM-674 prevents this by continually detecting the output voltage of the battery and shutting off the power supplied to the electric circuit whenever the voltage drops beneath a certain threshold.

Capsule Type Mono Electret Condenser
Frequency Response 40 Hz to 20 kHz
Directivity Uni-directional (super-cardioid)
Sensitivity *[1] -36 dB ±3 dB
Output Impedance *[2] 220Ω±20%, Balanced
Dynamic Range Phantom: 107 dB or more
Battery: 98 dB or more
Signal-to-Noise Ratio *[3] 77 dB or more
Inherent Noise *[4] 17 dB SPL or less
Induction Noise From External Magnetic Field *[5] 0 dB SPL or less
Wind Noise *[6] 50 dB SPL (without windscreen)
45 dB SPL or less (with windscreen)
Maximum Input Sound Pressure Level *[7] Phantom: 124 dB SPL
Battery: 115 dB SPL