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The Sony ECM-90 Electret Condenser Microphone is an ultra-compact, dual-diaphragm omnidirectional microphone capsule.
The ECM-90 has a flat-and-wide frequency response of 20 Hz to 20 kHz, a dual-diaphragm mechanism that reduces the cable noise and a splash-proof design built to withstand every-day use.
The ECM-90 is available with two different connectors
ECM-90BC comes with a Sony 4-pin (SMC9-4P) connector
ECM-90LM comes with a 3-pin Lemo connector
| Capsule Type | Electret Condenser |
| Frequency Response | 20 Hz to 20 kHz |
| Directivity | Omni-directional |
| Sensitivity *[1] | BC Type. －38 dB (12.6mV) LM Type. 40 dB (10mV) |
| Output Impedance *[2] | BV Type. 2.5 kΩ (unbalanced) LM Type. 6.3 kΩ (unbalanced) |
| Dynamic Range (typ.) | 99 dB |
| Signal-to-Noise Ratio (typ.) *[3] | 68 dB |
| Inherent Noise (typ.) *[4 | 26 dB SPL |
| Wind Noise *[5] | 45 dB SPL or less (with supplied windscreen) |
| Maximum Input Sound Pressure Level (typ.) *[6] | 125 dB SPL |
| Connector | BC type. Supplied with Sony 4-pin (SMC9-4P) connector LM Type. 3-pin Lemo connector |
| Mic Cable |
BC Type. 3.9 feet/1.2 m LM Type. 5.2 feet 1.6m |
| Power Requirements | BC Type. DC 1.1 V to 10.0 V LM Type. Supplied from Sony wireless system transmitters |
| Dimensions *[7] | 5/32 x 5/32 x 21/26 inches (Mic head) 3.5 x 3.5 x 20.5 mm (Mic head) |
| Mass (microphone body, excluding cable) | Approx. 0.035oz Approx. 1g |
| Supplied Accessories | Urethane type windscreen (1) Single/vertical type tie clip (1) Single/horisontal type tie clip (1) Operating instructions (1) |
| Optional Accessories | Wind screen pack Vertical clip pack Safety clip pack Horizontal clip pack Double clip pack Color windscreen pack Black windscreen pack Accessory kit |
