Sony 154277421 ECM-AC2 Calibration Measurement Microphone

The Sony ECM-AC2 Calibration Measurement Microphone is a purpose-built accessory designed to work with Sony's auto-calibration systems found in their AV receiver lineup. When connected to a compatible receiver's calibration input, the microphone captures audio test tones from each speaker in your home theater setup, allowing the receiver to automatically adjust output levels, speaker distances, and frequency response for optimal sound balance at your listening position. With compatibility spanning roughly 150 Sony receiver models, it serves as a reliable replacement or backup for the calibration mic that originally shipped with your system.

Weighing just 1.44 ounces and featuring a unidirectional polar pattern, the ECM-AC2 is engineered to capture directional audio measurements with a signal-to-noise ratio of 75 dB. It connects via a standard 3.5mm mono jack, making setup as simple as plugging it in, placing it at your primary seating position, and running the receiver's calibration routine. While it serves a narrow purpose, it is an essential tool for anyone looking to get the most accurate and balanced sound from their Sony home theater without resorting to manual speaker-level adjustments.