The Fiio AM3 has utilized the newly launched amp OPA1622 from Ti, which is exclusively aiming for audio products. The OPA1622 is the newest addition to the Ti Burr-Brown Audio product line, and also an upgrade to the widely used OPA1612. In order to achieve full-channel balanced output, there are six OPA1622 chips installed, which enables the module to support both 2.5mm TRRS balanced output and 3.5mm single-end output with an ultralow THD+N of -119.2 dB (0.000018%), while driving a 32-Ω load at 10-mW output power, 12 times better than the most similar competitive product. Also it can achieve a maximum output power of 150mW before the clipping occurs, thereby provides an interference-free signal channel to the X7 and raises the audio quality to a whole new level.
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