The XDUOO XD-05 Basic Headphone Amplifier ESS9018K2M is a portable headphone amplifier that provides high-quality and high performance for game audio and video with its compact structure. It has an audio processor of ES9018K2M and a signal-to-noise ratio (SNR) of 115dB. The amplifier has a gain of +6dB/9dB/16dB and a bass upgrade of 0/+6 db. The frequency response for USB/FIBER/COAXIAL is 20Hz ~ 20 kHz (±0.5 dB) and for AMP it is 10 Hz~60kHz (±0.5dB). The harmonic distortion for USB is 0.0025%@1kHz, Coaxial is 0.0025%@1kHz, Optical Fiber is 0.0025%@1kHZ, and AUX IN is 0.0018%@1kHz.
