Yulong A39 Headphone Amplifier and PreamplifierYulong A39 Headphone Amplifier & Preamplifier Key Features: High Performance Audio: Equipped with a constant current Class A 6W balanced headphone amplifier and a reference grade preamplifier, the A39 offers slightly warm tonality and minimal distortion (0. 0002% THD+N, SNR >120dB, crosstalk < 100dB) for pristine, lossless sound. Advanced Volume Control: Utilizes a CPU + FPGA latching relay and R2R resistor network for pure, transparent volume
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