iBasso DC03PRO Dual CS43131 Flagship DAC ear amplifier adapteriBasso DC03PRO Dual CS43131 Flagship DAC Main Features Dual CS43131 Flagship DAC: Utilizes Cirrus Logic's CS43131 chips, renowned for outstanding sound quality and precise tuning. KDS Femtosecond Oscillator: Enhances clock accuracy and reduces phase noise for a purer listening experience. High Performance Specifications: SNR of 127dB, THD+N of 114dB, output impedance less than 0. 12. Extremely Low Noise Floor: Measured noise floor is less than 0. 9uV,