FiiO has designed the new K9 Pro using two high-performance ES9038 Pro DAC chips from Sabre Technologies. The ES9038 Pro is a flagship-grade 8-channel DAC that is capable of providing ground-breaking performance in decoding high-resolution audio signals. FiiO has upgraded the K9 Pro ESS from the OG K9 Pro in terms of DAC count, the OG K9 Pro has only a single AK4499 DAC, the latest K9 Pro here has dual ES9038 Pro DAC Chips. With the help of this new DAC chipset, the K9 Pro ESS achieves ultra-low THDN<0.00025% and high SNR>129dB ratings ensuring a super-clean performance.nnPowerful Signal Amplification CircuitnnConsisting of two high-performance THX AAA 78 amplifier chips, the K9 Pro ESS provides a clean and powerful output signal. It brings the best out of our connected headphones/in-ear monitors with its clean output power signal. There is no noticeable background noise or distortion even with highly-sensitive headphones and in-ear monitors, simply plug in your favou.