CS43198 × 8 : Octa DAC Chip Matrix The CS43198, a Cirrus Logic flagship DAC chip, has an excellent dynamic range, outstanding resolution of micro details, and an impressively low noise floor, adding up to exceptional performance. The Octa DAC Chip Matrix with our implementation guarantees both superb sound quality and DAP leading measurements. THD+N hits -123dB, the best among portable players. This groundbreaking achievement sets a new standard in the industry. The more the merrier. Taking the advantage of quantity to achieve better quality and achieving extraordinary results. FPGA-MASTER 2.0 : The Evolved Audio System Controller After years of algorithm development, our FPGA-Master has entered generation 2.0. As the audio system controller, it directly requests audio data from the SoC and plays a major role in signal reproduction and maintaining signal integrity. It synchronizes and generates all audio clocks utilizing two NDK femtosecond oscillators to achieve a fully synchronized single clock source. The FPGA-Master 2.0 also haspicosecond-level precise control and adjusts the DAC clock, data, and constructs the FIR filter. FIR Filter : The DAC Matrix Magician Thanks to the new algorithm of FPGA-MASTER2.0, the potential of the 8pcs CS43198 can be further explored and developed. Synchronous parallel output mode : This reduces "discrete distortion" between DACs to improve overall performance. FIR 2x mode, FIR 4x mode: With FPGA-MASTER 2.0, picosecond-level precise control and adjustment of the DAC clock and data is achieved, making each DAC data stream independently adjustable. Through the "delay parallel" of 4 DACs, the DACs form a hardware analogy FIR filter, which averages the differences between multiple DACs, reducing distortion and effectively improving sound details and realism. Android11 + Mango OS / Open OS + Closed Linux OS The DX260 comes with the latest Android 11 system, allowing you to easily install streaming APPs for a seamless Android experience. The DX260 efficiently bypasses the SRC at the system level. Whether it's Mango Player or a third-party streaming APP, you can take advantage of the system-level "Non-SRC" feature giving you the highest quality sound from the recording. The DX260 features the Mango OS, a Linux-based audio system that has been meticulously designed for exceptional audio playback. It has accumulated a lot of optimization to the underlying driver algorithms, which focuses on audio playback. This pure sound system has no WiFi or Bluetooth interference, it has lower EMI, and a purer listening experience. New ID Design : User Removable Back Cover Introducing our new ID design, complete with the return of volume control guards and a more industrial look. The back cover is easily removable with total battery access making replacement of the battery very convenient.