220V Professional Version 2xAK4499EX HiFi Audio Decoder Class A Headphone Amplifier with 5pcs USB7601 Chips for SITIME

220V Professional Version 2xAK4499EX HiFi Audio Decoder Class A Headphone Amplifier with 5pcs USB7601 Chips for SITIME

Difference:
- Tuning version: Using 5pcs self-developed temperature compensated PLL femtosecond for tuning. XMOS USB interface adds ADI-4166 USB high-speed 480M isolation chip.
- Professional version: The USB port uses CT7601 (with official driver) and 5pcs femtosecond chips for SITIME.

Highlights:
Advanced Digital Processing Solutions:
(1) The USB input uses XMOS216. For Windows comes with the official driver from Thesycon in Germany, supporting source code DSD512, PCM768K.
(2) The whole machine has a total of 5 temperature compensated femtosecond crystal oscillators, and the clocks in the two core parts are frequency locked using phase-locked loop circuits.
(3) Digital processing and DAC are powered by a single 33000uf capacitor for the first stage filtering, followed by multi-level digital voltage stabilization. The cascading of digital signals adopts buffer driving to ensure accurate and timely signal transmission.
(4) The jitter elimination circuit adopts a professional audio IC from the recording studio.

Advanced Simulation Architecture:
(1) The DAC analog power supply adopts uv grade LDO. Due to the analog amplifier and headphone amplifier power supply require larger currents, it uses independently designed discrete component uv grade circuits.
(2) Analog left and right channels at both ends of the circuit board, isolated in the middle, with a separation of 135db.

Advanced Tuning Strategy:
(1) Providing S1 balance and S2 sweet mode dynamic selection (remote control), using analog components for tuning.
(2) Refusing to switch power supply, this machine uses 4x25W transformers with sufficient margin, and the sound is loose, natural, and transient fully loaded.

Specification:
- Product size: 448 x 398 x 108mm, 17mm foot
- Net weight: 13kg
- Transcoding capability: CD format can transcode DSD64 and DSD128
- Analog output interface: one set of fully balanced XLR and one set of single ended RCA outputs
- Digital input interface: IIS, USB, COAX, AES, OPT, CLOCK
- Decoding capability:
  (1) USB and IIS port bit-rate: using XMOS216 chip for receiving, PCM44-768K, DSD64-512 (USB supports for ASIO)
  (2) COAX AES port: PCM44-384K, DOP64-128
  (3) OPT fiber port bit-rate range: PCM44-96K, DOP64
  * WAV FLAC, DSF, DFF, ISO APE, and other file formats are essentially classified into PCM and DSD, and can be decoded by this machine.
- External clock interface: BNC interface, 11.2896MHz, adaptive 50ohms and 75ohms impedance
- Mobile OTG: Systems for iOS 10 and Android 10 and above can be connected to the local USB port through an OTG cable without the need to install drivers. The highest bit rate for iOS system on cellphone was measured to be 192K. For Android using Hiby Music can support PCM44-384K, and DSD is compatible with DOP128. USB port support for Apple Music, actual measured source code up to 24 0 192K.
- High fidelity rate: 99.9999%
- Bottom noise: 0.000002v
- Sensitivity: 105dB
- Power supply ripple peak value: -135dB at 1K 0dbfs
- Separation: 135dB at 1K 0dbfs
- Transformer: 100W (4 x 25W square transformer, 2 x digital + 2 x analog)

Package Included:
- 1 x Host
- 1 x Power Cable
- 1 x USB Cable
- 1 x Coaxial Cable
- 1 x Remote Control

Driver:
- USB drivers are required for WIN10 and WIN11 only, and our store provides genuine driver downloads. Other interfaces as well as systems for LINUX and MAC do not require driver installation.
- Download: https://pan.baidu.com/s/1AcCojq4A7aoyN1wh5EcivQ?pwd=8888
- Passwords: 8888