Manually select the first 8 resistors of the array and compensate for the resistance values using wafer resistors. The effect of doing so is to make the accuracy of the resistor array far exceed one ten thousandth, completely solving the problem of bottom noise. The operational amplifier supports plug-in replacement and has strong playability. Supports both coaxial and USB interface input, compatible with all , comes with volume adjustment function for headphone connection, supports RCA, 3.5, 4.4 output. Supports both home and car use. The double-layer motherboard design compresses the size to 10x12x3cm, which is very exquisite.
The main features of this decoding are a large sound field, high dynamics, thick and smooth vocals, delicate high frequencies, strong low frequencies, strong spatial sense, precise positioning, and very durable listening. Compared with the previous generation, it has improved the signal-to-noise ratio and reduced the background noise, while increasing the simulated flavor and low-frequency atmosphere.
The upgrade points for V4.0 are as follows:
Upgrade crystal oscillator: Customized 0.1ppm, TCXO temperature compensated crystal oscillator.
Upgraded shell: All aluminum alloy anodized black oxidation.
Upgrade operational amplifier: Original 4625-2, one-step solution.
Upgraded connectors: Customized connectors with thick gold plating are used.
Upgrade potentiometer: potentiometer to eliminate bass distortion.
Upgrade power supply: The entire board is equipped with Sanyo capacitor filtering, using multi-stage linear stabilizing LDOs such as LT1764, TPS7A, LP5907, etc., to control the ripple at the UV level.
Upgrade resistor array: In case of precision resistor+Vishay wafer resistor, the area will double, the scale will double, and the precision will double.
Operational amplifier plug-in design, with strong playability.
package include： DAC*1 12V power adapter*1 Data cable*1 （0.8m）
