The beautifully sounding DAC on the top chip of the “43xx” line from the Japanese company Asahi Kasei Microdevises - AK4399 (32Bit / 192kHz). This DAC uses a demodulator that is fundamentally different from other competitors' delta-sigma. In his work, there is practically no high-frequency quantization noise, the inevitable evil of delta-sigma, which previously had to be coaxed with a set of filters. The developed power supply system with galvanic isolation allows us to realize almost the entire potential of the AK4399 chip, while a transformer with the following voltages on the secondary windings is needed:
2 x 9V x 1A
12-0-12V x 1A
The module is built on the following chips:
- AK4399 DAC;
- WM8805 transport / converter;
- PCM2706 USB receiver;
- OPA627 two single opamp in the exhaust (can be replaced without soldering);
The ability to adjust the supply voltage for the op-amp allows you to choose almost any operational amplifiers to taste.
Subjectively, this DAC sounds at the level of such famous devices as ESI Juli @ and EMU-0202 USB.
If necessary, it is possible to equip a transformer to power this device.
Components in the photo may differ from the manufacturer in a particular instance of delivery without compromising the quality of the finished product.