The Audio-GD HE-8 is a massive R2R DAC featuring a high-end design based on high-quality components and symmetrical architecture. It features a conversion stage based on 4 PCM1704U-K DAC chips, discrete audio circuits, an Accusilicon femtosecond clock, FPGA clock control, and Class A power supplies isolated in a regenerative system.
Features
The built-in regenerative power supply acts as an electrical generator. It blocks most of the noise in the power line, providing clean power to the amplifiers and producing neutral analog sound. With this architecture, the AC current passes through the regenerative input transformer, is converted to DC and sent to the Class A power supply, and then to the regenerative wave generator and amplification stages.
A regenerative regular wave generator produces a very low distortion 50Hz wave that passes through the amplifiers and output stages. Regenerative transformers produce a clean AC source that feeds separate Class A power supplies for the left and right channel preamplifiers.
A parallel Class A power supply has a very high input impedance to prevent interference from the power supply from affecting the signal, and a low output impedance with very high speed and linearity.
The final stage of the signal is the analog output, which can have a significant impact on the sound quality of the DAC. After digital-to-analog conversion in R2R DA
Audio-GD HE-8 Specifications:
- Product Type: R2R DAC
- DAC chips: 4x PCM1704UK
- Inputs: 1x AES/EBU/1x Optical Toslink/1x Coaxial/1x BNC/1x I2S via HDMI LVDS/1x USB-B/1x Software Update Port
- Outputs: 1x single-ended RCA/1x balanced XLR/1x balanced ACSS
- Signal to Noise Ratio (SNR): > 120 dB
- Output impedance: 5 Ohm
- Output level: RCA: 2.5V/XLR: 5V/ACSS: 2+2mA
- Frequency response: 20 Hz – 20 kHz
- Total Harmonic Distortion (THD): 0.01%
- Input sensitivity: Coaxial 75 Ohm: 0.5Vp-p/Optical: 19dBm
- Compatible OS (USB): Windows, OSX, Linux, ISO
- Supported sampling rates: USB, I2S: PCM up to 32-bit 384 kHz / Coaxial, Optical: PCM up to 24-bit 192 kHz
- Power voltage: 220-240V AC 50/60Hz
- Consumption: 48W
- Dimensions: 430 x 445 x 80 mm
- Weight: 12 kg
- Color: black
