I agree that the sound quality depends on the quality of the DAC. The DAC is used only in the output stage (before the speakers) after the signal has been amplified.
Digital amplifiers like these should give a better S/N ratio, thus blacker background, since low level signals from the source is not being processed i.e. converted to analog and passed through a preamplifier, where the chances of introducing noise is high. The PCM digital signal from the source is amplified by converting PWM. The amplified digital signal is converted to analog at the output stage.
Digital amplifiers like these should give a better S/N ratio, thus blacker background, since low level signals from the source is not being processed i.e. converted to analog and passed through a preamplifier, where the chances of introducing noise is high. The PCM digital signal from the source is amplified by converting PWM. The amplified digital signal is converted to analog at the output stage.