The Audio Note (UK) DAC0.1x converter is a digital-to-analog converter equipped with the Philips TDA1543 stereo D/A converter chip and features a 6111WA valve zero feedback output stage. The Philips TDA1543 is a popular digital-to-analog converter chip known for its high-quality audio performance, and the 6111WA valve zero feedback output stage is a vacuum tube-based output stage that is known for its warm and smooth sound characteristics.

The DAC 0.1x utilizes the 1x oversampling™ direct from disc™ circuit topology, which is a technology that claims to eliminate the need for correction measures commonly found in other digital-to-analog converters (DACs). This approach presents the digital signal directly to the converter after reformatting, without the need for oversampling or other correction techniques, which preserves the integrity of the original digital audio signal and deliver a purer and more natural sound reproduction.