Audioengine D3 Portable DAC & Headphone Amp The quality of most computer headphone outputs isn't generally very inspiring, so the D3 provides a better option by streaming audio from your computer's USB port and directly connecting to your music system or headphones. The D3 DAC is the perfect way to get greatsounding music not only from your computer to headphones but also from your computer to any music system. D3 will process digital audio at any bit depth up to 24 bits and any native sample rate to 96KHz. With it's high signaltonoise ratio and low distortion, the D3 delivers sound quality generally heard only in more expensive DACs. The highperformance headphone amplifier was designed for a wide range of headphones and will satisfy even the most demanding headphone enthusiast with its high output and revealing sound. The D3's asynchronous data transfer carefully controls USB streaming audio from any computer which greatly improves audio performance.