The D3 DAC may be the perfect solution for your portable needs if the built-in DAC on your notebook/ MacBook just doesn't cut it. The linear and clean response should excite most audio enthusiast that like the reference sound.

Speaking of Audioengine's D3 USB DAC, have a go at Hardware Canucks's video review (embedded above), which in my opinion, is the most-helpful D3 review out there. Actually, Hardware Canuck's reviews of products from mice to cameras, are incredible.

My review will be out this evening at Headfonia.