“While AudioEngine is know more for their bookshelf speaker line, they did have their D1 and D2 products on display. The D1 is a $169-ish priced DAC with optical and USB inputs. This unit can also be powered via USB. The D2 DAC/wireless streamer did an excellent job (from what I could discern in the noisy listening area) of retaining the sound quality of the music to the receiving unit placed across the room.” —— audio-head.com