I bought the amp for my living room where my MiniMac stands. The amplifier is recognized by my Mac as a sound card, the transmission is much clearer than on my Blue-ray player (via RCA), since digital ("lossless"). Also pleased I am with the sound on my AppleTV, which is connected via optical digital input. Have the amplifier to different speakers tested hitherto best he harmonizes with the Dali Ikon 5 mk2. For comparison, I have a 400 Euro NAD connected, did not come to the small DA2 in terms of dynamics and resolution zoom. At a B & W 683 the DA2 unfortunately lacked a bit of power. With everything that is called compact speaker comes of Agron DA2 cope perfectly. And if desired can be directly on the amplifier has an active subwoofer Connect. I do not know what I would improve, except for a headphone jack. Nevertheless 5 stars.