With S/PDIF these guys are crystal clear.

Crystal clear audio with good depth and highs, and great volume

These speakers are so crystal clear it blows me away

Now, I'm no audiophile and some people have said in other reviews that these speakers admit a hum or a buzz or a rattle but they sound pretty crystal clear to me.

They are crystal clear, provided the music input is crystal clear as well

Having two inputs is certainly a plus, as well as having a headphone