Most people have MP3s on their computer, compressed audio files that don't sound as good as records or CDs, but don't take up much space. But audiophiles, if they use their computer for music, are more likely to have uncompressed files such as FLACs that don't leave any audio quality out. For them, there's the Neuhaus T-2 Amplifier.
This $800 amp takes the music playing from your computer, converts the sound to analog and then amplifies it using vacuum tubes, making the sound warmer and richer. Think of it as a way to make your music sound like it's being played from a record player when it's really being played from your laptop. Just don't waste its power on MP3s.