If you want to get away from your computersuperior audio quality, you should pay attention not to the computer speakers, and audio equipment, in particular - good speakers and amplifier (or receiver).
Unfortunately, the amplifiers are not always compatible with the computer sound card output.
However, it is just a matter remedied.
If you are dealing with high quality and inexpensive,even if it is obsolete, amplifier Soviet times, the easiest way to buy a cable adapter that allows you to connect the amplifier to the output of the sound card. In most cases this will be minijack adapter - 5DIN, common for all radio markets and shops and cheap standing. If you buy the adapter fails, it is possible to solder it yourself, producing pre-minijack connectors and 5DIN. Thus it is necessary to know the following: the second contact connector 5DIN - weight (he's the top), the 3 rd and 5 th - left and right speakers, respectively.
For a more modern amps you need even more common minijack adapter - RCA (they are the same - "tulips").
If your amplifier (or receiver) hasdigital input, its use would be the best option. Pick appropriate for your sound card and amplifier input cable (koaksil or fiber) and enjoy the sound.