Not many can afford the beautiful but terrifyingly expensive systems that audiophiles listen to. One tip that will immediately improve the sound quality of even the most meager stereo is to use speaker stands. We have done it in our own home, and while we are not gifted with golden ears, the difference was significant. These pieces of MDF not only raise your speakers to a more appealing height, they can greatly enhance the sound reproduction ability of low-end speakers.
Even bookshelf speakers placed on your desk can benefit with stands, as shown here with this DIY solution.
Stands can be purchased from manufacturers like Sanus or constructed easily to suit the specific dimensions of your speakers (remember these concrete speaker stands?). The whole point of speaker stands is to eliminate or reduce excess vibration caused by the speaker cabinet (aka "colouration"); the removal of extra vibrations results in more accurate sound reproduction/distortion, even with cheaper model speakers are positioned on a simple stand (it seems speaker cones or spikes do not offer the same merits, though rubber feet do help). This makes speaker stands an excellent and fairly affordable investment to make, whether for an existing system or a future sound system upgrade.
Recommended Speaker Stands: