I recently purchased a Sharp LC26SV490U 26-Inch 1080p LCD TV - Black
, which has a wonderful picture but just passable sound (as most lower-priced flatscreens do). Since I'm working with limited shelf space around the TV, I decided to give these compact little Altec speakers a try -- I figured for only $11, they were worth a shot. And I'm very pleased with said shot: they've done wonders for the sound quality on the TV. The sound is much more even now at all levels, and I had to turn the speaker volume up to full to get any distortion (to avoid having to play with the volume on the actual speakers, I just set their volume to one high-ish level and have continued to use the remote to adjust the volume on the TV itself). The speakers also plug right into the TV's USB port, which is nice because then they power off when I turn off the set.
If you're looking for a surround-sound, bass-drowning listening experience then you'll probably want something more intense than these, but if you're just looking to improve the sound quality on your TV or computer, then I highly recommend these.