This article explains the terms "pixel" and "megapixel." They are commonly used terms related to digital imaging devices especially digital cameras and camcorders.
A subwoofer reproduces the audible low frequency sound. Sometimes it is called LFE (Low Frequency Effects) channel. A good subwoofer can shake you up and make you feel the sound....
When you are sitting in a cinema hall and watching the movie, you are not aware how the picture is displayed or how the sound is heard. But if you are trying to buy a home theatre...
