The "point 1" (.1) channel of a surround system is one of the most confusing terms for consumers. Point 1 refers to the LFE or subwoofer in a surround system. The LFE, or point 1, only plays low-frequency audio material, yet receives its own discrete signal, so that mixing engineers can specifically send the deep bass to the subwoofer where it can best be reproduced in a home theater system.
In a 10.2 system, two LFE channels are used.
For more information, visit our Subwoofer Review section.