5.1 is a common name for six-channel surround sound multichannel audio systems used in home theaters and commercial cinemas. It uses five full bandwidth channels and one low-frequency effects channel, which is why it is called "five-point one". The five channels are Front Left (FL), Front Right (FR), Center Channel (CNT), Surround Left (SL), and Surround Right (SR), while the low-frequency effects (LFE) channel is designed for a subwoofer. The main goal of 5.1 surround sound in music is to provide proper localization and equability of all acoustic sources for a center-positioned audience. All 5.1 systems use the same speaker channels and configuration.