The Sony HT-DDW750 home entertainment system is a 575-watt speaker system, which consists of a slim center speaker, four satellite speakers, and a single 75-watt subwoofer. The subwoofer in this Sony Home Theater System features an adjustable knob to control bass levels. A pre-programmed remote control is also included in this Sony HT-DDW750 home entertainment system, which can be used to navigate the 30 preset (AM/FM) radio stations and more. This 575-watt speaker system is designed to deliver cinema-quality surround sound with in-built Dolby Digital, DTS, Dolby Pro Logic, and Dolby Pro Logic II decoding. The five speakers in this Sony Home Theater System feature 100 watts of audio output, providing a full range of volume capabilities. With coaxial and optical digital input options, the Sony Home Theater System can be connected to both audio and video sources for a complete home cinema experience. The entire system has a magnetic shield to prevent electromagnetic interference.