The NJW1107 is a Dolby Pro Logic Surround Decoder with discrete 5.1ch input. It includes Dolby Pro Logic Surround decoder, 4 master volumes, 4 level trimmers and 6 switches. The 6 switches choose internal Dolby Pro Logic Surround Decoder or discrete 5.1ch inputs. The NJW1107 is most suitable for AV amplifier with discrete 5.1ch inputs for Dolby Digital. In addition to Dolby Pro Logic Surround function, the NJW1107 performs easily other surround function such as Hall, Live, Disco and others, and echo and microphone mixing functions for Karaoke.