Operation Manual

Chapter 4: Configuration
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Note: If your speakers are not capable of outputting the low frequency 120
Hz signal, it is recommended that you reduce the LFE option to avoid
damaging your speakers.
Dolby Pro Logic IIx (Optional)
Dolby Pro Logic IIx has three options: Movie Mode for watching
movies, Music Listening for listening to music, and DDEX Mode for
enhanced surround sound).