Dolby(R) Pro Logic(R) IIx, Dolby(R) Headphone, Dolby(R) Natural Bass, Dolby(R) Sound Space Expander, Dolby(R) Audio Optimization, Dolby(R) High Frequency Enhancer technologies True5.1-channel surround sound

Headphone, Dolby(R) Natural Bass, Dolby(R) Sound Space Expander, Dolby(R) Audio Optimization, Dolby(R) High Frequency Enhancer technologies True5.1-channel surround sound output High-definition audio support S/PDIF

Sound Room® Audio Enhancement featuring Dolby® Headphone, Dolby® Natural Bass, Dolby® Sound Space Expander), Built-In speakers, Built-in microphone, headphone/Speaker/Line-Out Jack with S/PDIF support7 Warranty

audio enhancement, featuring Dolby® Headphone, Dolby® Natural Bass and Dolby® Sound Space Expander High-definition audio support S/PDIF (Sony/Philips Digital Interface) support for digital speakers

enhancement, featuring Dolby® Headphone, Dolby® Natural Bass and Dolby® Sound Space Expander High-definition audio support S/PDIF (Sony/Philips Digital Interface) support for digital speakers MS-Sound