Sony DAV-X1V Operating Instructions Manual page 9

This system perfectly decodes 5.1 channel
signal, but you cannot add other commercially
available surround speakers.
* Manufactured under license from Dolby
Laboratories.
"Dolby", "Pro Logic", and the double-D symbol are
trademarks of Dolby Laboratories.
** Manufactured under license from Digital Theater
Systems, Inc. "DTS" and "DTS Digital Surround"
are registered trademarks of Digital Theater
Systems, Inc.
9
US