JAMO DVR 50 Instruction Manual page 8

Note: Some 4:3 TV screens can display 16:9 format.
To get the best possible sound select the type of
front speakers you have connected.
You can always go back and start again if you happen to do something wrong, or if you wish to enter the Setup menu and edit it.
10
Speaker Type
TV
This screen presents two different types of TV
formats: 4:3 (normal) or 16:9 (wide screen).