Onkyo TX-RZ740 Instruction Manual page 43

Contents Connections Playback Setup
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(Example 5) Use Dolby Enabled Speakers (Surround Back) at the rear
 
 
The Dolby enabled speakers are the special speaker that the sound is emitted
toward the ceiling, and have the effect the sound to come from above by
reflecting the sound on the ceiling.
The Dolby enabled speakers (surround back) are installed on top of the surround
back speakers.
11,12 Dolby Enabled Speakers (Surround Back)
❏ Speaker Layouts and Selectable Listening
Modes ( p125)
43
Front Panel≫ Rear Panel≫ Remote≫