Sony STR-ZA3000ES User Manual page 170

Center speaker
Surround speaker (Left)
Surround speaker (Right)
Subwoofer
Hint
As the subwoofer does not emit highly directional signals, you can place it wherever you
want.
7.1-channel speaker system using surround back
speakers
You can enjoy high-fidelity reproduction of recorded sound from DVD or Blu-ray Disc
software in 6.1-channel or 7.1-channel format.
Front speaker (Left)
Front speaker (Right)
Center speaker
Surround speaker (Left)
Surround speaker (Right)
Surround back speaker (Left)
Surround back speaker (Right)
Subwoofer
6.1-channel speaker placement
Place the surround back speaker behind the listening position.