A label such as 5.1 or 7.1 describes a system configuration rather than a completed room plan. Speakers must suit the seats and their intended channel roles. Side surround positions are particularly easy to confuse with rear channels. Use the layout diagram for the exact configuration and begin with the main listening position.
Record the actual configuration
Draw a simple plan showing the screen, sofa and existing speakers. Label every channel. A system with height channels distinguishes those separately; they are not merely more speakers behind the listener. Check which channels the receiver can actually amplify and address.
Dolby provides separate placement guides for different home configurations. Select the appropriate one instead of combining angles or positions from several diagrams. Professional mixing-room guidance is also not an unchanged shopping list for a living room.
In a 5.1 system, surrounds do not automatically belong directly on the wall behind the sofa. Their role and position differ from the additional rear channels of a 7.1 arrangement. Follow the relevant diagram and requirements of the particular speaker design.
A sofa contains several listening positions
A surround speaker immediately beside an outer seat may be much more prominent there than in the centre. Check more than the main seat. A system impressive for one listener may be unbalanced for everyone else. Consider whether distance or position can be adjusted within permitted arrangements.
Calibration requires the procedure described by the manufacturer. Use the intended microphone position and avoid continually changing conditions during measurement. Calibration can adjust levels and timing but cannot remove furniture obstructing a speaker.
If the room cannot sensibly accommodate the desired channel count, a smaller properly configured system is a real option. Do not mark additional channels present in menus when suitable speakers are not connected. Configuration must describe the actual installation.
Check using movement and speech
After setup, use a familiar passage and the equipment's test functions. Are channels assigned correctly, and does dialogue remain where intended? Movement through the space should not be perceived merely as a loud isolated burst beside one seat. Keep comparison levels constant.
Record positions, channel assignments and the calibration used. If furniture moves later, you can identify which assumptions no longer hold. A new cabinet or changed sofa position may justify checking again even when the electronic equipment itself remains unchanged.