Sony STR-ZA3100ES Help Manual page 52

Monaural audio cable (not supplied)
Speaker cable (not supplied)
Audio cable (not supplied)
Stereo power amplifier (not supplied)
After you have made the bi-amplifier connection, set [SB Speaker Assign] to [Bi-Amp] in the [Speaker Setup] menu.
Note
After you have installed and connected your speakers, set the speaker pattern to [5.1.2 (TM)] using [Speaker Pattern] in the
[Speaker Setup] menu.
You can only set [SB Speaker Assign] if a speaker pattern in which speakers are not connected to the SPEAKERS SURROUND
BACK/HEIGHT(FRONT B/BI-AMP/ZONE 2) terminals is selected.
Connect speaker cables properly with the polarities (+/–) matched between the speaker cables and the SPEAKERS terminals.
Related Topic
Locations and names of speakers
Installing 5.1.2-channel speaker system with bi-amplifier connection (for STR-ZA3100ES/STR-ZA2100ES)
Speaker configuration and speaker pattern settings
Assigning the surround back speaker terminals (SB Speaker Assign)
Selecting the speaker pattern (Speaker Pattern)
How to connect speaker cables
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