Marantz NR1604 Owner's Manual page 88

Speaker connection
Connecting 6.1-channel speakers using one surround back
speaker
If using only one surround back speaker, connect to the "L" side of the SURROUND BACK terminal.
For speaker settings in this case, see "When 6.1-channel speakers are installed" (vpage 80).
To perform 6.1-channel playback using the surround back speaker, set "Assign Mode" to "Surround Back"
in steps 3 to 5 for "Set up "Amp Assign"" (vpage 91).
Also use the "Speaker Config." setting (vpage 124) to set "Surr. Back" to "1spkr".
NOTE
• For speaker cable connections, see page 82.
• For speaker impedance, see page 81.
FL FR
SW
C
SL
SR
SB
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DVD