Marantz Stereo 70S 2.1-Channel Network A/V Receiver - Manual (Page 31)

Second pair of speaker
This system enables switching playback between speakers A and B as desired.
SW
L L
(B) (A)
R R
(A) (B)
CAUTION:
0
Set speaker impedance to “4ohms” before performing simultaneous
playback from speakers A and B. ( v p. 28)
SW R (A) L (A) R (B) L (B)
Contents Connections Playback Settings Tips Appendix
31
Front panel Display Rear panel Remote Index