Infinity REF-704a Owner's Manual page 7

INFINITY REFERENCE
° 3-channel operation: Connect the stereo speakers to the Front terminals, as described above. Connect the single speaker's +
lead to the Rear L+ terminal, and the - lead to the Rear R- terminal.
Left front speaker
° 2-channel (bridged) operation: Connect one speaker's + lead to the Front L+ terminal, and the - lead to the Front R- terminal
Connect the other speaker's + lead to the Rear L+ terminal, and the - lead to the Rear R- terminal.
4-ohm subwoofer
Right front speaker
4-ohm subwoofer
4-ohm subwoofer
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