"Input TerminalsVandersteen 2W subwoofer with a Marantz SR7005
(2) Bananas which accept high-level input
from power amplifier"
This unusual method is expecting you to run the sr7005 in "No sub" mode which then sends all the low bass to the front L and R speaker outs. A secondary set of wires also goes to the sub's banana inputs from these outputs in addition to the normal pair leading to your L and R speakers which you run as "Large".