Help, Anyone?....

I will soon be purchasing a Sunfire True Subwoofer EQ to use with my
Sansui G-9000. I will be using the Pre-amp outputs and Amplifier inputs
(RCA jacks) to connect the sub. I am curious as to if I leave the
switch on the receiver for the Pre amp and Amp in the normal connected
position or in the (1)-Direct Coupled position or in the (2)-Capacitor
Coupled position? I'm afraid to hook up the sub without this knowledge
for fear of damaging either the receiver or the Subwoofer. HELP?
ANYONE?

Any help would be highly appreciated...

bent23