i want to connect a pioneer SA9100 to a pioneer SA1000. they both have pre-out and main-in. the 9100 has a switch for seperated or connected and then subsonic on and off. the 1000 has intercoupled or seperated. any idea on settings or sugestions on what to try?

my goal is to use the 1000 as a pre-amp and also be able to use the inputs.