emusonacid! legacy

Hi,
I just had a closer look at the rfx-32, which I didn't use that much
until now.
Is it only possible to route signals to the Subout 1, 2, 3...through
a specific Bus...and have only ONE bus to ONE Sub??!

For example I'd like to route a voice to Sub1, perhaps a cabasa from
another voice into Sub3, no Fx on them, but a little reverb
on one clap from the other voice. It doesn't seem possible, is it?

Am I so stupid I didn't understand anything or is the routing that
stupid and unflexible?

thanx 4 your explications
lio