To build on Mr P's post...
Looking at a spec sheet on the Yammie site, while the the receiver does not appear to have a tape monitor (I miss those things), it DOES appear to have a pre out/main capabilities. I would suggest connecting the Oral Exciter (I DO love that name) between these two. This way, anyhing going to your main speakers will go through it.
As for that big-ass bass thingie, I have no idea what it does. If it's a line level device I guess it would be inserted between the LFE/sub output and the powered subwoofer. Don't be surprised if it overtaxes the subwoofer amp, though.
If you're NOT going to be using a subwoofer and decide to conenct in series with the exciter by utilizing it's out/in loops, remember that whichever comes second will be operating with the output of the previous device. It sounds like the output of the exciter may be going through the big-ass bass thingie, or vice versa. Who knows? You've got the manuals, not us.
Owing to the cumulitive effect of this signal manipulation, it may or may not sound good. Your guess is as good as mine.