I picked up an interested piece this past weekend at the local Goodwill. A bunch of stuff came rolling out from the back and I recognized a brand among the stacked audio gear.
Wasn't sure what it's for but at $12, I was taking it home to find out.
It's a dbx 400x source routing switch. It was the only high end piece on the cart. Usually you don't connect dbx components to mid-fi gear. I should return to take another recon.

It's actually sitting atop a Kenwood active 12" sub I also picked up there for $15. It's not C&V gear though. Not sure where to use them yet. They would get ruined in an AZ garage so no custom man cave sound system for me.