I think is some kind of waveshaper/saturation device. It brings some simple sh!t to "roooaaaarrrrr" a lot. Here is a simple Europa patch with some sines which sounds very cheap and if it is going through this thing is rooooaaarrrrs very good in the lower area. Play this around G1. On higher notes use more "Shape". Did not tried it yet on other stuff...Have fun!
You do not have the required permissions to view the files attached to this post.