Electrovoice 668 Posted on 20130113 by Anthony P. Kuzub I had this show up… I’ve never seen one then I found this in its boot. I wonder how similar it is to an RE20 design. Looking for manual now. http://www.coutant.org/ev668/index.html http://www.coutant.org/ev668/index.html http://www.coutant.org/ev668/index.html