Sold: Niles and Adcom Speaker Selectors in Garage Sale Posted November 25, 2017 The Niles does not except low gu wire. I do own a gfs-6 and can get 12gu into the twist lock ports plus it has a protection circuit for use of multiple sets of speakers . something else the Niles is lacking. Sorry to say $50 is high for the Adcom . They go for $30 all day long.