ISE 2014: Funktion-One Shows Its F81 Compact Loudspeaker in Multiple Colors February 10, 2014 | Home / February 10, 2014 rave-video / ISE 2014: Funktion-One Shows Its F81 Compact Loudspeaker in Multiple Colors ISE 2014: Funktion-One Shows Its F81 Compact Loudspeaker in Multiple Colors