“InVincible, YG Acoustics’ subsonic woofer, incorporates the world’s largest CNC machined driver cone. The cone begins life as a 66 lb/30 kg billet of aircraft grade aluminum. After many hours and numerous machining steps, the resulting cone weighs an astonishing 14.5 oz/411 gms. Almost 99% of the billet is machined away to produce the finished cone. Pictured here are InVincible billets before and after the very first stage of five axis CNC machining. Included for comparison is a Sonja model woofer billet.”
