Sound Wave Diffraction Distortion Elimination Technology Developed Exclusively By Hansen Audio. The Knight 2 Is Designed Sonically And Visually, To Last, And Be Enjoyed For Many Generations To Come.All Hansen Audio Loudspeakers Are Meticulously Hand-Built In Canada. Superb Hansen The Knight Speakers.Serial 90Xxx.These Were Purchased In 2008.They Are In Mint Unmarked Condition,Used In A Secondary System.Supplied With Factory Crate