1in.(2.54cm) Titanium diaphragm compression driver mated to pivoting 90° x 90° square Tractrix Horn Dual 5.25 in. Cerametallic cone woofers Perfect for left, center or right channel use Easily mounts horizontally or vertically. Horn-loaded technology increases acoustic output while significantly reducing distortion. Treble and midbass attenuation switches and IR receiver knock out. Elegant new, low-profile SlimTrim magnetic grille