Klipsch Reference Premiere RP-440C Center Channel Speaker - Ebony The Reference Premiere RP-440 center Channel speaker provides clarity and accuracy to your home theater system with a stylish brushed baffle and four cerametallic copper woofers 1-Inch linear travel Suspension titanium tweeter. Quad 4-Inch Spun Copper Cerametallic Cone Woofers 90x90 Hybrid Tractrix Horn, All New Tractrix Port, Strong, Flexible Removable Grille. MDF Cabinet with Brushed Polymer Veneer Baffle Finish. All New Tractrix Port