From the manufacturer: The RF-15 offers tremendous value and versatility in a high-performance floorstanding loudspeaker. Slender and compact, it still has the efficiency, power handling, and bass extension to deliver a potent sonic wallop. The RF-15 works equally well standing alone in a stereo music system or fronting a sophisticated home theater. And because it is perfectly matched cosmetically and sonically to the other Klipsch Reference Series loudspeakers, it allows terrific flexibility in system configuration. The RF-15 uses a 1-inch titanium-dome compression driver tweeter for the high frequencies, loaded by a 5-inch square 90° x 60° Tractrix® Horn molded into the front of the enclosure. The horn raises the driver’s efficiency and controls its radiation pattern to minimize detail-blurring reflections from walls, floor, and ceiling. Dual 5.25-inch CerametallicTM cone woofers with rigid, low- resonance cast-polymer frames generate dynamic, room-filling bass. All drivers are magnetically shielded to prevent interference with direct-view television sets. Amplifier connections are via two pairs of binding posts, which are strapped together for normal wiring. Removing the straps allows the speaker to be bi-wired. Magnetic posts hold the RF-15’s low-diffraction grille securely in place, and the outrigger feet can be fitted with adjustable-height rubber pads or spikes. Black Ash finish.