HI-RES AUDIO CERTIFIED WITH HIGH-END COMPONENTS FOR STUDIO-QUALITY SOUND - High resolution certified audio produced by loaded ribbon tweeters for crisp, natural-sounding highs. DESIGNED BY PHIL JONES - Aesthetics and technical aspects designed by famed audio engineer, Phil Jones, to create a truly professional grade sound BUILT-IN AMP WITH SUBWOOFER OUT & A WIDE ARRAY OF INPUTS - Connect an optional subwoofer quickly and easily. Optical, Coaxial, Bluetooth 4.1 aptX, RCA, AUX, and USB Inputs TRULY POWERFUL DISTORTIONLESS BASS - Courtesy of a 5' cast frame, under-hung coil woofer with a hard anodized aluminum cone for incredibly powerful bass that doesn't distort at higher volumes 2 YEAR WARRANTY - Guaranteed high quality and reliability with hassle-free parts and labor warranty for two years in USA and Canada.