The QSC AD-C4T-ZB-WH is a 4.5-inch, 2-way zero-bezel ceiling loudspeaker designed for high-quality foreground and background sound reinforcement in commercial and architectural installations. Featuring a weather-treated 4.5-inch paper-cone woofer and 0.75-inch aluminum-dome tweeter, it delivers a 70 Hz–20 kHz frequency range with smooth, consistent 150° conical coverage through QSC’s Directivity Matched Transition™ (DMT) waveguide. Its low-loss 30W transformer supports flexible 70V/100V distributed-audio applications with selectable power taps, while a 16O bypass setting provides additional system-design flexibility. The sleek zero-bezel design, snap-fit magnetic grille, blemish-free removable logo, and three-point blind-mount system allow for a clean, discreet installation, while Q-SYS Intrinsic Correction™ voicings can optimize performance when used with compatible Q-SYS systems. Finished in white (RAL 9003), the AD-C4T-ZB-WH combines architectural aesthetics, reliable performance, and installation flexibility for offices, hospitality spaces, retail environments, corporate facilities, and other professional audio applications.