he QSC AD-C4T-LPZB is a premium 4.5-inch two-way low-profile, zero-bezel ceiling loudspeaker designed to deliver clear, consistent audio while maintaining a sleek, modern architectural appearance. It features a weather-resistant 4.5-inch paper-cone woofer and 0.75-inch aluminum dome tweeter integrated with QSC’s Directivity Matched Transition™ (DMT) waveguide for smooth frequency response and wide, uniform 150° conical coverage. With a 70 Hz–20 kHz frequency range, 30W rated power, 102 dB maximum continuous SPL, and selectable 70V/100V transformer taps with 16O bypass, the AD-C4T-LPZB provides flexible integration for foreground and background audio applications. Its snap-fit magnetic grille, blind-mount system, removable logo, and low-profile 3.93-inch depth simplify installation while the zero-bezel design blends discreetly into contemporary ceilings. The speaker also supports Q-SYS Advanced Intrinsic Correction™ voicings and includes a Euroblock connector with parallel output, making it well suited for commercial spaces, retail environments, hospitality venues, education facilities, corporate AV systems, worship spaces, and other professionally installed audio applications.