QSC AC-S4T-BK 4.5″ Two-Way Surface Speaker with 70/100V Transformer, 8Ω Bypass, 130° Coverage, Yoke Mount, Black (AC-S4T-BK)

QSC AC‑S4T‑BK Black Surface‑Mount Loudspeaker

Product Description

The QSC AC‑S4T‑BK is a compact surface‑mount full‑range loudspeaker designed for commercial audio installations where ceiling mounting isn’t feasible or desired. With a sleek all‑black finish, it delivers clear voice and music playback in offices, restaurants, retail spaces, and other environments that require distributed audio with a low visual profile.

Key Features

Audio Performance

• 4″ Full‑Range Driver: Offers balanced sound with clear midrange and intelligible speech.

• Wide Frequency Response: Designed to cover essential audio frequencies for paging and background music.

• Flexible Placement: Surface‑mount design allows installation on walls, columns, or other surfaces.

Installation & Connectivity

• Surface‑Mount Enclosure: Built‑in bracket and hardware simplify installation on flat surfaces.

• 70 V/100 V Transformer Compatible: Includes a selectable high‑impedance transformer for distributed audio systems with multiple speakers.

• 8 Ω Bypass Option: Provides low‑impedance connection for use with conventional amplifiers.

Build & Aesthetics

• Durable Construction: Robust enclosure suitable for commercial indoor environments.

• Black Finish: UV‑inhibited black enclosure blends with darker décor and hides visual impact.

• Compact Design: Low‑profile cabinet that integrates discreetly in installed spaces.