Qsc Llc AC-S4T-BK Two-way Surface Speaker 70V 100V

Product Description

The QSC LLC AC-S4T-BK is a two-way surface-mount loudspeaker designed for 70-volt and 100-volt distributed audio systems. Built around a 4.5-inch driver configuration, it delivers intelligible speech and background music reproduction in commercial and light-institutional settings. The AC-S4T-BK ships as a single unit and is intended for permanent installation by qualified AV integrators or low-voltage systems technicians. Its surface-mount form factor suits ceiling-level or wall-mounted placement in areas where recessed installation is not practical.

This speaker is suited for distributed audio applications in commercial environments such as retail spaces, restaurants, offices, and hospitality venues. The 70-volt and 100-volt transformer compatibility makes it a standard fit for large-scale paging and background music systems where multiple speakers are wired on a single amplifier circuit. Installation in these systems typically involves setting the transformer tap to match the amplifier output and total system wattage budget.

Key Features

• Two-way driver design for extended frequency coverage across speech and music content
• Compatible with both 70-volt and 100-volt distributed audio systems
• 4.5-inch driver for compact surface-mount deployment
• Surface-mount enclosure allows flexible placement on walls or ceilings
• Single-unit packaging for straightforward quantity ordering on larger installs

Compatibility

Designed as an OEM-style surface-mount loudspeaker for 70-volt and 100-volt distributed audio amplifier systems in commercial installations.

Installation Notes

Installation should be performed by a qualified low-voltage systems technician familiar with distributed audio wiring practices. Disconnect and de-energize the amplifier before making speaker connections. Set the onboard transformer tap to the correct wattage value before finalizing the wiring to avoid overloading the amplifier circuit. Local building and electrical codes may apply to low-voltage wiring runs in commercial occupancies.