The QSC AC-S4T-WH AcousticCoverage Series 4-Inch 2-Way 16W Loudspeaker (Pair, White) is a pair of transformer-equipped surface-mount loudspeakers designed to deliver enhanced vocal clarity and musicality. Supporting 70V, 100V, and 8-ohm operation, these speakers are suitable for paging, A/V conferencing, and background music applications.
Each speaker features a 4-inch polypropylene woofer and a 1-inch aluminum dome tweeter housed in a UV-treated ABS enclosure with a ported baffle. The 130-degree conical coverage helps provide consistent sound distribution, while the frequency range extends from 70 Hz to 20 kHz at -10 dB.
The AC-S4T supports 16W RMS power handling and delivers a maximum peak SPL of 103 dB. Its low-loss transformer includes selectable 70V and 100V taps, along with an 8-ohm bypass option.
A removable 4-pole Euroblock connector supports speaker input and loop-through wiring. An included yoke bracket simplifies surface-mount installation.
QSC AC-S4T-WH Features
- Clear Vocal Reproduction: High-quality transducers enhance clarity in the critical voice range while delivering musicality for background audio.
- Two-Way Speaker Design: A 4-inch polypropylene woofer with a butyl rubber surround works with a 1-inch aluminum dome tweeter.
- Wide Sound Coverage: The 130-degree conical coverage helps reduce the number of loudspeakers required for even sound distribution.
- Flexible Installation: A UV-treated ABS enclosure, ported baffle, transformer taps, 8-ohm bypass, removable 4-pole Euroblock connector, and included yoke bracket support a range of installation needs.

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HDTV Supply has QSC Level 1 certified expertise. Our team has completed QSC Level 1 Training, demonstrating foundational knowledge of the QSC platform, including system design, hardware and software, programming, and troubleshooting.
This training helps us provide knowledgeable product guidance when customers are selecting and deploying Q-SYS solutions. When you purchase Q-SYS products from HDTV Supply, you are working with a team that understands the Q-SYS platform and can help you make informed product and system decisions.
Why Buy the QSC AC-S4T-WH from HDTV Supply?
Choose HDTV Supply for QSC loudspeakers and professional AV solutions. Our team can help you find products that fit your installation requirements.
Contact HDTV Supply at 833-WOLFPACK for product assistance.
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QSC AC-S4T-WH Specifications
| Speaker | |
|---|---|
| Active/Passive | Passive |
| Number of Included Speakers | 2 |
| Speaker Configuration | 2-Way |
| Power Handling | 16W RMS (for 2 hours) |
| Recommended Amplifier Power | 32W |
| 70V Transformer Taps | 16W / 8W / 4W / 2W / 1W or 8-ohm bypass |
| 100V Transformer Taps | 16W / 8W / 4W / 2W or 8-ohm bypass |
| Impedance | 8 Ohms (transformer bypassed) |
| Transformer Wattage | 16W |
| Enclosure Type | Bass-Reflex |
| Drivers | |
| HF Driver | 1 × 1-inch / 2.54 cm aluminum dome tweeter |
| HF Voice Coil | 1 inch / 2.54 cm |
| LF Driver | 1 × 4-inch / 10.16 cm polypropylene woofer |
| LF Voice Coil | 1 inch / 2.54 cm |
| Performance | |
| Frequency Range | 70 Hz to 20 kHz (-10 dB) |
| Maximum SPL (Continuous) | 97 dB |
| Maximum SPL (Peak) | 103 dB |
| Sensitivity | 85 dB SPL |
| Coverage Angle | 130° conical |
| Directivity / Q Factor | 6 |
| Directivity Index | 8 dB |
| Connectivity | |
| Inputs/Outputs | 1 × removable 4-pole block speaker input/thru |
| Maximum Wire Gauge | 18 AWG |
| Physical | |
| Environmental Resistance | IP44 dust/water resistance |
| Operating Conditions | -4 to 122°F / -20 to 50°C |
| Color | Verify before publishing: supplied product title specifies White, while supplied specifications state Black. |
| Mounting | 1 bracket point on each side |
| Construction Material | ABS enclosure, metal grille |
| Dimensions | 9.1 × 6.3 × 5.9 inches / 23.11 × 16 × 14.99 cm |
| Weight | 5.3 lb / 2.4 kg per speaker |
| Packaging Information | |
| Package Weight | 12 lb |
| Box Dimensions (L × W × H) | 14 × 11 × 8 inches |
QSC AC-S4T-WH Manuals and Downloads
Note: The supplied download URLs contain “bk” (Black), while this listing title specifies “WH” (White). Confirm that these documents match the intended product variant before publishing.
QSC AC-S4T-WH Questions & Answers
QSC AC-S4T-WH Warranty
For warranty coverage, terms, and registration requirements for the QSC AC-S4T-WH AcousticCoverage loudspeakers, please confirm the applicable policy with HDTV Supply or QSC. Warranty terms have not been independently verified for this specific product in the supplied information.
For assistance, contact HDTV Supply at 833-WOLFPACK.
QSC AC-S4T-WH Customer Reviews
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