The QSC AD-S6T-BK AcousticDesign Series 6.5 Inch 2-Way 150W Surface-Mount Loudspeaker (Pair, Black) is a pair of transformer-equipped surface-mount loudspeakers designed for professional foreground and background music applications. Supporting 70V, 100V, and 8-ohm operation, these speakers provide flexible integration into commercial audio systems in restaurants, retail spaces, educational facilities, hospitality venues, and houses of worship.
Each speaker features a 6.5-inch weather-treated paper cone woofer and a 1-inch horn-loaded silk dome tweeter. QSC Directivity Matched Transition (DMT) technology provides consistent 105° conical coverage and improved off-axis response. The included X-Mount systems support flexible wall or ceiling installations in horizontal or vertical orientations. Rugged ABS enclosures and powder-coated aluminum grilles provide durable construction for suitable indoor and outdoor applications.
QSC AD-S6T-BK Features
- Two-way speaker design: Combines a 6.5-inch weather-treated paper cone woofer with a 1-inch horn-loaded silk dome tweeter for full-range audio reproduction.
- 150W RMS power handling: Designed for commercial foreground and background music systems.
- Flexible system compatibility: Supports 70V, 100V, and 8-ohm bypass operation through its built-in transformer.
- Consistent 105° coverage: QSC DMT technology helps maintain even coverage and improve off-axis response.
- Flexible installation: Includes X-Mount systems for horizontal or vertical wall and ceiling mounting.
- Durable construction: Features a rugged ABS enclosure and powder-coated aluminum grille.
- Protected connections: Uses a removable four-pole Euroblock input/thru connector beneath a sealed input cover.
- Selectable transformer taps: A rear-panel rotary tap selector is protected by a weather grommet.

QSC Certified Expertise
Knowledgeable Support for QSC Products
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.
Order the QSC AD-S6T-BK from HDTV Supply
Choose the QSC AD-S6T-BK loudspeaker pair for flexible commercial audio installations, distributed sound compatibility, and consistent sound coverage. Contact HDTV Supply for assistance with product selection and compatible audio system components.
Ask a Question About the QSC AD-S6T-BK
Need help with the QSC AD-S6T-BK loudspeaker pair, mounting options, or audio system compatibility? Contact HDTV Supply for assistance.
QSC AD-S6T-BK Specifications
| General | |
|---|---|
| Product Type | Passive surface-mount loudspeaker |
| Series | QSC AcousticDesign |
| Model | AD-S6T-BK |
| Included Speakers | 2 (pair) |
| Speaker Configuration | 2-way |
| Shielded | No |
| Power and Electrical | |
| Power Handling | 150W RMS at low impedance (specified for 2 hours) |
| Recommended Amplifier Power | 300W |
| Transformer Wattage | 60W |
| 70V Transformer Taps | 60W, 30W, 15W, 7.5W, or 8-ohm bypass |
| 100V Transformer Taps | 60W, 30W, 15W, or 8-ohm bypass |
| Impedance | 8 ohms with transformer bypassed |
| Enclosure Type | Sealed |
| Maximum Input Voltage | 35V RMS |
| Drivers | |
| High-Frequency Driver | 1 × 1-inch / 2.54 cm horn-loaded silk dome tweeter per speaker |
| HF Voice Coil | 1 inch / 2.54 cm |
| Low-Frequency Driver | 1 × 6.5-inch / 16.51 cm paper cone woofer per speaker |
| LF Voice Coil | 1.5 inches / 3.81 cm |
| Audio Performance | |
| Frequency Range | 60 Hz–20 kHz (-10 dB) |
| Maximum SPL, Continuous | 110 dB |
| Maximum SPL, Peak | 116 dB |
| Sensitivity | 89 dB SPL |
| Coverage Angle | 105° conical |
| Directivity Factor (Q) | 5 |
| Directivity Index | 7 dB |
| Connectivity and Installation | |
| Connector | 1 removable four-pole Euroblock speaker input/thru connector per speaker |
| Included Mounting System | QSC X-Mount systems |
| Mounting Points | 1 rear bracket point per speaker |
| Physical and Environmental | |
| Color | Black |
| Construction Material | ABS enclosure, aluminum grille, polymer components |
| Operating Temperature | -4°F to 122°F / -20°C to 50°C |
| Dimensions (H × W × D) | 14.4 × 8.5 × 8.5 inches / 36.58 × 21.59 × 21.59 cm |
| Weight per Speaker | 13.6 lb / 6.2 kg |
| Packaging | |
| Package Weight | 33 lb |
| Box Dimensions (L × W × H) | 20 × 12 × 12 inches |
QSC AD-S6T-BK Frequently Asked Questions (Q/A)
Q1: What is the QSC AD-S6T-BK?
The QSC AD-S6T-BK is a pair of black, two-way, 6.5-inch AcousticDesign surface-mount loudspeakers designed for commercial foreground and background music applications.
Q2: How many speakers are included?
This package includes two loudspeakers and is sold as a pair.
Q3: How much power can each AD-S6T-BK handle?
The supplied specifications list 150W RMS power handling at low impedance under the stated two-hour condition. The recommended amplifier power is 300W.
Q4: Does the AD-S6T-BK support 70V and 100V systems?
Yes. The built-in transformer supports 70V and 100V distributed audio systems. The speakers can also operate in 8-ohm bypass mode.
Q5: What transformer tap settings are available?
The listed 70V taps are 60W, 30W, 15W, and 7.5W, plus 8-ohm bypass. The 100V taps are 60W, 30W, and 15W, plus 8-ohm bypass.
Q6: What is the frequency range of the AD-S6T-BK?
The specified frequency range is 60 Hz to 20 kHz at -10 dB.
Q7: What is the coverage angle of these speakers?
The AD-S6T-BK provides 105° conical coverage. QSC Directivity Matched Transition technology helps provide consistent coverage and improved off-axis response.
Q8: Can the QSC AD-S6T-BK be used outdoors?
The supplied product description states that the enclosure provides dust and splash resistance beyond IP54 ratings. Confirm the installation environment and exposure conditions before using the speakers outdoors.
Q9: How are the AD-S6T-BK speakers mounted?
The pair includes X-Mount systems that support horizontal or vertical wall and ceiling installation at a variety of angles.
Q10: What connector does the AD-S6T-BK use?
Each speaker uses a removable four-pole Euroblock input/thru connector beneath a sealed input cover.
Q11: What applications are suitable for the QSC AD-S6T-BK loudspeaker pair?
These speakers are designed for commercial audio installations such as restaurants, retail stores, educational facilities, hospitality venues, transportation terminals, casinos, concourses, and worship facilities.
Q12: Can the AD-S6T-BK work with an 8-ohm amplifier?
Yes. The transformer can be bypassed for 8-ohm operation. Ensure the amplifier and speaker configuration are compatible before connecting the system.
Q13: What amplifier power is recommended for the QSC AD-S6T-BK?
The supplied specifications recommend 300W amplifier power. Select an amplifier that matches the selected impedance or distributed-audio configuration and follow QSC's installation guidance.
Q14: What are the dimensions and weight of each speaker?
Each speaker measures 14.4 × 8.5 × 8.5 inches (36.58 × 21.59 × 21.59 cm) and weighs 13.6 lb (6.2 kg).
Q15: Where can I find the AD-S6T-BK manual and datasheet?
The user manual and datasheet are linked in the Manuals tab. Contact HDTV Supply customer service for additional product information or system compatibility assistance.
QSC AD-S6T-BK Warranty
Please contact HDTV Supply or QSC to confirm the applicable warranty coverage for the AD-S6T-BK loudspeaker pair and the terms associated with your purchase.
QSC AD-S6T-BK Customer Reviews
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QSC AD-S6T-BK Product Videos
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QSC AD-S6T-BK AcousticDesign Series 6.5 Inch 2-Way 150W Surface-Mount Loudspeaker (Pair, Black)
Learn more or order now: https://www.hdtvsupply.com/qsc-ad-s6t...
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QSC AD-S6T-BK AcousticDesign Series 6.5 Inch 2-Way 150W Surface-Mount Loudspeaker (Pair, Black)
Visit: https://www.hdtvsupply.com/qsc-ad-s6t-bk-acousticdesign...