AcousticDesign Surface Mount

AcousticDesign™ surface loudspeakers offer a variety of models specifically tailored for demands of higher fidelity applications.  Designed for clarity and presence, these loudspeaker systems deliver pristine audio reproduction for installations requiring a refined audio experience.  Models ship complete with the award winning X-Mount™ system and weather input cover.

Consistent and even axisymmetric coverage is achieved through Directivity Matched Transition (DMT™), a QSC innovation that matches the directivity patterns of the woofer and the high-frequency waveguide at the crossover point. The result is a coherent transition between transducers and improved off-axis response.

AcousticDesign models with (T) suffix feature low-loss, low-saturation transformers with selectable taps, including an 8Ω bypass. To enhance weather resistance, the rotary selector is located on the back of the enclosure, protected by a weather grommet.

To further enhance performance and speed of install with optimum result, advanced voicing filter sets using QSC Intrinsic Correction™ techniques are available using Q-SYS networked audio processing platforms, including DPA-Q amplifiers, for a complete QSC systems solution.

Installers will appreciate the award-winning X-Mount™ system included with each full-range AcousticDesign model. This ingenious mounting solution achieves unprecedented ease-of-installation in horizontal, vertical, wall, or ceiling deployments. 

Knurled surfaces at the pivot planes ensure the load will not drift or sag over time.  Articulation marks allow pre-configuration of the X-Mount™ while on the ground with no special tools required. Once secure, the loudspeaker installs in seconds, allowing the installer to work safer, smarter, and faster with repeatable results.

Furthermore, AcousticDesign surface-mount speakers may be adapted to third-party mounting solutions or used with the following QSC ball-mount and yoke mount accessories:

                 • AD-S32T: Yoke and ball mount included
                 • AD-S52/S52T: YM-5 Yoke Mount available
                 • AD-S6T/AD-S8T/AD-S10T/AD-S12: X-Mount™
                   included, Yoke Mounts available

With rugged ABS enclosures, sealed input panel covers, and powder-coated aluminum grilles for weather resistance, the AcousticDesign surface mounted series exceed IEC60529 IP-54 ratings for dust and splash resistance.

Designed for all general audio applications, AcousticDesign surface-mount models come in a wide range of sizes, from a compact 3-inch 2-way to a dual 8-inch 2-way and even a dual 8-inch subwoofer. Several models have built-in 70/100 volt distributed line transformers.

Complementing adjacent product families, AcousticDesign surface loudspeakers are available in QSC standard black (RAL 9011) or white (RAL 9010), and may be painted to match any decor.


Effective frequency range1 68 Hz to 20 kHz 60 – 20k Hz 55 – 20k Hz 50 – 19k Hz 52 – 20k Hz
Rated noise
power / voltage2
50W / 20V (rms) 150W / 35V (rms) 200W / 40V (rms) 250W / 45V (rms) 300W / 50V (rms)
Sensitivity3 87 dB SPL 89 dB SPL 90 dB SPL 92 dB SPL 95 dB SPL
Coverage Angle
(-6 dB)
120° conical 105° conical 105° conical 90° conical 75° conical
(Peak SPL @ 1M)
110 dB 116 dB 119 dB 122 dB 126 dB

Driver Information:



4" weather resistant paper cone woofer, 1" / 25 mm voice-coil

0.75" silk dome tweeter / 0.75” voice coil, horn loaded
6" weather resistant paper cone woofer, 1.5" / 38 mm voice-coil

1" silk dome tweeter  / 1” voice coil, horn loaded
8" weather resistant paper cone woofer, 2"/ 51 mm voice-coil

1" exit / 1.4" voice-coil compression driver 
10" weather resistant paper cone woofer, 2.5"/ 64 mm voice-coil

1" exit / 1.4" voice-coil compression driver 
12" weather resistant paper cone woofer, 3"/ 76 mm voice-coil

1" exit / 1.4" voice-coil compression driver 
Rated Impedance
Input Connectors Euroblock connector with parallel
output terminals
Euroblock connector with parallel
output terminals
Euroblock connector with parallel
output terminals
Euroblock connector with parallel
output terminals
Euroblock connector with parallel
output terminals
Enclosure Painted ABS polymer Painted ABS polymer Painted ABS polymer Painted ABS polymer Painted ABS polymer
Ingress protection IP-54 IP-54 IP-54 IP-54 IP-54
Net Weight 6.5 lb / 2.9 kg 13.6 lb / 6.2 kg 24.1 lb / 11 kg 31 lb / 15 kg 35 lb / 16 kg
  Details Details Details Details Details
1 Free-field, -10 dB from on-axis sensitivity.
2 IEC60268-1 noise signal for 2 Hrs.
3 On-Axis, free-field sensitivity, 2.83V, 1 m.
4 Calculated from rated noise voltage and sensitivity

Specifications are subject to change without notice.

Legacy Models

Frequency Range, -10 dB 65 Hz - 20 kHz
Nominal Coverage 100° H x 100° V
Power Capacity1 30 W (100 hrs)
Sensitivity2 85 dB
LF Driver Information 3" weather resistant,
polypropylene cone woofer
HF Driver Information 0.75" neodymium tweeter
Controls / Selectors 70 V: 30, 15, 7.5, 3.8 W
100 V: 30, 15, 7.5 W
8Ω Selectable Rotary Knob
Connectors Screw terminals
Dimensions (HWD) inches 7.9 x 4.8 x 5.5
Dimensions (HWD) mm 202 x 123 x 140
Weight 4 lb / 1.8 kg

1 Continuous IEC specified test signal, 2 hours unless otherwise stated.
2 Based on nominal impedance, measured in full space. 1 W @ 1 m.

All specifications are subject to change without notice.


System Type 12" Subwoofer
Low-frequency Transducer 12" woofer, 2.5" voice coil
Frequency Response (-6 dB)1 30 Hz - 135 Hz
Filter N/A
Max Continuous Output2:
half space / full space 
121 dB SPL / 115 dB SPL
Nominal Impedance
Rated Noise Power 300 W (2 hours AES2 - 1984)
Sensitivity 90 dB
Transformer Type N/A
Transformer Taps N/A
Environmental N/A
Connectors Euroblock
Dimensions (HWD) inches 23.5 x 13.9 x 12.7
Dimensions (HWD) mm 596 x 354 x 323
Weight 29 lb / 13.2 kg
  AD-S112sw Details

1 Measured free field.
2 Pink noise within specified frequency range at 1m at rated RMS power.