QSC AD-S4T User Manual

AcousticDesign™ Series
AD-S4T

Small format, surface
mount loudspeaker

AD-S4T

X-Mount™ (included)

Features

• DMT™ (Directivity Matched
Transition) ensures smooth,
uniform frequency response over
the coverage area

• X-Mount™ system enables the
loudspeaker to be easily installed
and deployed at a variety of angles
with no slippage over time

• Advanced voicing filter sets using
QSC Intrinsic Correction™, available
through either Q-Sys processing or
CXD amplifier platforms

• Low-saturation and low-loss
70/100V transformers with 8Ω
bypass

• Lightweight ABS enclosures offer
long-term durability and lasting
good looks

• Sealed input panel cover and
powder coated aluminum grilles
for added weather resistance

• Meets IEC60529 IP-54 for dust
and splash resistance

• Available in black (RAL 9011) or
white (RAL 9010)

• Complete EASE, CF2, CAD, & BIM
information available online

Restaurant ∙ Retail ∙ Audio Visual ∙ Education ∙ Concourses ∙ Casinos ∙ Transportation
Terminals ∙ Worship Facilities ∙ Large System Ancillary Support

The QSC AcousticDesign™ AD-S4T is a
surface mounted 70/100V, 4” two-way
loudspeaker system, ideally suited for a
wide variety of foreground and background
sound reinforcement applications.

AcousticDesign™ series offers integrators a
premium quality installed sound solution
where performance, coverage, and
aesthetics are paramount. Combined with
unprecedented ease-of-installation and high
weather resistance, the AcousticDesign™
series provides integrators a versatile and
confident install solution.

The AD-S4T features a high quality 100 mm
[4 in] weather treated paper cone woofer
on a 25 mm [1 in] voice coil. A carefully
selected 19 mm [.75 in] silk dome tweeter
with a 19 mm [.75 in] voice coil perfectly
matches the sensitivity and performance of
the woofer for outstanding full-range
reproduction.

Consistent and even 120° axisymmetric
(conical) coverage is achieved through
DMT™ (Directivity Matched Transition), a
QSC innovation which 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.

The even, accurate frequency response of
the AD-S4T is maintained even in 70/100V
applications by use of a low-loss, low­saturation 30-watt transformer with
selectable taps, including an 8Ω bypass. To
preserve weather resistance, the rotary
selector is located on the back of the
enclosure, protected by a weather grommet.

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.

Installers will appreciate the award-winning
X-Mount™ system included with each full­range 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
preconfiguration 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.

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

The AcousticDesign™ series feature a stylish
appearance free of obtrusive logo
adornments for aesthetically sensitive
installations. AcousticDesign™ surface
loudspeakers are available in QSC standard
black (RAL 9011) or white (RAL 9010) and
may be painted to match any decor.

For your system integration needs, complete
EASE, CF2, CAD, and BIM files are available
for download at QSC.com.

AD-S4T Details

10 0 1k 10 k

10 0

90

80

70

60

50

80

64

48

32

16

0

Fre quen cy (Hz)

Sound Pressure, Level (dB)

Impedance, Amplit ude (ohm)

20 50 20 0 50 0 2k 5 k 2 0k

95

85

65

55

72

56

24

8

Frequency Response (Raw)

F

requency Response (Intrinsic Correction™)

Impedance (8 Ohm Bypass)

0

-2

-4

-6

-8

-10

-12

1k 10k

90

60

30

0

-30

-60

-90

Sound Pr essure , Leve l (dB)

Frequency (Hz)

Axial Angle (deg )

500 2k 5k 20k

161 mm [6.34 in]

163 mm [6.42 in]

161 mm [6.34 in]

163 mm [6.42 in]

163 mm [6.42 in]

261 mm [10.27 in]

Impedance / Frequence Response:Horizontal Contour:

Dimensions: Specifications:

System Details

Effective frequency range
Rated noise power / voltage
Broad-band sensitivity
Coverage angle (-6 dB) 120°
Directivity factor (Q) 6
Directivity Index 8 dB
Maximum continuous SPL
Maximum peak SPL
Rated impedance 8 ohms
Recommended amplifier 100 watts
Transformer taps 70 V: 30, 15, 7.5, 3.75 watts and 8 ohm bypass

HF transducer 19 mm [.75 in] silk dome tweeter

LF transducer 100 mm [4 in] weather treated paper cone woofer, 25

Input connector type Euroblock connector with parallel output
Enclosure material Painted ABS polymer
Grille material Powder coated aluminum
X-Mount material Powder coated aluminum

Enclosure Details

Ingress protection IP-54
Operating environment Designed for indoor and outdoor use
Testing The AD Series loudspeakers qualified for outdoor

161 mm [6.34 in]

261 mm [10.27 in]

261 mm [10.27 in]

163 mm [6.42 in]

163 mm [6.42 in]

1

3

4

4

AD-S4T

68 Hz – 20 kHz

2

50 watts / 20 volts (rms)
87 dB SPL

104 dB
110 d B

100V: 30, 15, 7.5 watts and 8 ohm bypass

19 mm [.75 in] voice-coil horn loaded

mm [1 in] voice-coil

use using the following tests:

Salt fog: MIL-STD-810G Me thod 509.5 for 100 hrs.

Humidity: MIL-STD-810G Method 507.5, Natural
cycle B2, cyclic high RH for 7 days

High and low temperature: tested to QSC internal
standards between -20° and 50° C

161 mm [6.34 in]

As part of QSC’s ongoing commitment to product development, specifications are subject to
change without notice.

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: [phone]

© 2014 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and

Operating Temperature Range -20 to 50° C [-4 to 122° F]
Net weight 2.9 kg [6.5 lb]
Product dimensions 261 x 161 x 163 mm [10.27 x 6.34 x 6.42 in]
Shipping weight 7.65 kg [16.8 lb] (pair packed)
Shipping dimensions 394 x 261 x 458 mm [15.5 x 10.3 x 18 in] (pair packed)
Included accessories X-Mount mounting system, euroblock connector,

1

Free-field, -10 dB from on-axis sensitivity

2

IEC60268-1 noise signal for 2 hours

3

On-Axis, free-field sensitivity, 2.83V, 1 m

4

Calculated from rated noise voltage and sensitivity

Trademark office and other countries. DMT, Intrinsic Correction, and X-Mount are trademarks of QSC.

AD-S4T Spec Sheet 03/12/2015

input panel cover

please recycle