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AD-S4T
AcousticDesign™ Series
AD-S4T
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
Series 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
The QSC AcousticDesign™ AD-S4T is a
surface mounted 70/100V, 4.5" 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,
low-saturation 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
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
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
the Q-SYS Platform including CXD Series
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.
X-Mount™ (included)
4.5" small format, surface
mount loudspeaker
AD-S4T Details
100 1k 10k
100
90
80
70
60
50
80
64
48
32
16
0
Frequency (Hz)
Sound Pressure, Level (dB)
Impedance, Amplitude (ohm)
20 50 200 500 2k 5k 20k
95
85
65
55
72
56
24
8
Frequency Response (Raw)
Frequency Response (Intrinsic Correction™)
Impedance (8 Ohm Bypass)
0
-2
-4
-6
-8
-10
-12
1k 10k
90
60
30
0
-30
-60
-90
Sound Pressure, Level (dB)
Frequency (Hz)
Axial Angle (deg)
500 2k 5k 20k
Horizontal Contour: Impedance / Frequence Response:
System Details AD-S4T
HF transducer 19 mm [.75 in] silk dome tweeter
19 mm [.75 in] voice-coil horn loaded
LF transducer 100 mm [4.5 in] weather treated paper cone woofer,
25 mm [1 in] voice-coil
Effective frequency range1 68 Hz – 20 kHz
Rated noise power / voltage2 50 watts / 20 volts (rms)
Broad-band sensitivity3 87 dB SPL
Coverage angle (-6 dB) 120°
Directivity factor (Q) 6
Directivity Index 8 dB
Maximum continuous SPL4 104 dB
Maximum peak SPL4 110 dB
Rated impedance 8 ohms
Recommended amplifier 100 watts
Transformer taps 70 V: 30, 15, 7.5, 3.75 watts and 8 ohm bypass
100V: 30, 15, 7.5 watts and 8 ohm bypass
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
use using the following tests:
Salt fog: MIL-STD-810G Method 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
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,
input panel cover
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
Dimensions: Specifi cations:
161 mm [6.34 in]
163 mm [6.42 in]
163 mm [6.42 in]
261 mm [10.27 in]
161 mm [6.34 in]
261 mm [10.27 in]
161 mm [6.34 in]
163 mm [6.42 in]
163 mm [6.42 in]
261 mm [10.27 in]
161 mm [6.34 in]
261 mm [10.27 in]
161 mm [6.34 in]
163 mm [6.42 in]
163 mm [6.42 in]
261 mm [10.27 in]
161 mm [6.34 in]
261 mm [10.27 in]
As part of QSC’s ongoing commitment to product development,
specifications are subject to change without notice.
AD-S4T Spec Sheet 07/25/2017
please recycle
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
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