4.5" small format, low profile,
ceiling mount loudspeaker
Restaurant ∙ Retail ∙ Audio Visual ∙ Education ∙ Concourses ∙ Casinos ∙
Transportation Terminals ∙ Worship Facilities ∙ Large System Ancillary Support
AD-C4T-LP
AcousticDesign™ Series
AD-C4T-LP
Features
• Consistent tonal characteristics
across the entire AcousticDesign
family for surface, ceiling, and
pendant applications
• DMT (Directivity Matched
Transition™) waveguide ensures
smooth, uniform frequency
response over the coverage area
• Snap-fit magnetic grille
• 3x double stepped, long travel
dog-ear blind mount system
• Intrinsic Correction™ voicings
available via Q-SYS Platforms
and CXD amplifiers
• Low-saturation and low-loss
70/100V transformers with 16Ω
bypass
• Blemish-free removable logo
• Removable conduit cover plate,
also available as accessory for
pre-install wiring
• UL1480 and UL2043 certified
• Available in white (RAL 9010)
• Complete EASE, CF2, CAD, &
BIM information available online
The QSC AcousticDesign™ AD-C4T-LP is a
4.5" two-way low profile ceiling loudspeaker
ideally suited for a wide variety of
foreground and background sound
reinforcement applications which utilize
70/100V or 16Ω bypass configurations.
The AcousticDesign™ Series offers
integrators a premium quality installed
sound solution where performance,
consistent coverage, and aesthetics are
paramount. Specifically designed to
maintain a consistent tonal characteristic
across the entire family in ceiling, surface,
and pendant applications, the
AcousticDesign series allows integrators
seamless transitions within blended
installations.
The AD-C4T features a high quality 4.5"
weather treated paper cone woofer with a
1" voice coil and a .75" aluminum dome
tweeter which is positioned on a DMT
waveguide.
DMT (Directivity Matched Transition™) is
QSC’s design philosophy where the high
frequency waveguide is matched to the
natural conical behavior of the woofer at the
crossover point. The result is a coherent
transition between transducers with
improved off-axis power response for
consistent 150° conical DMT coverage.
The accurate frequency response of the
AD-C4T-LP is maintained even in 70/100V
applications by use of a low-loss, lowsaturation 30-watt transformer with
selectable taps, including 16Ω bypass,
using a rotary selector located under the
snap-fit magnetically attached powder coat
steel grille.
To retain lasting good looks, the rugged
ABS baffle is further protected by using UV
inhibitors that prevent discoloration and by
a powder coated steel back can. The
magnetic grille features a stick-on logo that
can be removed blemish-free for
installations where branding is not
permitted.
Installers will appreciate the 3x double
stepped, long travel dog-ear blind mounting
system, which captures from 0" - 2.25" of
ceiling thickness. The conduit cover plate
can be easily removed by losening the
single captive Phillips screw allowing access
to the locking 4-pole Euro-block connector
which can accept up to four 18AWG pairs,
eliminating the hassles of star topology
wiring designs.
Intrinsic Correction™ voicings that optimize
performance and speed the install process
are easily deployed via the Q-SYS
Platforms, including CXD Series amplifiers,
as part of a complete QSC systems
solution.
The AD-C4T-LP is available in QSC
standard 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.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174 please recycle
© 2017 QSC, LLC all rights reserved. QSC and the QSC logo are registered trademarks of QSC, LLC in the U.S. Patent and Trademark office and other
countries. All other trademarks are the property of their respective owners. Patents may apply or be pending.
AD-C4T-LP Spec Sheet 07/25/2017
AD-C4T-LP Details
100 1k 10k
100
90
80
70
60
50
150
120
90
60
30
0
Frequency (Hz)
Sound pressure, Level (dB)
Resistance, Amplitude (ohm)
20 50 200 500 2k 5k 20k
95
85
65
55
135
105
45
15
Frequency Response (Raw)
Frequency Response (Intrinsic Correction™)
Impedance (16 ohm bypass)
1k 10k
100
Frequency (Hz)
Beamwidth (-6dB) (deg)
200 500 2k 5k 20k
200
70
50
30
20
Impedance / Frequency Response:
Beamwidth:
Dimensions:
As part of QSC’s ongoing commitment to product development,
specifications are subject to change without notice.
Specifications
System Details AD-C4T-LP
LF transducer 114 mm [4.5 in] weather treated paper cone woofer
HF transducer 19 mm [.75 in] aluminum dome tweeter
Effective frequency range 1 70 Hz – 20 kHz
Rated noise power / voltage 2 30 watts / 22 volts (rms)
Sensitivity [dB] 3 87
Rated coverage (‐6 dB) 4 150° conical DMT
Directivity factor 4 4.5
Directivity index [dB] 4 6.5
Maximum continuous SPL [dB] 5 102
Maximum peak SPL [dB] 5 108
Nominal impedance [ohms] 16
Recommended amplifier 60 watts
Transformer taps / impedance 16Ω (in bypass setting)
3.75W (70V); 7.5W (100V) Tap: 1333Ω
7.5W (70V); 15W (100V) Tap: 667Ω
15W (70V); 30W (100V) Tap: 333Ω
30W (70V); N/A (100V) Tap: 167Ω
Input connector type Euroblock connector with parallel output
Enclosure material ABS baffle on powder coated steel back can
Grille material Powder coated steel
Ingress protection IP-34
Operating environment Designed for indoor use
Operating temperature range -20 to 50° C [-4 to 122° F]
Cutout dimension Ø 245 mm [Ø 9.65 in]
Net weight 3 kg [6.6 lb]
Product dimensions (Diameter x Height) Ø 280 x 100 mm [Ø 11.02 x 3.93 in.]
Shipping weight 10.2 kg [22.5 lb] (pair packed)
Shipping dimensions (H x W x D) 183 x 699 x 394mm [7.2 x 27.5 x 15.5 in](pair packed)
Included accessories C-ring and tile rails, rail screws, euroblock connector,
cut-out template, tether grille
Optional accessories AD-MR6 (pre-install mud ring)
Safety Agency UL1480, UL2043, NFPA90, NFPA70 suitable for use
in air handling spaces. Transformer UL registered per
UL1876, ROHS, CE compliant. Baffle meets UL94-V0
and UL94-5VB flamibility rating; in accordance with
IEC60849 / EN60849 systems.
[9.44 in]
240 mm
[11.02 in]
280 mm
[3.74 in]
95 mm
[3.93 in]
100 mm
2
-10dB from rated sensitivity
1
IEC noise, 2hrs
4
500 Hz–5 kHz average
3
Transfomer bypassed, 1W, 1m, IEC baffle,
200‐10kHz average, on‐axis
5
Calculated from rated noise voltage and sensitivity