QSC AD-C4T-LP User Manual

AcousticDesign™ Series
AD-C4T-LP

4.5" small format, low profile,
ceiling mount loudspeaker

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

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

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. A locking 4-pole
Euro-block connector that can accept four
18AWG pairs eliminates the termination
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.

AD-C4T-LP Details

10 0 1k 10 k

10 0

90

80

70

60

50

15 0

12 0

90

60

30

0

Fre quency (Hz)

Sound pressur e, Level (dB)

Resistance, Ampli tude (ohm)

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

95

85

65

55

13 5

10 5

45

15

Frequency Response (Raw)

Frequency Response (Intrinsic Correction™)

Impedance (16 ohm bypass)

1k 10 k

10 0

Fre que nc y (H z)

Beamwidth (-6dB) (deg)

20 0 50 0 2 k 5k 20 k

20 0

70

50

30

20

Impedance / Frequency Response:

Beamwidth:

Dimensions:

95 mm

100 mm

[3.74 in]

[3.93 in]

240 mm

[9.44 in]

280 mm

[11.02 in]

Specications

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

Rated noise power / voltage

Sensitivity [dB]

Rated coverage (‐6 dB)

Directivity factor 4 4.5

Directivity index [dB]

Maximum continuous SPL [dB]

Maximum peak SPL [dB]

Nominal impedance [ohms] 16

Recommended amplier 60 watts

Transformer taps / impedance 16Ω (in bypass setting)

Input connector type Euroblock connector with parallel output

Enclosure material ABS bafe 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,

Optional accessories AD-MR6 (pre-install mud ring)

Safety Agency UL1480, UL2043, NFPA90, NFPA70 suitable for use

1

2

3

4

4

5

5

70 Hz – 20 kHz

30 watts / 22 volts (rms)

87

150° conical DMT

6.5

102

108

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

cut-out template, tether grille

in air handling spaces. Transformer UL registered per
UL1876, ROHS, CE compliant. Bafe meets UL94-V0
and UL94-5VB amibility rating; in accordance with
IEC60849 / EN60849 systems.

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]

© 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

2

-10dB from rated sensitivity

1

IEC noise, 2hrs

4

500 Hz–5 kHz average

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

3

Transfomer bypassed, 1W, 1m, IEC bafe,

200‐10kHz average, on‐axis

5

Calculated from rated noise voltage and sensitivity

please recycle