In-Ceiling Speaker
CM42-EZs
Technical Information for System Engineers
Key Features
• Engineered for applications with
limited plenum space incorporating a
SoundTube-specific shallow backcan
with an installed depth of only 3.5
inches.
• One 102 mm (4 in) treated fiber woofer
with cloth surround and one 19 mm (0.75
in) silk tweeter.
Specifications: CM42-EZs
Tile bridge included
• Reduced amplification costs with
maximum efficiency including 87.5 dB
sensitivity and16 Ohm impedance.
System Type
4" Coax, in-ceiling, sealed (20 Watt transformer for
25/70.7/100 Volt or 16 Ohm direct)
Impedance (nominal)
16 Ohm
84.5 dB
87.5 dB
160 Hz - 20 kHz
125 Hz - 22 kHz
40 w
20 w
100.5 dB
20 w
Sensitivity dB @ 2.83V/1M
Sensitivity dB @ 1W/1M 1
Frequency Response (- 3 dB) 2
Frequency Response (-10 dB) 2
Max. Program Power 3
Max. Continuous Power RMS 4
Max. Power SPL @ 1 M 5
Max. SPL @ 3 dB Distortion 6
Coverage Angle (-6 dB @ 2 kHz)
Coverage Angle (-6 dB @ 10 kHz) 95º
Coverage Angle
Directivity Factor (Q)
Directivity Index (DI) dB
Tap Selector
• Superior voice intelligibility with an
average coverage angle of 100° (Indepen-
dently verified, 2 – 10 kHz).
• Easy-access 5-position tap switch for
25/70.7/100 Volt and 16 Ohm settings
allows for easy ordering, stocking and
installation.
170º
• Incorporates a painted steel grille for
lasting durability.
100º (Avg. from 2 - 10 kHz)
• UL 1480 & 2043, cUL, CE (EMC Direc-
tive 89/366/EEC, EN55020, EN55013)
approved.
4.3 (Avg. 100 Hz - 10 kHz) ; 4.2 (2 kHZ)
5.7 dB (Avg. 100 Hz - 10 kHz) ; 6.2 dB (2 kHz)
5-Position rotary switch with 16 ohm direct
Transducer - Low Frequency Driver 102 mm (4 in) Treated fiber cone, cloth surround
Transducer - High Frequency Driver 19 mm (0.75 in) Silk tweeter
• Adaptable to material thicknesses
ranging from 0.00 in (0.0 mm) to 1.50 in
(22.9 mm).
Low Frequency Voice Coil
Crossover Frequency
Network Type: Low Pass
Network Type: High Pass
Enclosure Alignment
Enclosure Material
Grille
12.70 mm / 0.50 in
5.0 kHz
12dB per octave, 2nd order
6 dB per octave, 1st order
Sealed
• Included accessories: Tile bridge, UL
listed 0.5” flex conduit clamp, paint
shield & 2 wire nuts.
Drawn steel backcan with ABS baffle
Painted Steel
• Optional accessories: Color-coded
(orange) pre-construction bracket
(AC-CM4-PCB), junction box (AC-CM-EZ-
JBOX).
Inputs
Colors
18-Gauge hard wired leads
Black or white
Backcan Diameter
Backcan Height
Visible Diameter
Visible Height
5.78 in / 146.8 mm
3.75 in / 95.3 mm
7.50 in / 190.5 mm
0.33 in / 8.4 mm
• High-quality black or white painted
finish. Custom colors available.
Description
Mounting Hole Diameter
Min / Max Ceiling Thickness
Weight
6.50 in / 165.1 mm
0.00 in / 0.0 mm – 1.5 in / 38.1 mm
4.0 lb / 1.8 kg
The CM42-EZs is a 4” coaxial 2-way
blind-mount in-ceiling speaker which
delivers true high efficiency and perfor-
mance across the operating bandwidth.
By incorporating a 4" treated-fiber driver
with cloth surround in a sealed drawn
steel backcan, this speaker delivers maxi-
mum frequency response (125 Hz – 22
kHz, - 10 dB) in a compact design.
Mounting hardware is included and
features a constant-tension mounting
system with a 21 gauge “full-metal” steel
tile bridge ensuring rapid and secure
installation in any sheetrock or drop-tile
application. For easy ordering, stocking
and installation, this series includes a
color-coded (green) tile bridge, optional
pre-construction bracket, and a 5-posi-
tion tap switch for 25, 70.7 & 100 V appli-
cations with voice coil/16 Ohm bypass.
Shipping Weight
Accessories
5.0 lb / 2.3 kg
I n c l u d e d
Tile bridge, UL listed flex conduit clamp, paint shield, hole
template, wire nuts
Optional
Pre-Construction Bracket (AC-CMEZ42-PCB) ; Junction Box
(AC-CM-EZ-JBOX)
1 per box
Packaging
Regulatory - UL
Regulatory - CE
1480 & 2043 Approved
Approved
1
Transformer Taps
1w1m sensitivity determined using nominal
impedance
70.7 V Output
100 V Output
25 V Output
2.5 w 91.5 dB
1 w 88.5 dB
2
3
Frequency response measured in half or
full space as dictated by speaker mounting
configuration
20 w 100.5 dB 20 w 100.5 dB
10 w 97.5 dB 10 w 97.5 dB
Max program power is 3 dB above max
continuous power
5 w 94.5 dB
5 w 94.5 dB 0.63 w 85.5 dB
0.31 w 82.5 dB
2.5 w 91.5 dB
4
5
6
Continuous power rating, EIA-426-B test
Max output based on max continuous power
Max useable SPL based on testing
by NWAA Labs
© 2008 SoundTube Entertainment. All rights reserved. PN-TS-CMEZ REV 06.05.08
Download from Www.Somanuals.com. All Manuals Search And Download.
In-Ceiling Speaker
CM42-EZs
Technical Information for System Engineers
for added security, or where required
by code.
Performance specifications of a typi-
cal production unit shall be as follows:
Usable frequency range shall extend
Independent Data
Acquisition & Verification
Installation for the CM42-EZs shall be
by 2-screw blind-mount constant-ten-
sion winged assembly and shall attach
to ceiling thicknesses ranging from
0.00 in to 1.50 in. The external wiring
shall be hardwired using wire nuts
accepting up to three 18-gauge wires.
All data for SoundTube speakers is
independently collected from and veri-
com) using their proprietary MACH
testing system. All data is collected and
analysed according to ASTM, ISO and
AES standards using EASERA, TEF and
MLSSA. Full balloon data including both
phase and magnitude is compiled into
a variety of formats including EASE 4.x,
GLL and CLF.
from 120 Hz - 22 kHz, -10 dB. The
loudspeaker shall be available with
selectable 25/70.7/100 Volt and 16
Ohm/voice coil direct tap switch. The
frequency dividing network shall
have a crossover frequency of 5.0 kHz.
Rated power capacity of the compo-
nents and network shall be at least 20
Watts continuous RMS power and con-
form to EIA-426-B testing. Maximum
continuous output at 1 meter shall be
at least 100.5 dB.
The CM42-EZs is factory preset to
the 20 Watt setting in the 70.7 Volt
mode with a tap switch located on the
front baffle. The system shall be the
SoundTube CM42-EZs for both low &
high impedance applications.
Architectural Specifications
The backcan shall be constructed of
galvanized steel with an ABS plastic
baffle. The grille shall be constructed
of painted steel. Shipped complete
with UL-listed flex conduit clamp,
color coded tile bridge (to match color-
coded backcan), grille, wire nuts,
cut-out template and paint shield,
the integrated CM42-EZs in-ceiling
speaker is engineered for high per-
formance and rapid installation in
plenum spaces. The CM42-EZs incor-
porates a secondary attachment point
The loudspeaker shall consist of one
102 mm (4 in) low-frequency trans-
ducer and one 19 mm ( 0.75 in) high-
frequency transducer with a frequency
dividing network installed in a sealed
enclosure. The low-frequency voice
coil diameter shall be 13 mm (0.50 in).
The low-frequency transducer shall
have a treated fiber cone material with
cloth surround. The high-frequency
transducer shall be constructed of silk
material using a balanced-dome con-
figuration.
SoundTube Entertainment
6430 North Business Park Loop
Park City, Utah 84098
Phone 435.647.9555
Fax
435.647.9666
Toll Free 800.647.TUBE
All SoundTube products come
with a 5-year limited warranty.
Vertical
Horizontal
Polar Plots
250 Hz
500 Hz
1,000 Hz
125 Hz
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Technical data, EASE plots, SoundTubeSPEC software & product downloads available at www.soundtube.com
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In-Ceiling Speaker
CM42-EZs
Technical Information for System Engineers
Mechanical Drawings
Side
Top
95.3 mm
(3.75 in)
146.8 mm
(5.78 in)
165.1 mm
(6.50 in)
Included Accessories
167.64 mm
(6.60 in)
250.55 mm
(9.86 in)
600.0 mm
(23.62 in)
Paint Mask
Tile Bridge
Optional Accesories
m
0 m
)
0
n
.
8
0 i
0
0
.
5
4
2
(
Junction Box (AC-CM-EZ-JBOX)
Pre-Construction Bracket (AC-CMEZ42-PCB)
SoundTube Entertainment manufactures a complete line of speakers for:
Open-Ceiling • In-Ceiling • Surface-Mount • Outdoor • Sound-Focusing
All SoundTube products are designed and engineered in the USA.
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