Open-Ceiling Speaker
CM-EZ-II
Technical Information for System Engineers
Key Features
• SnapCam™ 4-point, spring-loaded
system for rapid installation.
• One 203 mm (8 in) Polypropylene cone
with butyl rubber surround and one
25 mm (1 in) polypropylene balanced-
dome tweeter with FerroFluid™.
Specifications: CM-EZ-II
Tile bridge included
• Integrated backcan and 25/70.7/100 Volt
and 8 Ohm tap settings for ease of
ordering, stocking and installation.
System Type
8” Coax, open-ceiling, sealed (20 Watt transformer for
25/70.7/100 Volt or 8 ohm direct)
8 ohm
93.0dB
93.0dB
N/A
76 Hz - 22 kHz
54 Hz - 22 kHz
80w
40w
40w
109.0dB
N/A
100°
Impedance (nominal) 1
Sensitivity dB @ 2.83V/1M
Sensitivity dB @ 1W/1M 2
Distance Factor
Frequency Response (- 3 dB) 3
Frequency Response (-10 dB) 3
Max. Program Power 4
Max. Continuous Power RMS 5
Max. UL program power
Max. Power SPL @ 1 M 6
Max. SPL @ x% distortion 7
Coverage Angle (-6 dB @ 2 kHz)
• Quick release mechanism for easy servicing.
• UL/c, UL 1480 & 2043, CE (EMC
Directive 89/366/EEC, EN55020,
EN55013) approved.
• Adaptable to material thicknesses
ranging from 1/2 in (12.70 mm)
to 3/4 in (19.05 mm).
Description
The CM-EZ-II is a 2-way blind-mount
in-ceiling speaker. The CM-EZ-II speaker
design incorporates an 8" polypropylene
driver with rubber surround and a 7.3
liter steel backcan for extended frequency
response (54 Hz – 22 kHz, - 10 dB).
SoundTube’s integrated CM-EZ-II design
includes unique & patented blind mount
SnapCam™ installation technology and a
21-gauge steel tile bridge ensuring rapid
and secure installation in any sheetrock
or drop-tile ceiling. For easy ordering,
stocking and installation, the CM-EZ-II
comes with a 6-position tap switch for
25, 70.7 & 100 V applications with voice
coil/8 Ohm bypass.
Coverage Angle (-6 dB @ 10 kHz) 65°
Directivity Factor (Q)
Directivity Index (DI) dB
Tap Selector
6.09
6.2dB
7.33
8.7dB
Avg. 100 Hz @ 10 kHz;
Avg. 100 Hz @ 10 kHz;
@ 2 kHz
@ 2 kHz
6-Position rotary switch with 8 ohm direct
Transducer - Low Frequency Driver 203mm (8in) Polypropylene cone, butyl rubber surround
Transducer - High Frequency Driver 25mm (1in) Polypropylene dome tweeter
Low Frequency Voice Coil
Crossover Frequency
Network Type: Low Pass
Network Type: High Pass
Enclosure Material
Motor-board
25.4mm 1.00in
5.6kHz
6dB per octave, 1st order
6dB per octave, 1st order
Drawn steel backcan with ABS baffle
N/A
Grille
Inputs
Colors
Iridite-plated steel with powder-coat finish
18-Gauge hard wired leads
Black or white
Backcan Diameter
Backcan Height
Visible Diameter
Visible Height
9.13 in / 231.8 mm
7.50 in / 190.5 mm
10.75 in / 273.1 mm
0.20 in / 5.1 mm
Applications
Mounting Hole Diameter
Min / Max Ceiling Thickness
Weight
Shipping Weight
Accessories
Included
Optional
Packaging
9.75 in / 247.7 mm
0.50 in / 12.7 mm – 0.75 in / 19.1 mm
7.0 lb / 3.2 kg
Engineered for general background to
foreground music & paging applications,
the CM-EZ-II is ideal for retail stores,
restaurants, airports, churches, conference
centers & boardrooms.
7.9 lb / 3.6 kg
Tile bridge, UL listed flex conduit clamp, paint shield
Pre-Construction Bracket (AC-CM-EZ-PCB)
1 per box
Patented SoundTube
Technologies
1
Transformer Taps
Impedance listed per IEC 60268-5
2
3
SoundTube Entertainment is constantly
developing new technologies that enhance
audio product performance. SoundTube
Entertainment innovations are protected
by multiple U.S. & international patents,
which explicitly cover SoundTube dome,
enclosure and dispersion technologies.
SoundTube Entertainment actively defends
its patents in order to protect SoundTube
resellers and end users.
1w1m sensitivity determined using nominal
impedance
70.7 V Output
20w 106.0dB
10w 103.0dB
5w 100.0dB
100 V Output
20w 106.0dB
10w 103.0dB
5w 100.0dB
25 V Output
2.5w 97.0dB
1.3w 94.0dB
0.63w 91.0dB
Frequency response measured in half or
full space as dictated by speaker mounting
configuration
4
Max program power is 3 dB above max
continuous power
2.5w 97.0dB 2.5w 97.0dB
1.25w 94.0dB
5
6
7
Continuous power rating, EIA-426-B test
Max output based on max continuous power
Max useable SPL based on testing
by NWAA Labs
© 2005 SoundTube Entertainment. All rights reserved. PN-TS-CMEZ REV 10.03.07
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Open-Ceiling Speaker
CM-EZ-II
Technical Information for System Engineers
surfaces thicker than 5/8 in (15.87 mm),
proper installation requires removing
the rubber feet on the cam mechanisms.
Refer to the CM-EZ-II Pre-Construction
Bracket Installation Instructions at
www.soundtube.com.
The backcan shall be constructed of
zinc-plated steel with an ABS plastic
bezel. The grille shall be constructed
of powder-coated steel. The low-fre-
quency transducer shall have a poly-
propylene cone material with butyl
rubber surround. The high-frequency
transducer shall be constructed of
polypropylene material using a bal-
anced-dome configuration.
Architectural Specifications
The loudspeaker shall consist of a
203 mm (8 in) low-frequency trans-
ducer and one 25 mm (1 in) high-fre-
quency transducer with a frequency
dividing network installed in a sealed
enclosure. The low-frequency voice
coil diameter shall be 25 mm (1 in).
The system shall be the SoundTube
CM-EZ-II for both low & high imped-
ance applications.
Performance specifications of a
typical production unit shall be as
follows: Usable frequency range shall
extend from 54 Hz - 22 kHz. The
loudspeaker shall be available with
selectable 25/70.7/100 Volt and 8 Ohm/
voice coil direct tap switch. The fre-
quency-dividing network shall have a
crossover frequency of 5.6 kHz. Rated
power capacity of the components and
network shall be at least 40 Watts con-
tinuous RMS power.
SoundTube Entertainment
6430 North Business Park Loop
Park City, Utah 84098
Packaged complete with UL-listed
flex conduit clamp, tile bridge, grille,
cut-out template and paint shield,
the integrated CM-EZ-II open-ceiling
speaker is engineered for high per-
formance and rapid installation in
plenum spaces. The CM-EZ-II incor-
porates a secondary attachment bolt
for added security, or where required
by code.
Phone 435.647.9555
Fax
435.647.9666
Toll Free 800.647.TUBE
All SoundTube products come
with a 5-year limited warranty.
The CM-EZ-II installation shall be
by 4-point blind-mount system using
spring-loaded cams and a tile bridge.
The CM-EZ-II’s spring-loaded cams are
adaptable to stable surfaces including
drop tile and sheetrock with mate-
rial thicknesses ranging from 1/2 in
(12.70 mm) to 3/4 in (19.05 mm). For
Designed for both 25/70.7/100 Volt
and 8 Ohm/voice coil direct applica-
tions, the CM-EZ-II is factory preset to
the 70.7 at 20 Watts operating mode,
with a tap switch located on the back-
can.
Polar Plots
250 Hz
500 Hz*
1,000 Hz
125 Hz
*
4,000 Hz
8,000 Hz
10,000 Hz
2,000 Hz
*Polar response is normalized to allow proper interpretation of data.
™
™
Technical data, EASE plots, SoundTubeSPEC software & product downloads available at
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Open-Ceiling Speaker
CM-EZ-II
Technical Information for System Engineers
Mechanical Drawings
Side
Top
ø 274 mm
(10.75 in)
228 mm (9.125 in)
190 mm
(7.5 in)
274 mm (10.75 in)
5 mm
(0.20 in)
Included Accessories
600.1 mm
(23.62 in)
359 mm
(14.13 in)
248 mm
(9.76 in)
Paint shield
Tile Bridge
Optional Accessory
641 mm (25.625 in)
ø 285 mm
(11.25 in)
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ø 247 mm
(9.75 in)
Max.
19.05 mm (.75 in)
Min.
12.70 mm (.50 in)
Snap-cam Mounting System
Pre-Construction Bracket (AC-CM-EZ-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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