Phase Technology CM42-EZs User Manual

Cm42-ezs, In-ceiling speaker

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.
• Reduced amplification costs with

maximum efficiency including 87.5 dB

sensitivity and16 Ohm impedance.
• 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.
• Incorporates a painted steel grille for

lasting durability.
• UL 1480 & 2043, cUL, CE (EMC Direc-

tive 89/366/EEC, EN55020, EN55013)

approved.
• Adaptable to material thicknesses

ranging from 0.00 in (0.0 mm) to 1.50 in

(22.9 mm).
• Included accessories: Tile bridge, UL

listed 0.5” flex conduit clamp, paint

shield & 2 wire nuts.
• Optional accessories: Color-coded

(orange) pre-construction bracket

(AC-CM4-PCB), junction box (AC-CM-EZ-

JBOX).
• High-quality black or white painted

finish. Custom colors available.

Description

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.

CM42-EZs

In-Ceiling Speaker

Technical Information for System Engineers

Tile bridge included

Specifications: CM42-EZs

System Type

Impedance (nominal)
Sensitivity dB @ 2.83V/1M
Sensitivity dB @ 1W/1M

Frequency Response (- 3 dB)

Frequency Response (-10 dB)

Max. Program Power

Max. Continuous Power RMS

Max. Power SPL @ 1 M

Max. SPL @ 3 dB Distortion

Coverage Angle (-6 dB @ 2 kHz)
Coverage Angle (-6 dB @ 10 kHz)
Coverage Angle
Directivity Factor (Q)
Directivity Index (DI) dB
Tap Selector
Transducer - Low Frequency Driver
Transducer - High Frequency Driver
Low Frequency Voice Coil
Crossover Frequency
Network Type: Low Pass
Network Type: High Pass
Enclosure Alignment
Enclosure Material
Grille
Inputs
Colors
Backcan Diameter
Backcan Height
Visible Diameter
Visible Height
Mounting Hole Diameter
Min / Max Ceiling Thickness
Weight
Shipping Weight
Accessories
Included

Optional

Packaging
Regulatory - UL
Regulatory - CE

4" Coax, in-ceiling, sealed (20 Watt transformer for
25/70.7/100 Volt or 16 Ohm direct)
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
170º
95º
100º (Avg. from 2 - 10 kHz)
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
102 mm (4 in) Treated fiber cone, cloth surround
19 mm (0.75 in) Silk tweeter
12.70 mm / 0.50 in
5.0 kHz
12dB per octave, 2nd order
6 dB per octave, 1st order
Sealed
Drawn steel backcan with ABS baffle
Painted Steel
18-Gauge hard wired leads
Black or white
5.78 in / 146.8 mm
3.75 in / 95.3 mm
7.50 in / 190.5 mm
0.33 in / 8.4 mm
6.50 in / 165.1 mm
0.00 in / 0.0 mm – 1.5 in / 38.1 mm
4.0 lb / 1.8 kg
5.0 lb / 2.3 kg

Tile bridge, UL listed flex conduit clamp, paint shield, hole
template, wire nuts
Pre-Construction Bracket (AC-CMEZ42-PCB) ; Junction Box
(AC-CM-EZ-JBOX)
1 per box
1480 & 2043 Approved
Approved

Transformer Taps
70.7 V Output

100 V Output 25 V Output

20 w 100.5 dB
10 w 97.5 dB

5 w 94.5 dB

2.5 w 91.5 dB

20 w 100.5 dB
10 w 97.5 dB

5 w 94.5 dB

2.5 w 91.5 dB

1 w 88.5 dB

0.63 w 85.5 dB
0.31 w 82.5 dB

1w1m sensitivity determined using nominal
impedance

Frequency response measured in half or
full space as dictated by speaker mounting
configuration

Max program power is 3 dB above max
continuous power

Continuous power rating, EIA-426-B test
Max output based on max continuous power
Max useable SPL based on testing
by NWAA Labs