EAW CR72 User Manual

Technical Specifications CR72

CINEMA SERIES

APPLICATION

• For small to large cinemas

• Passive 2-way surround channel loudspeaker

• THX®-approved

PRODUCT INFORMATION

The CR72 two-way, passive, full range cinema surround loudspeaker
system is engineered to reproduce today’s full bandwidth digital
surround tracks in smaller cinemas. It features an 8-in woofer and
a 1-in dome tweeter loaded with EAW’s proprietary WGP® (Wave
Guide Plate®) mounted in a slanted baffle.

This system is approved by the THX division of Lucasfilm, Ltd., for
use in THX-certified theaters.

The CR72 is specifically engineered to cover a larger seating area
with higher quality, higher output sound than traditional cinema
surrounds. With 150 Watts AES standard power handling and a 110°
conical coverage pattern, it can be mounted higher than traditional
surrounds. Higher placement lets the system cover a larger area
"across" the room creating a larger area of stereo surround coverage
than traditional surround placement. The WGP’s
sion pattern lets CR72’s be used in cinemas with low ceilings without
sacrificing coverage of fringe seats.

®

extra wide disper-

CR72

2.75

7.00

5.00

FRONT

16.50

C

L

BACK

7.56

INDICATES 3/8-16 THREADED MOUNTING HOLE

INDICATES 5/16-18 THREADED MOUNTING HOLE

INDICATES CENTER OF BALANCE

12.41

4.93

70°

6.59

1.75

5.25

7.25

7.56

16.09

RIGHT SIDE

DIMENSIONS APPLY TO

C

L

BOTH SIDES

4.94

TOP

510565 (2)

exp 11/16/98 dpm

The passive crossover/filter network included in the CR72 goes
beyond merely dividing the signal and actually performs critical
equalization functions. This means it will provide more detailed,
more natural reproduction of any sonic event occurring in the 360°
aural arena. The crossover/filter network tailors HF response to
match the SMPTE/ISO 2969 response curve.

The front baffle is angled down 20° to accommodate overhead
mounting. The optimally vented enclosure increases LF response
while limiting driver excursion. This method produces less distortion
and minimizes driver strain while extending LF response to the
lowest octaves.

THX is a registered trademark of Lucasfilm, Ltd.

One Main Street, Whitinsville, MA 01588 • [phone] • FAX [phone] • Email [e-mail] • Web http://www.eaw.com

EAW products are continually improved. All specifications are therefore subject to change without notice. • CR72 PUB#888132 Rev(A)/6/1/99• Printed In USA

THX is a registered trademark of Lucasfilms Ltd.

Technical Specifications CR72

CINEMA SERIES

The input connector – a 2-terminal barrier strip that accommodates
bare wire, tinned leads or spade lugs - is located on top of the
enclosure. The enclosure features a textured black finish to elimi­nate visual intrusion of visible surrounds. For safety, the cloth grill
is attached with multiple threaded fasteners.

COMPONENTS & CONSTRUCTION

The CR72 two-way, passive, full range cinema surround loudspeaker
system includes one 8-in cone transducer mounted in an optimally
vented enclosure and one 1-in soft dome driver coupled with a
WGP®. The LF and HF sections are integrated with a complex,
multicomponent passive crossover/filter network which tailors HF
response to match the SMPTE/ISO 2969 response curve.

The enclosure is constructed of 3/4-in Medium Density Fiberboard
(MDF). Extensive internal bracing is employed to minimize panel
resonances resulting from the large acoustical energies generated
within the enclosure while maximizing acoustical energy transfer
into the audience area.

Input connectors, located on the top of the enclosure, are 2­terminal barrier strip, designed to accommodate bare wire, tinned
leads or spade lugs. For safety, the black cloth grill is attached with
multiple threaded fasteners.

DESCRIPTIVE DATA

LF Subsystem & Loading 1x 8-in Cone, Vented

HF Subsystem & Loading 1x 1-in Soft Dome Tweeter on WGP™

Number of Audio Bands 2-way

Powering Mode Passive

System Crossover Passive

Recommended High-Pass

Frequency (24 dB/Octave) 50 Hz

Cabinet Type (shape) Rectangular, slant baffle

Enclosure Materials MDF

Finish Textured Black

Connectors 2-terminal barrier strip

Suspension Hardware (2) 3/8-16 threaded points (1 per side)

Grill Black Cloth on plastic frame

NOMINAL DATA

Frequency Response

±3 dB SMPTE/ISO 2969 "X" curve

66 Hz - 19 kHz

-10 dB 45 Hz

Axial Sensitivity (dB SPL, 1 Watt @ 1m)

Full Range Passive 95

Impedance (Ohms)

Full Range Passive 8

Power Handling, AES Standard (Watts)

Full Range AES Standard 150

Calculated Maximum Output (dB SPL @ 1m)

Full Range Peak 122.8

Full Range Long Term 116.8

Nominal Coverage Angle/-6 dB points (degrees)

Conical 110

Dimensions & Weights Inches Centimeters

Height 16.09 40.9

Width 16.50 41.9

Depth (Top) 12.12 30.8

Depth (Bottom) 6.26 15.9

Weights Pounds Kilograms

Net Weight (approx) 26 11.8

Shipping Weight (approx) 33 15.0

One Main Street, Whitinsville, MA 01588 • [phone] • FAX [phone] • Email [e-mail] • Web http://www.eaw.com

EAW products are continually improved. All specifications are therefore subject to change without notice. • CR72 PUB#888132 Rev(A)/6/1/99• Printed In USA

THX is a registered trademark of Lucasfilms Ltd.