EAW CH491 Technical Specifications

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TECHNICAL SPECIFICATIONS CH491

DESCRIPTION

A 2-way mid/high system (passive crossover) housed in a
trapezoidal enclosure. Includes a horn-loaded 10-in midrange
cone and a 1-in exit compression driver on a 90 x 45 con­stant directivity horn.

APPLICATIONS

The CH491 compact Virtual Array mid/high module works
with BH or BV Series LF systems to create true 3-way arrays
in permanent installations. 3-way design dramatically im­proves the quality of vocal reproduction while the cone-driven
midrange horn extends pattern control into the lower oc­taves. Also effective as a stand-alone, voice-only system.
Comprehensive 3/8"-16 mounting/suspension points. Six year
warranty.

Applications include:

Stadiums
Arenas
Convention Centers
Large HOW’s
Small HOW’s
Major Malls

DESCRIPTIVE DATA

Part Number 999096

Product Group I
MF Subsystem & Loading 1x 10-in Horn-Loaded Cone
HF Subsystem & Loading 1x 1-in Exit Compression Driver on

Constant Directivity Horn

System Configuration 2-way, mid/high

Powering Configuration(s) Passive MF/HF Crossover

Recommended High-Pass

Frequency (24 dB/Octave) 125Hz

Cabinet Type (shape) Trapezoidal

Enclosure Materials Baltic Birch Plywood

Finish Black Catalyzed Polyurethane

Connectors 4-pin Barrier Strip & 1x Neutrik

NL4 Speakon

Suspension Hardware (20) 3/8”-16 Threaded Mounting/

Suspension Points (5 each Top and
Bottom, 4 per Side, 2 on rear)

Grill Vinyl Coated Perforated Steel

NOMINAL DATA

Frequency Response (Hz)

±3 db 200Hz to 15kHz

-10 dB 125Hz

Axial Sensitivity (dB SPL/1 Watt/1m)

105

Impedance (Ohms)

8

Power Handling (Watts)

AES Standard 300

Calculated Maximum Output (dB SPL, @ 1m)

Peak 135.8

Long term 129.8

Nominal Coverage Angle / -6 dB points (degrees)

Horizontal 90

Vertical 45

Dimensions inches millimeters

Height 22.5 572

Width 24.63 626

Depth 19.75 502

Trapezoid Angle 16.5 degrees per side

Weights pounds kilograms

Net Weight 100 45.5

Shipping Weight 110 50.1

EASTERN ACOUSTIC WORKS

One Main Street, Whitinsville, MA 01588 • (508) 234 - 6158 • FAX (508) 234 - 8251 • Email [e-mail] • Web http://www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. • PUB# CH491 999096 (A)/2p/3/14/97 • Printed In USA

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TECHNICAL SPECIFICATIONS CH491

DIMENSIONAL DRAWING SERVICE ITEMS

DIMENSIONAL DRAWINGS

CH491

FRONT

9.00

19.75

510219
exp 2/16/97 shb

MOUNTING POINT, 3/8"-16 THREADED HOLE.

DIMENSIONS LABELED "NOM" ARE +0 / -1/16"

ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED.

CENTER OF GRAVITY.

3.57

12.75

6.00

10.50

3.50

2.00

22.50

2.00

BACK

12.75

10.45

18.41

24.63

TOP

2.50

33°

2.68 TYP

13.24 REF

3.83 TYP

A

A

1.88 TYP

2.68 TYP

BOTTOM

12.00

2.50

13.83

5.75

SIDE

VIEW A-A

13.83 TYP

18.50

4.56 REF

20.62

MF: Complete Cone Driver

EAW Part No. 804021

HF: Complete Compression Driver/Tweeter

EAW Part No. 803006

Filter/Crossover Network: Complete Assembly

EAW Part No. 225060

ARCHITECTURAL SPECIFICATIONS

The passive mid/high loudspeaker systems shall incorporate
a 10-in MF transducer and 1-in exit compression driver HF
transducer.

The MF driver shall be loaded into a constant horizontal cov­erage horn constructed of 3mm birch plywood reinforced with
high density polyurethane foam. The MF horn shall incorpo­rate a phase/displacement plug. The HF driver shall be loaded
on a constant directivity horn with a nominal coverage pat-

tern of 90° (h) x 45° (v). An internal passive filter network

shall provide fourth order acoustical crossover and system
equalization.

System frequency response shall vary no more than ±3 dB

from 200 Hz to 15 kHz measured on axis. The loudspeaker
shall produce a Sound Pressure Level (SPL) of 105 dB SPL on
axis at 1 meter with a power input of 1 Watt, and shall be
capable of producing a peak output of 135.8 SPL on axis at
1 meter. The loudspeaker shall handle 300 Watts of amplifier
power (AES Standard) and shall have a nominal impedance
of 8 Ohms.

The loudspeaker enclosure shall be trapezoidal in shape. It
shall be constructed of 15mm thickness void-free cross-grain­laminated Baltic birch plywood and shall employ extensive
internal bracing. It shall be finished in black catalyzed poly­urethane. Input connectors shall be 4-terminal barrier strip
and 1x Neutrik NL4 Speakon. A total of twenty 3/8"-16
threaded mounting/suspension points (5 each on top and
bottom, 4 per side, 2 on rear) shall be provided. The front of
the loudspeaker shall be covered with a vinyl coated perfo­rated steel grill.

The mid/high loudspeaker shall be the EAW model CH491.

Acoustic Performance Partnership Eastern Acoustic Works CH491

One Main Street, Whitinsville MA, 01588 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • Web http://www.eaw.com • email [e-mail]