EAW Cinema MC4973 Technical Specifications

Technical Specifications MC4973

CINEMA SERIES

APPLICATION

• For large and very large cinemas

• Triamplified 3-way screen channel loudspeaker

• THX®-Approved

PRODUCT INFORMATION

The MC4973 full-range screen channel loudspeaker system brings 3­way design to the largest cinema exhibition spaces. This system
provides extremely high output and must be powered by a minimum
of three amplifier channels (triamplification).

The MC4973 has been approved by the THX division of Lucasfilm,
Ltd., for use in THX-certified theaters.

Three-way design dramatically advances cinema audio quality by
improving the naturalness and intelligibility of dialog, eliminating
distortion from excessive driver excursion and extending pattern
control into the lower octaves.

The MC4973 combines many of EAW’s breakthrough technologies
including the mathematically correct mid/bass horn with phase/
displacement plug, "push/pull" low frequency technology and the
"short-throat" high frequency horn.

MC4973

85.84

31.44

36.00

20.87

40.00

TOP

71.16

29.75

INPUTS THIS

SIDE ONLY

HANDLES

BOTH SIDES

The three component system includes 4x 15-in woofers in a "push/
pull" configuration, 2x horn-loaded 10-in mid frequency cones and
a horn-loaded 2-in exit high frequency compression driver.

The "push/pull" configuration of the LF section reduces mechani­cally induced distortion at high output levels. To move air "forward"
(away from the enclosure) half of the woofers push while the other
half pull.

The MC4973’s mathematically-correct MF horn with phase plug
drastically reduces the horn-throat cancellation distortion that
degrades the naturalness and intelligibility of dialog. By dividing
the mid/high material between two horn-loaded subsystems, pat­tern control over the entire frequency range is enhanced.

The HF element - an HK294 HF system - features a 2-in exit
compression driver loaded with a short-throat 90° x 40° HF horn
ensuring even distribution of HF information throughout the audi­torium.

Each section is provided with its own input connector. The input
panels are located on the sides of the enclosures for convenient
access in cramped installation areas.

All external components feature a “dead” flat black finish to
eliminate the reflection of light through perforated cinema screens.

exp 5/18/98 mka

FRONT

ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED.

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. • PUB# MC4973/11/17/98 • Printed In USA

THX is a registered trademark of Lucasfilms Ltd.

SIDE

THX is a registered trademark of Lucasfilm, Ltd.

Technical Specifications MC4973

CINEMA SERIES

COMPONENTS & CONSTRUCTION

The MC4973 is a triamplified, three-way, very high-output, full range
three section loudspeaker system intended for use in behind-screen
cinema applications. The optimally vented LF enclosure houses 4x
15-in woofers in a "push/pull" configuration. Dual horn-loaded 10­in midrange drivers are housed in a separate MF enclosure. A 2-in exit
high frequency compression driver loaded with a 90° x 40° constant
directivity horn is mounted above the MF enclosure.

The system requires the use of a three band external active electronic
crossover. Crossover between the LF and MF sections is recom­mended to be 350 Hz. Crossover between the MF and HF sections is
recommended to be 1.8 kHz.

Each section is provided with its own input connector. The input
panels are located on the sides of the enclosures for convenient
access in cramped installation areas.

The cabinets are constructed of 15mm void-free, 18-ply-to-the­inch, Baltic birch plywood. Extensive internal bracing is provided to
minimize panel resonance resulting from the large acoustical
energies generated within the enclosure. The enclosure and all
external parts are coated with a flat black polyurethane finish.

DESCRIPTIVE DATA

Part Number 999709

LF Subsystem & Loading 4x 15-in, vented
MF Subsystem & Loading 2x 10-in, horn-loaded
HF Subsystem & Loading 1x 2-in exit compression driver

on CD horn

Number of Audio Bands 3-way

Type of Audio Bands Full Range

Powering Mode Triamplified

System Crossover Active (LF/MF - 300 Hz; MF/HF 1.8 kHz)

Recommended High-Pass

Frequency (24 dB/Octave) 30 Hz

Cabinet Type (shape) Rectangular

Enclosure Materials 15mm Baltic Birch Plywood

Finish Flat Black

Connectors 3x 2 terminal barrier strip

NOMINAL DATA

Frequency Response (1 Watt @ 1m)

±3 dB 35 Hz - 18 kHz

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

LF 103
MF 109
HF 111

Impedance (Ohms)

LF 2x 4
MF 4
HF 12

Power Handling, AES Standard (Watts)

LF 2000
MF 700
HF 200

Calculated Maximum Output (dB SPL @ 1m)

LF Peak 142.0
MF Peak 143.5
HF Peak 140.0

LF Long Term 136.0
MF Long Term 137.5
HF Long Term 134.0

Nominal Coverage Angle/-6 dB points (degrees)

Horizontal 90

Vertical 40

Recommended Complementary Systems

Sub SB284C

Dimensions Inches Centimeters

Height 86.00 218.5

Width 36.00 91.4
Depth 30.00 76.2

Weights Pounds Kilograms

Net Weight 505 230.0

Shipping Weight 540 245.0

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. • PUB# MC4973/11/17/98 • Printed In USA

THX is a registered trademark of Lucasfilms Ltd.