EAW MC4973B Technical Specifications

Technical Specifications MC4973B

CINEMA SERIES

APPLICATION

• For large and very large cinemas

• Biamplified 3-way screen channel loudspeaker

PRODUCT INFORMATION

The MC4973B full-range screen channel loudspeaker system brings
3-way design to the largest cinema exhibition spaces. Its passive
mid/high biamplified design lets it replace existing biamped two­way systems without requiring new electronic crossovers or ampli­fiers. (Electronic crossovers settings may need to be adjusted.)

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 MC4973B 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.

MC4973B

85.84

exp 5/18/98 mka

31.44

36.00

20.87

FRONT

ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED.

TOP

71.16

40.00

29.75

SIDE

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 MC4973B’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 MC4973B requires the use of an external active electronic
crossover between the LF section and mid/high section which
includes an internal passive crossover/filter network. EAW's com­plex, computer-designed passive filter networks are tightly aligned
to the loudspeakers they control and go beyond merely dividing the
signal, performing critical equalization functions.

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.

Input connectors for the LF and MF sections are two-terminal barrier
strips. A "jumper cable" is included to continue the signal chain to
the HF section. Bind posts for the HF section are located directly on
the compression driver. 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.

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# MC4973B/11/16/98 • Printed In USA

Technical Specifications MC4973B

CINEMA SERIES

COMPONENTS & CONSTRUCTION

The MC4973B is a biamplified, three-way, very high-output, full
range three section loudspeaker system intended for use in behind­screen cinema applications. The optimally vented LF enclosure
houses 4x 15-in woofers in a "push/pull" configuration. Dual horn­loaded 10-in 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 an external active electronic
crossover between the LF and mid/high sections. The mid/high
component includes a internal passive crossover/filter network.
EAW's complex, computer-designed passive filter networks are
tightly aligned to the loudspeakers they control and go beyond
merely dividing the signal, performing critical equalization func­tions.

Input connectors for the LF and MF sections are two-terminal barrier
strips. A "jumper cable" is included to continue the signal chain to
the HF section. Bind posts for the HF section are located directly on
the compression driver. 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

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 Biamplified

System Crossover Active LF/MF - 300 Hz; Passive MF/HF

Recommended High-Pass

Frequency (24 dB/Octave) 30 Hz

Cabinet Type (shape) Rectangular

Enclosure Materials 15mm Baltic Birch Plywood

Finish Flat Black

Connectors 2x 2-Terminal Barrier Strips (LF and MF)

plus Bind Posts (HF, jumper cable
included)

NOMINAL DATA

Frequency Response (1 Watt @ 1m)

±3 dB SMPTE/ISO 2969 "X" curve

35 Hz - 18 kHz

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

LF 103

MF/HF 108

Impedance (Ohms)

LF 2x 4

MF/HF 4

Power Handling, AES Standard (Watts)

LF 2000

MF/HF 600

Calculated Maximum Output (dB SPL @ 1m)

LF Peak 142.0

MF/HF Peak 141.8

LF Long Term 136.0

MF/HF Long Term 135.8

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# MC4973B/11/16/98 • Printed In USA