CINEMA SERIES
One Main Street, Whitinsville, MA 01588 • (508) 234-6158 • FAX (508) 234-8251 • Email info@eaw.com • 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.
Technical Specifications MC4973
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
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 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 a three band external active electronic
crossover. Crossover between the LF and MF sections is recom-
mended 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-the-
inch, 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.
