TECHNICAL SPECIFICATIONS SB284C
CINEMA SYSTEMS
DESCRIPTIVE DATA
Part Number 999082
Sub System & Loading 2x 18-in, vented
System Crossover 100 Hz recommended
Recommended High-Pass
Frequency (24 dB/octave) 20 Hz
Cabinet Type (shape) Rectangular
Enclosure Materials 3/4-in Medium Density Fiberboard,
15 mm birch baffle
Finish Textured black
Connectors Dual-terminal barrier strips
Grille Vinyl coated perforated steel
Dimensions inches millimeters
Height 29.75 756
Width 48.25 1226
Depth 23.75 603
Weights pounds kilograms
Net Weight 218 98.9
Shipping Weight 233 105.7
PRODUCT INFORMATION
APPLICATION
• For subwoofer channel of cinema soundtrack
• THX® approved
The SB284C cinema subwoofer loudspeaker system uses dual 18-in
cone transducers each mounted in its own optimally vented suben-
closure to fill large capacity theaters theaters with high definition
sub bass information at earth-shaking output levels. This system has
been approved by the THX® division of Lucasfilm, Ltd., for use in THX
certified theaters.
The SB284C’s optimally vented enclosure uses enclosure resonance to
increase sub bass response while limiting driver excursion. This
method produces less distortion and minimizes driver strain while
extending sub bass response to the lower limits of human hearing.
Special effects will have greater clarity, greater power and greater
impact.
Each 18-in woofer is individually accessible via a two-terminal bar-
rier strip, which accommodates bare wire, tinned leads or spade lugs,
located on the side of the enclosure for convenient access in
cramped installation areas.
The use of multiple SB284C’s provides even greater output
capability and further extends low frequency response.
TECHNICAL SPECIFICATIONS SB284C
1.50
7.28
RIGHT SIDE
FRONT BACK
1.50
5.28
29.75
23.75
LEFT SIDE
48.25
TOP
SB284C ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED.
BOTTOM
510136
exp 1/15/97 shb
NOMINAL DATA
Frequency Response
+3 dB 30 Hz - 300 Hz
Axial Sensitivity (dB SPL, 1 Watt @ 1m)
99
Impedance (Ohms)
4
Power Handling, AES Standard (Watts)
1600
Calculated Maximum Output (dB SPL @ 1m)
Peak 137.0
Long Term 131.0
COMPONENTS & CONSTRUCTION
The SB284C is a high output, extended bandwidth subwoofer
optimized specifically for cinema use. It features dual high power
18-in low frequency transducers, each mounted in its own optim-
ally vented subenclosure.
The enclosure is constructed of 3/4-in Medium Density Fiberboard
except for the baffle plate which is 15mm, void-free, cross-grain-
laminated birch plywood. Extensive internal bracing is employed to
minimize panel resonances resulting from the large acoustical
energies generated within the enclosure and maximize acoustical
energy transfer.
Input connectors are 2-terminal barrier strip, designed to accom-
modate bare wire, tinned leads or spade lugs.
All external components feature a textured black finish to eliminate
the reflection of light through perforated cinema screens.
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 #888134 (B) MAY, 2001 • Printed in USA
THX is a registered trademark of Lucasfilms Ltd.
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