JBL CINEMA SOUND SYSTEM MANUAL
Table of Contents
I.
INTRODUCTION..
..................................................................................................
.2
II.
BASIC
SYSTEM
CONCEPTS..
..............................................................................
.2
A.
Analog
Film
Formats..
................................................................................
.2
B.
Digital
Film
Formats
...................................................................................
.4
C.
A-
and
B-chains
.........................................................................................
.5
D.
Evolving Dynamic Range Requirements in the Cinema..
...........................
.7
E. Integration of Loudspeakers into the Acoustical Environment
.....................
7
F.
Power
Response and
Power-Flat Systems
................................................
.9
G. Coverage
Requirements for Proper Stereo Reproduction
..........................
10
III.
ACOUSTICAL
CONSIDERATIONS
......................................................................
.12
A.
Noise
Criterion
(NC)
Requirements..
..........................................................
.12
B. Control of Reverberation and
Discrete
Reflections
....................................
.13
C.
The
Role
of the Acoustical
Consultant..
.....................................................
.15
IV.
SPECIFYING THE CORRECT LOUDSPEAKERS AND AMPLIFIERS..
...............
.15
A.
Hardware
Class vs.
Room
Size..
................................................................
.15
B.
Advantages
of
Biamplification
.....................................................................
17
C.
Cinema
Playback
Level
Calibration..
..........................................................
.17
D.
New JBL
Driver Developments
..................................................................
.18
E.
Mechanical
Details of JBL Screen
Loudspeaker Systems
.........................
.18
F.
Subwoofers
................................................................................................
.26
G.
Surround
Requirements..
...........................................................................
.29
H.
Screen
Losses..
.........................................................................................
.30
I.
Use of
Multiple
High
Frequency Elements..
.................................................
.31
V.
MOUNTING
REQUIREMENTS..
............................................................................
.31
A. General Comments
.....................................................................................
31
B.
Platform
and Baffle
Construction..
..............................................................
.31
C.
Subwoofer
Mounting..
...............................................................................
.32
D
.
Surround
Mounting
...................................................................................
.33
VI.
ELECTRICAL
INTERFACE
..................................................................................
.35
A.
Wiring
for Non-biamplified
Installations..
...................................................
.35
B.
Wiring
Diagram
for a
Biamplified Installation..
............................................
.35
C.
Wiring
for Surround
Channels..
..................................................................
.37
D.
Wire
Gauges and
Line Loss
Calculations
..................................................
.38
E.
Dividing
Network Characteristics..
..............................................................
.38
F.
System
Setup
and
Checkout..
....................................................................
.39
References..
...............................................................................................................
.41
page
1
To Next Page
Loading...
