2
JBL 2003 Cinema Sound System Manual
Table of Contents:
I.
Introduction ..........................................................................................................................3
II.
Basic Systems Concepts .....................................................................................................3
A. Analog Film Formats ..............................................................................................3
B. Digital Film Formats ................................................................................................5
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 ..............................................................7
G. Coverage Requirements for Proper Stereo Reproduction ......................................8
III.
Acoustical Considerations ...................................................................................................10
A. Noise Criterion (NC) Requirements ........................................................................10
B. Control of Reverberation and Discrete Reflections .................................................11
C. The Role of the Acoustical Consultant ...................................................................12
IV.
Specifying the Correct Loudspeakers and Amplifiers ..........................................................12
A. Hardware Class vs. Room Size ..............................................................................12
B. Cinema Playback Level Calibration ........................................................................14
C. JBL Driver Developments .......................................................................................14
D. Mechanical Details of JBL Screen Channel Loudspeakers ....................................17
E. Subwoofers .............................................................................................................17
F. Surround Requirements .........................................................................................18
G. Screen Losses ........................................................................................................19
H. JBL ScreenArray
®
Loudspeaker Systems ...............................................................19
V. Mounting Requirements .......................................................................................................21
A. General Comments ................................................................................................21
B. Screen Loudspeaker Aiming ..................................................................................22
C. Subwoofer Mounting ...............................................................................................22
D. Surround Mounting .................................................................................................22
VI. Electrical Interface ..............................................................................................................23
A. JBL Polarity Conventions ........................................................................................23
B. Wiring Diagrams for 3000 Series Screen Systems .................................................24
C. Wiring Diagrams for 4000 Series Screen Systems .................................................24
D. Wiring Diagrams for 5000 Series Screen Systems .................................................25
E. Wiring Diagrams for ScreenArray Systems ............................................................26
F. Surround Wiring Diagrams .....................................................................................27
G. Subwoofers .............................................................................................................29
H. Wire Gauges and Line Losses ...............................................................................29
I. System Setup and Checkout ..................................................................................29
VII.
Summary of Recommendations for Selecting and Installing
Theater Loudspeaker Systems .............................................................................31
A. Specifying and Installing Screen Channels ...............................................................31
B. Specifying and Installing Surround Channels ...........................................................32
C. Specifying and Installing Subwoofers .......................................................................33
VIII. Listing of THX
®
Certified JBL Products ..........................................................................34
A. Screen Systems ........................................................................................................34
B. Subwoofers ...............................................................................................................34
C. Surround Systems ....................................................................................................34
IX. Loudspeaker Signal Processing Settings for JBL DSC260A
Digital System Controller .........................................................................................35
X. Cross-Reference of JBL Cinema Speakers to Crown Power Amplifiers .............................44
XI. References and Additional Reading ....................................................................................44
