JBL Cinema 300 - Table of Contents

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-at 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 Reections ................................................. 11
C. The Role of the Acoustical Consultant ...................................................................12
IV. Specifying the Correct Loudspeakers and Ampliers .......................................................... 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
®
Certied 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 Ampliers .............................44
XI. References and Additional Reading .................................................................................... 44