QSC CX Series

1
Table of Contents
PART 1—CX SERIES USER MANUAL
I. Warning Notices ....................................................................................................................................... 2
Speaker Damage............................................................................................................................................ 3
Speaker Output Shock Hazard.......................................................................................................................3
Rack Mounting Precautions........................................................................................................................... 3
II. Overall Description ................................................................................................................................... 4
III. Inputs............................................................................................................................................................ 6
Input Sensitivities.......................................................................................................................................... 6
IV. Outputs ......................................................................................................................................................... 6
V. Controls & Displays...................................................................................................................................8
VI. Operation ..................................................................................................................................................... 8
AC Power ....................................................................................................................................................... 8
Operation ....................................................................................................................................................... 8
Troubleshooting .............................................................................................................................................9
Open Input Architecture
™
Level I.................................................................................................................10
Parallel, Stereo, or Bridged Operation ....................................................................................................... 11
Maximum Long-Term Output Power ...........................................................................................................13
AC Current Consumption............................................................................................................................. 13
Heat Emissions............................................................................................................................................. 14
Protection Circuits ....................................................................................................................................... 15
VII. Specifications.......................................................................................................................................... 16
PART 2—CX APPLICATION GUIDE..................................................................................19
VIII.Distributed Lines ..................................................................................................................................... 19
IX. Designing the Distributed Sound System.......................................................................................... 20
Loudspeaker Coverage and Placement....................................................................................................... 20
Determining Power Levels........................................................................................................................... 22
Selecting the Amplifier ............................................................................................................................... 23
Using Components with Different Voltages............................................................................................... 24
X. How Many Speakers? ............................................................................................................................. 25
XI. Other Design Considerations................................................................................................................ 26
Speaker Transformer Saturation ................................................................................................................ 26
Connecting Both a Distributed Line and a Direct Loudspeaker on One Channel......................................26
Wire Loss ..................................................................................................................................................... 27
AC Current Consumption............................................................................................................................. 29
Heat Emissions............................................................................................................................................. 29
XII. Address & Telephone Information ...................................................................................................... 30