QSC CX Series User Manual

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

QSC CX Series Specifications

General

Power Output (8 ohms)	Varies by model
Power Output (4 ohms)	Varies by model
Power Output	Varies by model (CX168, CX254, CX302, CX404, CX602, CX902, CX1102, CX1202, CX1602)
Signal to Noise Ratio	>100 dB
Damping Factor	>200
Cooling	Variable-speed fan
Dimensions	Varies by model
Weight	Varies by model
Channels	2
Load Impedance	4Ω, 8Ω
Protection	Thermal, short circuit, DC offset, ultrasonic