Crown CH4 Instruction Manual download pdf (Page 4)

Operation Manual

CH and CL Series Power Amplifiers

page 4

Table of Contents

Important Safety Instructions .......................................................2

Declaration of Conformity ............................................................3

1 Welcome ..................................................... 5

1.1 Features ...........................................................................5

1.2 How to Use This Manual ..................................................5

2 Setup ......................................................... 6

2.1 Unpack Your Amplifier .....................................................6

2.2 Install Your Amplifier .......................................................6

2.3 Ensure Proper Cooling ....................................................6

2.4 Choose Input Wire and Connectors .................................7

2.5 Choose Output Wire and Connectors ...............................7

2.6 Switch Settings ................................................................8

2.7 Wire Your System ............................................................9

2.7.1 Models CH1 & CH2 Stereo Mode............................9

2.7.2 Models CH1 & CH2 140V Bridge Mode .................9

2.7.3 Model CH4 Stereo Mode ........................................10

2.7.4 Model CH4 Bridge Mode ........................................10

. 2.7.5 Models CL1 & CL2 Stereo Mode ............................11

2.7.6 Models CL1 & CL2 Bridge Mode ...........................11

. 2.7.7 Model CL4 Stereo Mode .........................................12

2.7.8 Model CL4 Bridge Mode ........................................12

2.7.9 All Models: How to Parallel the Inputs

in Stereo Mode........................................................13

2.8 Connect to AC Mains .......................................................13

2.9 Startup Procedure ............................................................13

3 Operation .................................................... 14

3.1 Precautions ......................................................................14

3.2 Indicators .........................................................................18

3.3 Controls ...........................................................................18

4 Advanced Features and Options .............................. 19

4.1 Protection Systems ..................................................................19

4.1.1 Power Circuit Breaker .....................................................19

4.1.2 Proportional-speed or 3-speed Fan ................................19

4.2 Advanced Features ..................................................................19

4.2.1 BCA

(CH4 and CL4 Only) .............................................19

4.2.2 Switching Power Supply with PFC (CH4 and CL4 Only) .19

4.3 Options .....................................................................................19

4.3.1 Input Sensitivity ...............................................................19

4.3.2 Crown SST Modules .......................................................19

4.3.3 Fault Monitoring ..............................................................21

4.3.4 Precision Detented Level Controls ...................................22

5 Principles of Operation ........................................ 23

5.1 CH1, CH2, CL1 and CL2 .........................................................23

5.2 CH4 and CL4 ...........................................................................25

5.2.1 Audio Signal Path ...........................................................25

5.2.2 Power Supply Operation .................................................27

6 Troubleshooting ................................................. 28

7 Specifications ................................................... 29

8 AC Power Draw and Thermal Dissipation ................... 34

9 Service ............................................................ 38

9.1 International and Canada Service ............................................38

9.2 US Service ...............................................................................38

9.2.1 Service at a US Service Center........................................38

9.2.2 Factory Service ...............................................................38

9.2.3 Factory Service Shipping Instructions: ...........................38

9.2.4 Packing Instructions........................................................38

9.2.5 Estimate Approval............................................................38

9.2.6 Payment of Non-Warranty Repairs...................................38

10 Warranty ......................................................... 39

Crown Factory Service Information Form ............................................41

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Crown CH4 Instruction Manual Page 4

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