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This manual does not include all of the details of design, production, or variation of the equipment. Nor does it

cover every possible situation which may arise during installation, operation or maintenance.

The information provided in this manual was deemed accurate as of the publication date. However, updates to

this information may have occured.

Trademark Notice: JBL is registered trademark of JBL International. Other trademarks are the property of their

respective owners.

Contents

Important Safety Instructions .......................................................................... 3

JBL DECLARATION OF CONFORMITY .......................................................... 5

1.0 Welcome ................................................................................................... 7

1.1 Features ................................................................................................. 7

1.2 Front Control Panels and Indicators ...................................................... 8

1.3 Rear Panel Controls and Connectors - Four Channel............................ 9

1.4 Rear Panel Controls and Connectors - Eight Channel............................10

2.0 Setup ........................................................................................................12

2.1 Unpacking Your Ampliﬁer ......................................................................12

2.2 Installing Your Ampliﬁer .........................................................................12

2.3 Ensuring Proper Cooling .......................................................................17

2.4 Choosing Input Wire and Connectors ...................................................17

2.5 Output Wiring and Connectors .............................................................18

2.6 Wiring Your Audio System .....................................................................19

2.7 Connecting to AC Mains .....................................................................20

2.8 Protecting Your Speakers .....................................................................20

2.9 Startup Procedure .................................................................................20

3.0 Operation ..................................................................................................21

3.1 Precautions ............................................................................................21

3.2 Input Routing..........................................................................................22

3.3 High-Z Switch .........................................................................................22

3.4 Phantom Power ......................................................................................22

3.5 VOX Ducking ..........................................................................................22

3.6 Priority Muting ........................................................................................23

3.7 Remote Volume Control .........................................................................23

3.8 Sleep Mode ............................................................................................23

3.9 AUX Output ............................................................................................23

4.0 Troubleshooting ........................................................................................24

Appendix A: Target Performance Speciﬁcations ............................................25

Appendix B: Block Diagram ...........................................................................26

Appendix C: Contact Information ....................................................................28

JBL CSMA 1120 User Manual

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