Table of Contents
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1 CONTENTS
1 CONTENTS ................................................................................................................................... 2
2 APPROVALS ................................................................................................................................. 4
3 WARNINGS .................................................................................................................................. 4
3.1 Explanation of graphical symbols .................................................................................................... 4
3.1.1 WARNING ......................................................................................................................................... 4
3.1.2 CAUTION .......................................................................................................................................... 4
3.2 Important safety instructions ........................................................................................................... 4
3.3 User responsibility ............................................................................................................................. 5
3.3.1 Mains connection grounding (earthing) ........................................................................................ 5
3.3.2 Speaker output hazard ................................................................................................................... 5
3.3.3 Radio interference. ......................................................................................................................... 5
3.3.4 Speaker damage ............................................................................................................................. 5
3.3.5 Maintenance ................................................................................................................................... 5
4 WELCOME .................................................................................................................................... 6
4.1 Introduction ........................................................................................................................................ 6
4.2 Main features ..................................................................................................................................... 6
4.2.1 Class TD amplifier and Regulated Switch Mode Power Supply (R.SMPS) .................................. 6
4.2.2 Amplifier gain structure .................................................................................................................. 6
4.2.3 Voltage Peak Limiter (VPL) ............................................................................................................. 6
4.2.4 Protection and performance optimization .................................................................................... 6
4.2.5 2Ω load overheat protection .......................................................................................................... 7
5 INSTALLATION ............................................................................................................................. 7
5.1 Unpacking .......................................................................................................................................... 7
5.2 Mounting ............................................................................................................................................ 8
5.2.1 Rear support bracket ...................................................................................................................... 8
5.3 Cooling ............................................................................................................................................... 8
5.3.1 Rack installation ............................................................................................................................. 9
5.3.2 Ventilation ....................................................................................................................................... 9
5.4 Operating voltage .............................................................................................................................. 9
5.5 Grounding (earthing) ....................................................................................................................... 10
6 QUICK GUIDE OVERVIEW ......................................................................................................... 10
6.1 Front panel overview ....................................................................................................................... 10
6.1.1 Front ............................................................................................................................................... 11
6.2 Rear panel overview ........................................................................................................................ 11
6.2.1 Configuration section .................................................................................................................... 12
6.2.2 The DIP-switch features ................................................................................................................ 13
6.2.3 Input and output connectors ........................................................................................................ 13
7 OPERATION AND PERFORMANCE .......................................................................................... 13
7.1 Introduction ...................................................................................................................................... 13
7.2 Operation precautions .................................................................................................................... 14
7.3 Signal flow and headroom .............................................................................................................. 14
7.3.1 Signal flow block diagram ............................................................................................................ 14
7.3.2 Headroom, sensitivity and VPL/Gain settings ............................................................................ 14
7.4 Audio input and output .................................................................................................................... 15
7.4.1 Balanced input connections ........................................................................................................ 15
7.4.2 Unbalanced input connections .................................................................................................... 16
7.4.3 SpeakON output connections ...................................................................................................... 16
7.4.4 Output bridge mode ...................................................................................................................... 17
Zenith 13K2 Amplifier Manual
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