Operation Manual
I-Tech HD DriveCore Series
Power Amplifiers
page 4
Table of Contents
Important Safety Instructions ............................................................2
Declaration of Conformity ..................................................................3
Table of Contents ...............................................................................4
1 Welcome ........................................................5
1.1 Features .................................................................................5
1.2 How to Use This Manual .........................................................5
2 Setup .............................................................6
2.1 Unpack and Install Your Amplifier ..........................................6
2.2 Connecting to AC Mains ........................................................7
2.3 Wire Inputs and Outputs .........................................................7
3 HARMAN greenedge - going ‘green’ ........................11
3.1 going ‘green’ ..........................................................................11
3.2 The Sound of Efficiency ..........................................................11
3.3 green Savings ........................................................................11
4 integraded drivecore
TM
Technology ..........................12
5 Powered by crown ..............................................13
6 Operation ........................................................14
6.1 Protecting Your Speakers .......................................................14
6.2 Startup Procedure ..................................................................14
6.3 Precautions ............................................................................14
6.4 Front Panel Controls and Indicators ........................................15
6.5 Back Panel Controls, Indicators and Connectors .....................16
7 Advanced Operation ............................................17
7.1 Introduction ............................................................................17
7.2 Operation Example ..................................................................18
7.3 Presets ................................................................................... 27
7.4 List of Pop-Up and Descriptions ............................................. 28
7.5 Digital Audio Options (AES3 and VDrive) ................................ 29
7.6 Networking the Amplifier ......................................................... 29
7.7 Software- Controllable Onboard DSI ....................................... 29
8 Troubleshooting ................................................44
9 Specifications ...................................................46
10 Ac Power draw and Thermal dissipation ..................50
11 Advanced Features ............................................51
11.1 Protection Systems ............................................................... 51
11.2 global Switching Power Supply with PFC ............................. 51
11.3 6th generation Class I Circuitry ............................................ 51
11.4 Color-Coded Rear Overlay .................................................... 51
12 Appendix A: Network and cobraNet Basics ................52
12.1 HiQnet Networks ................................................................... 52
12.2 A Closer Look at CobraNet .................................................... 52
13 LevelMAX
TM
Limiter Suite ....................................56
14 LevelMAX Limiters ............................................57
14.1 LevelMAX Peak Limiter ......................................................... 57
14.2 Peak Limiter Threshold (Vpk) ................................................ 57
14.3 Peak Limiter Attach (sec)....................................................... 57
14.4 Peak Limiter Release (sec) .................................................... 57
14.5 Peak Limiter Look Ahead....................................................... 57
14.6 Level MAX RMS Limiter ........................................................ 57
14.7 RMS Threshold (VRMS) ....................................................... 57
14.8 LevelMAX Tranducer Thermal Limiters .................................. 57
14.9 Thermal Voltage (VRMS) ...................................................... 57
14.10 Thermal Response Time (s) ................................................. 57
15 Appendix B: Table of Parameters Modified by each Mode
with LevelMAX ....................................................58
16 Application of FiR Filters to Loudspeakers crossovers ..60
16.1 FIR Overview......................................................................... 60
16.2 What are IIR Filters and FIR Filters? ....................................... 60
16.3 Pros and Cons of IIR and FIR Filters ...................................... 60
16.4 Desirable Attributes of FIR Filters .......................................... 60
16.5 High Rolloff and Steep Slopes ............................................... 61
16.6 Stop-band Attenuation .......................................................... 61
16.7 FIR Polar Lobing Eror............................................................ 61
16.8 Crown’s Implementation of FIR Filters ................................... 61
16.9 FFT Convolution ................................................................... 61
16.10 Filter Design ....................................................................... 61
16.11 Low Latency 96 kHz Studio Quality Filters ........................... 62
16.12 Measurements of Two-way Loudspeaker System................. 62
16.13 FIR Measurements .............................................................. 64
16.14 Conclusions ....................................................................... 65
17 Service ..........................................................66
17.1 International and Canada Service .......................................... 66
17.2 US Service ............................................................................ 66
18 Warranty ........................................................67
Summary of Contents for DriveCore I-Tech 4x3500B HD
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