5
MULTIGATE PRO XR4400
TABLE OF CONTENT
1. INTRODUCTION.....................................................................................................................6
1.1 Technical background...................................................................................................................... 7
1.1.1 Noise as a physical phenomenon ......................................................................................... 7
1.1.2 What are audio dynamics? ...................................................................................................7
1.1.3 Compressors/limiters............................................................................................................ 8
1.1.4 Expanders/noise gates......................................................................................................... 9
2. THE DESIGN CONCEPT .......................................................................................................9
2.1 High quality components and design............................................................................................... 9
2.2 Inputs and outputs........................................................................................................................ 10
2.2.1 Balanced inputs and outputs............................................................................................... 10
3. INSTALLATION ..................................................................................................................... 10
3.1 Rack mounting.............................................................................................................................. 10
3.2 Mains voltage................................................................................................................................10
3.3 Audio connections........................................................................................................................ 10
4. CONTROLS ..........................................................................................................................12
4.1 The front panel control elements ................................................................................................... 12
4.2 The rear panel elements................................................................................................................ 13
5. TECHNICAL BACKGROUND ..............................................................................................14
5.1 EXPANDER mode......................................................................................................................... 14
5.2 Interactive control functions........................................................................................................... 14
5.2.1 THRESHOLD control .......................................................................................................... 14
5.2.2 Attack, release and hold times........................................................................................... 15
5.2.3 IAC circuit (Interactive Attack Control)................................................................................. 15
5.2.4 RANGE function ................................................................................................................. 15
5.2.5 IRC circuit (Interactive Ratio Control)................................................................................... 16
5.2.6 RATIO function.................................................................................................................... 16
5.3 FLEXLINK function........................................................................................................................ 16
5.4 The SIDECHAIN filter.................................................................................................................... 17
5.4.1 The MONITOR function ....................................................................................................... 17
6. APPLICATIONS .....................................................................................................................17
6.1 Basic setting................................................................................................................................. 17
6.1.1 The gate function................................................................................................................ 17
6.1.2 The expander function......................................................................................................... 19
6.2 Proper positioning of microphones................................................................................................ 19
6.3 Applications .................................................................................................................................. 19
6.3.1 Suppressing crosstalk in multi-track applications................................................................ 19
6.3.2 Reducing crosstalk in stage microphones........................................................................... 20
6.3.3 Reducing feedback in stage microphones........................................................................... 20
7. SPECIFICATIONS.................................................................................................................. 21
8. WARRANTY ...........................................................................................................................22