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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