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Owner’s Manual
Owner’
s Manual
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Table of Contents
IMPORTANT SAFETY INSTRUCTIONS ........................ 2
INTRODUCTION ...................................................... 4
GETTING STARTED ................................................... 5
HOOKUP DIAGRAMS............................................... 6
REAR PANEL FEATURES ......................................... 11
1. MIC/LINE INPUT ....................................... 11
2. LINE INPUTS .............................................. 11
3. PHONO INPUTS ......................................... 11
4. GND TERMINAL ......................................... 11
5. AUX OUTPUTS ........................................... 12
6. MAIN OUTS ............................................... 12
7. HEADPHONES OUTPUT .............................. 12
8. DC INPUT .................................................. 12
9. FIREWIRE CONNECTION ............................. 13
TOP PANEL FEATURES ........................................... 14
CHANNEL 1 AND 2 CONTROLS ....................... 14
10. LEVEL SET LED ......................................... 14
11. INSTRUMENT SWITCH ............................. 14
12. GAIN ...................................................... 14
3-BAND EQ ................................................... 14
13. HIGH EQ ................................................. 15
14. MID EQ ................................................... 15
15. MID FREQ ............................................... 15
16. LOW EQ .................................................. 15
17. AUX ........................................................ 15
18. CUE......................................................... 15
19. FADERS ................................................... 15
CHANNEL 3 AND 4 CONTROLS ....................... 16
20. GAIN ...................................................... 16
21. HIGH EQ ................................................. 16
22. MID EQ ................................................... 16
23. LOW EQ .................................................. 16
24. AUX ........................................................ 17
25. LEVEL ...................................................... 17
26. CURVE .................................................... 17
27. CROSSFADER ........................................... 17
CONTROL SECTION ........................................ 18
28. POWER LED ............................................. 18
29. 48V LED .................................................. 18
30. METERS .................................................. 18
31. CUE LED .................................................. 18
32. 48V ........................................................ 18
33. FW IN ..................................................... 18
34. FW LOOP OUT ......................................... 19
35. PHONES LEVEL ........................................ 19
36. MAIN LEVEL ............................................ 19
APPENDIX A: SERVICE INFORMATION .................... 20
APPENDIX B: CONNECTIONS.................................. 22
APPENDIX C: TECHNICAL INFO............................... 23
APPENDIX D: FIREWIRE ........................................ 25
SOFTWARE INSTALLATION ............................... 28
U.420d LIMITED WARRANTY ................................. 31
Part No. SW0557 Rev. E 03/12
©2007-2012 LOUD Technologies Inc. All Rights Reserved.
