Part No. SW0556 Rev. E 03/12
©2007-2012 LOUD Technologies Inc. All Rights Reserved.
3
Owner’s Manual
Owner’
s Manual
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Contents
IMPORTANT SAFETY INSTRUCTIONS ........................ 2
INTRODUCTION ...................................................... 4
FEATURES ............................................................... 4
GETTING STARTED ................................................... 5
HOOKUP DIAGRAMS............................................... 6
REAR PANEL FEATURES ......................................... 10
1. INSTRUMENT/LINE INPUT ......................... 10
2. LINE INPUTS .............................................. 10
3. PHONO INPUTS ......................................... 10
4. GND TERMINAL ......................................... 10
5. AUX OUTPUTS ........................................... 10
6. MAIN OUTS ............................................... 11
7. HEADPHONES OUTPUT .............................. 11
8. DC INPUT .................................................. 11
9. FIREWIRE CONNECTION ............................. 11
TOP PANEL FEATURES ........................................... 12
CHANNEL CONTROLS ..................................... 12
10. LEVEL SET LED ......................................... 12
11. INSTRUMENT SWITCH ............................. 12
12. GAIN ...................................................... 12
3-BAND EQ ................................................... 13
13. HIGH EQ ................................................. 13
14. MID EQ ................................................... 13
15. LOW EQ .................................................. 13
16. AUX ........................................................ 13
17. LEVEL ...................................................... 13
CONTROL SECTION ........................................ 14
18. POWER LED ............................................. 14
19. METERS .................................................. 14
20. FW IN ..................................................... 14
21. FW LOOP OUT ......................................... 14
22. PHONES LEVEL ........................................ 15
23. MAIN LEVEL ............................................ 15
24. FAIRY DUST ............................................. 15
APPENDIX A: SERVICE INFORMATION .................... 16
APPENDIX B: CONNECTIONS.................................. 18
APPENDIX C: TECHNICAL INFO............................... 19
APPENDIX D: FIREWIRE ........................................ 21
SOFTWARE INSTALLATION ..................................... 24
U.420 LIMITED WARRANTY................................... 27
