Page 2 - Important Safety Instructions; WARNING — To reduce the risk of fire or
U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block any ventilation openings. Install in accordance w...
Page 3 - Owner’; Contents
Part No. SW0556 Rev. D 02/08 ©2007-2008 LOUD Technologies Inc. All Rights Reserved. Owner’s Manual Owner’ s Manual Need help with your new U.40 Mixer? • Visit www.mackie.com and click Support to find: FAQs, manuals, addendums, and user forums. • Email us at: [email protected].• Telephone 1-800-898...
Page 4 - Introduction; FEATURES
4 U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er Introduction Thank you for choosing a Mackie U.420 mixer. It contains all your favorite features in a ultra-compact 4-channel line mixer, along with a built-in FireWire interface, and a phono input for turntablists. The U.420 is equally at ho...
Page 5 - Getting Started; Zero the Controls; Other Nuggets of Wisdom
5 Owner’s Manual Owner’ s Manual Getting Started READ THIS PAGE!! Even if you never read manuals, please read and digest the safety instructions on page 2, and this page before you begin using your mixer. Zero the Controls 1. Unplug the mixer’s external power supply from the mixer. 2. Turn down all ...
Page 6 - Hookup Diagrams
U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er Hookup Diagrams Production studio This diagram shows a stereo synth, and a drum machine connected to channels 1 & 2, and a turntable connected to the phono inputs of channel 4. The stereo aux output sends signals to the effects/sampler, and...
Page 10 - Rear Panel Features
10 U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er Rear Panel Features 1. INSTRUMENT/LINE Input These inputs accept either 1/4" TRS balanced or TS unbalanced connectors. Unlike the other inputs, channel 1’s left input can accept direct instrument-level signals such as from guitars, witho...
Page 11 - FIREWIRE Connection
11 Owner’s Manual Owner’ s Manual If you plug a cable into the left aux output jack, and leave the right output jack empty, the right and left signals are summed together to provide a mono output. The stereo aux output from these connectors is the sum of all channels whose aux level controls [16] ar...
Page 12 - Top Panel Features; Channel Controls; INSTRUMENT SWITCH
1 U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er Top Panel Features Channel Controls 10. LEVEL SET LED These LEDs are used with the gain control [12] to set the level of the channel’s preamplifier gain just right. They light when the signal level is 0 dBu. Adjust the gain control so these L...
Page 14 - Control Section
14 U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er Control Section 18. POWER LED This will light whenever the external power supply is connected to the mixer and to a live AC mains supply. The mixer does not have a power switch, so as long as the external power supply is connected and operat...
Page 16 - Appendix A: Service Information; Bad Output; Troubleshooting; No Power; Bad Channel
1 U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er Appendix A: Service Information • If you are playing a guitar into channel 2, 3, or 4, you need to use a DI box for the correct impedance match and high frequency fidelity. • Try the same source signal in another channel, set up exactly like ...
Page 17 - Repair
17 Owner’s Manual Owner’ s Manual Repair For warranty repair or replacement, refer to the war- ranty information on page 27. Non-warranty repair for Mackie products is available at a factory-authorized service center. To locate your nearest service center, visit www.mackie.com, click “Support” and s...
Page 18 - Balanced Mono; Appendix B: Connections; RCA Plugs and Jacks; Dimensions
18 U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er 1/4" TRS Phone Plugs and Jacks “TRS” stands for Tip-Ring-Sleeve, the three connection points available on a stereo 1/4" or balanced phone jack or plug. TRS jacks and plugs are used for balanced signals and stereo headphones: Balanced...
Page 19 - Appendix C: Technical Info; Specifications
19 Owner’s Manual Owner’ s Manual Appendix C: Technical Info Input Impedance: Line input: 100 k Ω balanced Phono input: 47.5 k Ω shunt with 200 pF Maximum Output Levels: Main out: +15 dBu Aux out: +15 dBu Phones: 1.5 Vrms into 32 Ω (70 mW) Output Impedance: Main out: 120 Ω Aux out: 120 Ω Phones: 50 ...
Page 20 - Block
0 U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er Block Diagram L R Ma in L R Ma in Main O ut le ve l Le ve l Aux O ut L L R Aux L Main O ut L Ph on es le ve l NOTE: Switches are shown in the default (o ut ) p os iti on . Channels 2- 3 L R 3-Band E Q G ai n G ai n LO H I MID LO H I MID Main ...
Page 21 - System Requirements
1 Owner’s Manual Owner’ s Manual Appendix D: FireWire System Requirements These are the minimum requirements for your com- puter system to use the U.420 FireWire interface. For the PC: • Windows XP (service pack 2)• Pentium 4 or Athlon XP processor• 256 MB RAM For the Mac: • OS X (10.3.9 or higher)•...
Page 22 - Monitoring; Direct hardware monitoring; Overdubbing; Recording with FireWire
U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er The U.420’s built in FireWire connection allows over- dub style recording to a Mac or PC digital audio work-station (DAW) through the FireWire cable. Here are some steps showing how to record a first track, and then record additional tracks whi...
Page 23 - Other tips
Owner’s Manual Owner’ s Manual * In Tracktion, it is not necessary to mute the output of the track you are overdubbing on. Instead, select the input to the track (it will be highlighted in red) and dis-able the end-to-end function. You’ll hear existing tracks playing back via the FireWire in, and yo...
Page 24 - Software installation; To install the software on a PC running
4 U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er Software installation For the PC: When using the mixer with a PC, it is necessary to first install the drivers and the control panel. The con-trol panel allows you to set the sample rate and adjust the latency (delay) of the audio passing thr...
Page 26 - Macintosh OS X Audio MIDI Setup
U.40 4-Channel Line Mixer U. 4 20 4-Channel Line Mix er For the Mac: Macintosh OS X Audio MIDI Setup (version 10..9 or later): Macintosh OS X does not require FireWire drivers to be installed. OS X provides a dedicated setup utility for audio and MIDI. You can use the Audio MIDI Setup utility to cha...
Page 27 - U.420 Limited Warranty; Please keep your sales receipt in a safe place.
7 Owner’s Manual Owner’ s Manual U.420 Limited Warranty Please keep your sales receipt in a safe place. A. LOUD Technologies Inc. warrants all materials, workmanship and proper operation of this product for a period of one year from the original date of purchase. You may purchase an additional 24-mo...
