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4-Channel Line Mixer with FireWire
O W N E R ’ S M A N U A L
1 2 3 4
LEVEL LEVEL
SET SET
U U U U
GAIN GAIN
POWER
-14 +14 -14 +14 -14 +14 -14 +14
U U U U
EQ EQ
HIGH HIGH
L R
OL
KILL +10 KILL +10 KILL +10 KILL +10
10
U U U U
7
MID MID
4
0
KILL +10 KILL +10 KILL +10 KILL +10
U U 4 U U
10
LOW LOW
20
KILL +10 KILL +10 KILL +10 KILL +10
AUX AUX
MAX MAX
MAX MAX MAX MAX
FW IN PHONES
U U U U
LEVEL LEVEL
LOOP
OUT
MAX MAX MAX MAX
MAX
OO
OO OO OO OO
OO OO OO OO
OO OO
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Important Safety Instructions 12.Use only with a cart, stand, tripod, bracket, or table specified by the 1. Read these instructions. manufacturer, or sold with the apparatus. When a cart is used, use 2. Keep these instructions. caution when moving the cart/apparatus combination to avoid injury from tip-over. 3. Heed all warnings. 13.Unplug this apparatus during lightning storms or when unused for long 4. Follow all instructi
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Owner’s Manual Contents IMPORTANT SAFETY INSTRUCTIONS ........................ 2 TOP PANEL FEATURES ........................................... 12 INTRODUCTION ...................................................... 4 CHANNEL CONTROLS ..................................... 12 FEATURES ............................................................... 4 10. LEVEL SET LED ......................................... 12 GETTING STARTED ................................................... 5 11.
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FEATURES Introduction • 4 stereo line-level input channels. Thank you for choosing a Mackie U.420 mixer. It • Built-in FireWire 2x2 interface provides easy contains all your favorite features in a ultra-compact input from computer to the main mix, and easy 4-channel line mixer, along with a built-in FireWire outputs to the computer from the main mix. It interface, and a phono input for turntablists. has 24-bit resolution, and 44.1, 48, 88.2, and 96 kHz sample rates. The U.420 is equally at h
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Owner’s Manual Set the Levels Getting Started To set the gain controls, it’s not even necessary to hear what you’re doing at the outputs of the mixer. If READ THIS PAGE!! you want to listen while you work, plug headphones into the phones jack on the front panel, then set the phones Even if you never read manuals, please knob up a little. read and digest the safety instructions on page 2, and this page before you 1. Play something into the selected input. Be sure begin using your mix
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Hookup Diagrams HR824 Powered Monitors Drum machine Effects/ Sampler Headphones MAIN AUX L OUT OUT L L (MONO) L (MONO) L (MONO) 4 3 2 1 (MONO) GND PHONO L POWER 18V,1.5A R R R R R R ground wire Laptop Keyboard Turntable with phono-level out 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 the wet signal is returned into channel 3. The ma
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Owner’s Manual SRM450 Powered Speakers Guitar SRM450 Powered Drum machine Stage Monitor Headphones MAIN AUX L L L L L OUT OUT (MONO) (MONO) (MONO) (MONO) 4 3 2 1 GND PHONO L POWER 18V,1.5A R R R R R R ground wire Laptop Keyboard Turntable with phono-level out This diagram shows a guitar connected to channel 1, plus a stereo synth and drum machine connected to channels 2 & 3. A turntable is connected to the phono inputs on channel 4. Use the left aux send to connect to a Mackie SRM450 for stage
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Personal Stereo Monitors (SRM150 powered monitors) This diagram shows an acoustic Acoustic guitar connected to channel 1, plus Guitar a stereo performance synth like a Nord Lead on channel 2, a good Main Mix organ like a Korg CX-3 on chan- to front-of-house Electronic Piano nel 3, and an electronic piano on mixer channel 4 (with a dab of chanel #5 behind each ear for good measure). The main outputs are fed to the FOH (front of house) mixer for the MAIN AUX L OUT OUT L L (MONO) L (MONO)
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Owner’s Manual Digital Video Camcorder HR824 Powered Monitors Headphones MAIN AUX L L L (MONO) L (MONO) L (MONO) OUT OUT (MONO) 4 3 2 1 GND PHONO L POWER 18V,1.5A R R R R R R Video out DV Recorder 1 TM Video out iPod Docking Station Desktop computer and large display DV Recorder 2 Video Monitor This diagram shows a DV camcorder audio connected to channel 1, DVR decks connected to channels 2 and 3, and an iPod docking station connected to channel 4. The main outputs are fed to a pair of Mackie H
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Rear Panel Features MAIN AUX L L L L L OUT OUT (MONO) (MONO) (MONO) (MONO) 4 3 2 1 GND PHONO L POWER 18V,1.5A R R R R R R 1. INSTRUMENT/LINE Input . PHONO Inputs These inputs accept either 1/4" TRS balanced or TS Channel 4’s RCA jacks accept stereo phono-level unbalanced connectors. signals from turntables. Check that your turntable has a phono-level output and a moving-magnet cartridge. Unlike the other inputs, channel 1’s left input can Turntables usually have a ground wire that needs t
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Owner’s Manual If you plug a cable into the left aux output Warning: The headphone amp is designed to jack, and leave the right output jack empty, drive any standard headphones to a very loud the right and left signals are summed together level. We’re not kidding! It can cause perma- to provide a mono output. nent hearing damage. Even intermediate levels may be painfully loud with some headphones. Be careful! The stereo aux output from these connectors is the sum of all channels whose aux l
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Top Panel Features 1 2 3 4 LEVEL LEVEL SET SET U U U U GAIN GAIN POWER -14 +14 -14 +14 -14 +14 -14 +14 U U U U EQ EQ HIGH HIGH L R OL KILL +10 KILL +10 KILL +10 KILL +10 10 U U U U 7 MID MID 4 0 KILL +10 KILL +10 KILL +10 KILL +10 U U U 4 U 10 LOW LOW 20 KILL +10 KILL +10 KILL +10 KILL +10 AUX AUX MAX MAX MAX MAX MAX MAX FW IN PHONES U U U U LEVEL LEVEL LOOP OUT MAX MAX MAX MAX MAX When this switch is out, input 1 is a line-level input, Channel Controls just like inputs 2–4. You can connect
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Owner’s Manual -BAND EQ 1. AUX The U.420 has 3-band equalization at carefully These stereo controls allow you to adjust how much of selected points — low shelving at 300 Hz, mid peaking the channel signal is added to the aux bus. The aux bus at 1 kHz, and high shelving at 4 kHz. “Shelving” means contains the sum of all channels whose aux controls are that the circuitry boosts or cuts all frequencies past the set to more than minimum. specified fr equency. For example, rotating the low EQ T
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1 2 3 4 LEVEL LEVEL SET SET U U U U GAIN GAIN POWER -14 +14 -14 +14 -14 +14 -14 +14 U U U U EQ EQ HIGH HIGH L R OL KILL +10 KILL +10 KILL +10 KILL +10 10 U U U U 7 MID MID 4 0 KILL +10 KILL +10 KILL +10 KILL +10 U U U 4 U 10 LOW LOW 20 KILL +10 KILL +10 KILL +10 KILL +10 AUX AUX MAX MAX MAX MAX MAX MAX FW IN PHONES U U U U LEVEL LEVEL LOOP OUT MAX MAX MAX MAX MAX Control Section 18. POWER LED 0. FW IN This will light whenever the external power supply is This control lets you adjust the signa
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Owner’s Manual 1. FW LOOP OUT . MAIN LEVEL In addition to a mix of channels 1 to 4, the FireWire This big handy knob adjusts the main mix output level output to the computer can contain any FireWire input, at the main outputs [6]. Use it wisely to turn up the if this switch is down. (The mains and phones are not tunes in your main speakers, or to turn it down when- affected by the switch, and always provide a full mix of ever you think the room could benefit from a little less 1 2 3 4 chan
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Appendix A: Service Information If you think your U.420 has a problem, please check • If you are playing a guitar into channel 2, 3, or 4, out the following troubleshooting tips and do your best you need to use a DI box for the correct impedance to confirm the problem. Visit the Support section of our match and high frequency fidelity. website (www.mackie.com/support) where you will find • Try the same source signal in another channel, set lots of useful information such as FAQs, document
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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 select “Locate a Service Center.” Service for Mackie products living outside the United States can be obtained through local dealers or distributors. If you do not have access to our website, you can call our Tech
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Appendix B: Connections 1/4" TRS Phone Plugs and Jacks RCA Plugs and Jacks “TRS” stands for Tip-Ring-Sleeve, the three connection RCA-type plugs (also known as phono plugs) and jacks points available on a stereo 1/4" or balanced phone are often used in home stereo and video equipment and jack or plug. TRS jacks and plugs are used for balanced in many other applications. They are unbalanced and signals and stereo headphones: electrically equivalent to a 1/4" TS phone plug. SLEEVE TIP
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Owner’s Manual Appendix C: Technical Info Specifications Frequency Response (0 Hz to 0 kHz, unity gain) : Input Impedance: Line input to any output: +0/–0.5 dB Line input: 100 k Ω balanced Phono input to any output: ±0.5 dB of RIAA EQ Phono input: 47.5 k Ω shunt with 200 pF curve Maximum Output Levels: FireWire output to FireWire input Main out: +15 dBu (with loop out switch engaged): +0/–0.5 dB Aux out: +15 dBu Distortion (THD+N): Phones: 1.5 Vrms into 32 Ω (70 mW
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0 U.40 4-Channel Line Mixer U.420 4-Channel Line Mixer Block Diagram Main Out level Channel Main Mix Sum Sum Level Set Main Out L Level L Normal Main Out L Channel 1 3-Band EQ HI-Z LO MID HI L R R HI–Z Level Gain LO MID HI R Phones Main Out R level Aux Level Set FireWire In Phones from Computer Channels 2-3 3-Band EQ Firewire FireWire Out LO MID HI Sum to Computer ADC DAC L L L Gain Level LO MID HI Firewire R In Level R R Ch.1-4 to FW output FireWire input and Ch.1-4 to FW output Aux Out L L
