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User's Manual
AMX-120 12-CHANNEL MIXING CONSOLE
R
LTO
www.altoproaudio.com
Version 1.4 Septemper 2005
English
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Fuse SAFETY RELATED SYMBOLS To prevent fire and damage to the product, use only the recommended fuse type as indicated in this CAUTION manual. Do not short-circuit the fuse holder. Before RISK OF ELECTRIC SHOCK DO NOT OPEN replacing the fuse, make sure that the product is OFF and disconnected from the AC outlet. This symbol, wherever used, alerts you to the pre- Protective Ground sence of un-insulated and dangerous voltages with- in the product enclosure. These are voltages that Before turning t
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PREFACE Dear Customer: Thank you for choosing the LTO AMX-120 12-Channel Mixing Console, which is the result of our LTO AUDIO TEAM's endeavours. For the LTO AUDIO TEAM, music and audio are more than a profession, it is a passion and an obsession! We have, in fact, been designing professional audio products for a number of years in cooperation with many of the world's major brands. The LTO line represents unparalleled analogue and digital products made by musicians, for musicians. With our design
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TABLE OF CONTENTS 1.INTRODUCTION...................................................................................................................................................4 2.FEATURES...........................................................................................................................................................5 3.READY TO START?.......................................................................................................................................
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1. INTRODUCTION Thank you very much for expressing your confidence in LTO products by purchasing LTO AMX-120 mixing console. The AMX-120 is a professional compact mixer. You will get the smooth, accurate more natural and open sound from this apparatus, and it is really ideal for small gigs, recording and fixed PA installations. The AMX-120 mixing console is packed with some key features that can not be found in other consoles of its size: 2 mono input channels (these are provided with ultra low
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2. FEATURES The AMX-120 12-Channel Mixing Console is designed for professional application. It will provide the following features: 2 MIC input channels with gold plated XLRs and balanced LINE input 8 stereo input channels with balanced TRS jacks Ultra-low noise discrete MIC pre-amps with +48V phantom power Extremely high headroom offering more dynamic range Switch-able low cut filter on each mono channel Warm, natural 3-band EQ on each mono channel Peak LED on each mono channel +4dB / -10dB gai
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3. READY TO START? 3.1 Please check the AC voltage available in your country before connecting your AMX-120 to the AC socket. 3.2 Be sure that the main power switch is turned off before connecting the mixer to the AC socket. Also, you should make sure that all Input and output controls are turned down. This will avoid damages to your speakers and avoid excessive noise. 3.3 Before turning on the AMX-120 you shall connect it to a power amplifier and turn-on the mixer BEFORE the power amplifier. On
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4. CONTROL ELEMENTS R MIC 1 MIC 2 LTO -120 12-CHANNEL MIXING CONSOLE AM J.T J.T.. J.T J.T.. AUX SENDS MAIN MIX OUTPUT 2 1 2 1 PHONES LEFT RIGHT 3 3 CTRL ROOM OUTPUT L R BAL BAL OR OR BAL BAL OR OR UNBAL UNBAL UNBAL UNBAL LINE IN 3/4 LINE IN 5/6 LINE IN 7/8 LINE IN 9/10 2-TRACK IN/OUT LINE IN 1 LINE IN 2 L TRIM TRIM LEFT (MONO) LEFT (MONO) LEFT (MONO) LEFT (MONO) R +15dB -30dB LINE +15dB -30dB LINE 0dB 44dB MIC 0dB 44dB MIC TAPE IN TAPE OUT RIGHT RIGHT RIGHT RIGHT 0 0 0 0 EQ EQ AUX AUX POST POST
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4.1 MONO MIC/LINE Channels 1 These are channel 1 through channel 2. You can connect balanced, low impe- MIC 1 dance microphones to the XLR socket. On the 1/4" jack you can connect either J.T J.T.. a microphone or a line level instrument. You shall never connect an unbalanced 2 1 3 microphone to the XLR socket if you do not want to damage both the micro- phone and the mixer. 1 BAL BAL OR OR 48 Volt phantom power 2 UNBAL UNBAL LINE IN 1 It is available only to the XLR Mic sockets. Never plug in a
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LOW 7 This is the Bass control. Boost male voice or kickdrum and bass guitar. Your system will sound much bigger than what it is. The gain range goes from -15dB to +15dB and the center frequency is 80 Hz. -. AUX SEND Control 8 This control is used to adjust the level of the signal sent to AUX buses, and their adjustable range goes from - to +15dB. The AUX send is configured as POST-FADER, therefore, most of the times, it will be used for effects and processors input, however, you can also change
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-. +4dBu/-10dBV Switch 14 Your AMX-120 provides the gain select switch, which is used to adjust the sensitivity of line input on stereo channels. Line level are considered to be between 1V and 2V RMS (+2dBu ~ +8dBu) in professional equipment, peak levels may extend to over 10V RMS (+22dBu). The accepted standard for sound reinforcement equipment is +4dBu. Unfortunately, many low budget components fall short of these levels, so we need to "baby" their level, and find an- other source for the sign
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-. PHONES/CTRL ROOM Control 23 This control sets the amount of signal sent to the control room and headphone. 4.4 CTRL ROOM OUTPUT Connectors 24 These 1/4" sockets are used to send the control room signal to the studio monitor speakers or a second set of PA. CTRL ROOM OUTPUT L R 24 2-TRACK IN/OUT L 4.5 2TK IN/OUT Connectors 25 25 -. TAPE IN R Use the tape input if you wish to listen to your mix from a taper recorder or DAT. You can assign the signal coming from the taper TAPE IN TAPE OUT recorde
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4.9 REAR PANEL Description ON CAUTION RISK OF ELECTRIC SHOCK MODEL DO NOT OPEN WARNING: SHOCK HAZARD - DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR 18VAC~ OFF SERIAL POWER PHANTOM RATED POWER CONSUMPTION: 11W 29 2 30 - POWER ON/OFF Switch 29 This switch is used to turn the main power ON and OFF. - PHANTOM ON/OFF Switch 2 This switch will apply +48 Volt Phantom Power only to the 2 XLR microphone inputs. Never connect microphones when the phantom power is on already. - AC INPUT Conn
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5. INSTALLATION AND CONNECTION Ok, you have got to this point you are now in the position to successfully operate your AMX-120. However, we advise you to read carefully the following section to be the real master of your own mix. Not paying attention enough to the Input signal level, to the routing of the signal and the assignment of the signal will result in unwanted distortion, a corrupted signal or no sound at all. So you should follow this procedure for every single channel: Turn down all In
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1 2 1 2 1 2 1 2 1 2 3 3 3 3 3 5.1 Audio Connection Both XLR and 1/4 " TRS connectors are available on the unit. In this way you can interface the unit in several different ways without experiencing any noise or signal loss. You can use the unit with single instruments using The mixer's main insert or on "in-line" between a mixing console's output and a power amplifier. - Wiring Configuration Either the 1/4" TRS phone jack or XLR connector can be wired in balanced and unbalanced modes, which will
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6. FOR THE EXPERTS WHO WANT TO KNOW MORE As we have told you previously in this manual, the AUX SEND control both on mono and on stereo channels is factory wired as POST-FADER. If you have some skill in electronic components soldering you can modify this setting and have all your AUX SENDS configured as PRE-FADER. AUX AUX (PRE) (PRE) Solder the PRE route Disconnect POST POST the POST route Before After Modification on mono and stereo channels 15
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- + 7. BLOCK DIAGRAMS 16 1 2 3 4 5 6 7 8 MONOINPUT CHANNELS (1-2) GAIN LO MID HI PHANTOM POWER D D +48V LEVEL PAN 2 80 2.5K 12K 3 MICIN 3-BANDEQ AUXSEND 1 R T S AUX SEND1 LINEIN MAIN MIX MAINOUT LEVEL POST R 1 2 AUX1 T SG/OL S PRE 1 2 MAIN MIX LEFT MIC GAIN:0~60dB LINE IN TRIM:+15dB~-45dB STEREO INPUT CHANNELS (3-10) LEVEL BALANCE R 3c R T 4d RN - S 2b TN 1a T MAIN MIX RIGHT C + C 5e S LEFT(MONO) 3c R 4d RN 2TK IN - 2TK TO MIX 2b TN LEVEL 1a 1 T + 2 5e S 3 2-TRACK RIGHT 1 TAPE IN TAPE OUT 2 3 LE
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8. TECHNICAL SPECIFICATION Mono input channels Microphone input electronically balanced, discrete input configuration Frequency response 10Hz to 55kHz, + 3dB Distortion (THD & N) 0.005% at +4dBu, 1kHz Gain range 0dB to 44dB (MIC) SNR (Signal to Noise Ratio) 115dB Line input electronically balanced Frequency response 10Hz to 55kHz, + 3dB Distortion (THD & N) 0.005% at +4dBu, 1kHz Sensitivity range +15dBu to 30dBu Stereo input channels Line input Balanced Frequency response 10Hz to 55kHz, 3dB + Di
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9. WARRANTY 1. WARRANTY REGISTRATION CARD To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date. All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport a more effective and efficient after-sales warranty service. Please fill out all the information carefully and genuinely, miswriting or absence of this card will
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SEIKAKU TECHNICAL GROUP LIMITED No. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan http://www.altoproaudio.com Tel: 886-4-22313737 email: alto@altoproaudio.com Fax: 886-4-22346757 All rights reserved to ALTO. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this c manual without written permission is forbidden. Copyright 2005 SEIKAKU GROUP NF01656-1.4
