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Alto AMX-120 - page 1
12- CHANNEL MIXING CONSOLE AMX -120 User's Manual LTO R www .altoproaudio.com V ersion 1.4 Septemper 2005 English ...
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Alto AMX-120 - page 2
SAFETY RELA TED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol, wherever used, alerts you to the pre- sence of un-insulated and dangerous voltages with- in the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death. Protective Ground T erminal AC mains (Alternating Current) Haz ...
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Alto AMX-120 - page 3
2 Thank you very much L T O AUDIO TEAM PREF ACE Dear Customer: For the L T O 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 L T O line represents unparalleled an ...
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Alto AMX-120 - page 4
3 T ABLE OF CONTENTS 1.INTRODUCTION...................................................................................................................................................4 2.FEA TURES........................................................................................................................................................... ...
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Alto AMX-120 - page 5
4 1. INTRODUCTION Thank you very much for expressing your confidence in L T O products by purchasing L TO AMX-120 mixing console. The AMX-120 is a professional compact mixer . Y ou will get the smooth, accurate more natural and open sound from this apparatus, and it is really ideal for small gigs, recording and fixed P A installations. The AMX-120 ...
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Alto AMX-120 - page 6
5 2. FEA TURES 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 +4dB / -10dB gain select switch on stereo channels W arm, ...
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Alto AMX-120 - page 7
6 3. READY T O ST ART? 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 a ...
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Alto AMX-120 - page 8
7 4. CONTROL ELEMENTS L 0 -+ 1 5 8 BAL RIGHT LEFT LEVEL 0 -+ 1 5 8 BAL RIGHT LEFT LEVEL 0 -+ 1 5 8 BAL RIGHT LEFT LEVEL 0 -+ 1 5 8 BAL RIGHT LEFT LEVEL PEAK PA N RIGHT LEFT PEAK PA N RIGHT LEFT -+ 1 5 8 -+ 1 5 8 LEVEL LEVEL MAX - 8 2TK TO CTRL ROOM 2TK TO MIX T APE 0 AUX SENDS LEFT L R RIGHT 12-CHANNEL MIXING CONSOLE LTO R -1 20 +4dB -10dB +4dB -10 ...
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Alto AMX-120 - page 9
8 1 2 5 1 4.1 MONO MIC/LINE Channels 2 48 V olt phantom power It is available only to the XLR Mic sockets. Never plug in a microphone when phantom power is already on. Before turning phantom power on, make sure that all faders are all the way down. In this way you will protect your stage monitors and main loudspeakers. 4 -. LOW CUT Button By pressi ...
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Alto AMX-120 - page 10
9 LOW This is the Bass control. Boost male voice or kickdrum and bass guitar . Y our system will sound much bigger than what it is. The gain range goes from -15dB to +15dB and the center frequency is 80 Hz. 7 8 -. AUX SEND Control This control is used to adjust the level of the signal sent to AUX buses, and their adjustable range goes from - to +15 ...
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Alto AMX-120 - page 11
10 14 -. +4dBu/-10dBV Switch Y our 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 equipmen ...
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Alto AMX-120 - page 12
11 -. PHONES/CTRL ROOM Control This control sets the amount of signal sent to the control room and headphone. 23 4.7 PHONES This socket will send out the mix signal to a pair of headphones. 27 4.4 CTRL ROOM OUTPUT Connectors These 1/4" sockets are used to send the control room signal to the studio monitor speakers or a second set of P A. 24 L ...
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Alto AMX-120 - page 13
12 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: SHOCK HAZARD A VIS: RISQUE DE CHOC ELECTRIQUE - DO NOT OPEN - NE PAS OUVRIR SERIAL MODEL POWER ON OFF RA TED POWER CONSUMPTION: 11W PHANTOM 18V AC~ 29 2 30 4.9 REAR P ANEL Description - POWER ON/OFF Switch This switch is used to turn the main power ON and OFF . 29 - PHANTOM ON/OFF Switch This s ...
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Alto AMX-120 - page 14
13 T urn down all Input and output gain controls. Connect phantom powered microphones before switching on the +48V olt phantom power switch. If you have a power amplifier connected to your AMX-120 set the level of the amplifier at no more than 75%. what Now , set the CONTROL ROOM/PHONES level at no more than 50%. In this way you will be able to hea ...
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Alto AMX-120 - page 15
14 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. Y ou can use the unit with single instruments using The mixer's main insert or on "in-line" between a mixing console's output an ...
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Alto AMX-120 - page 16
15 6. FOR THE EXPERTS WHO W ANT T O KNOW MORE Modification on mono and stereo channels Before Disconnect the POST route AUX (PRE) POST After AUX (PRE) POST Solder the PRE route 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 -F ADER. If you have some skill in electroni ...
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Alto AMX-120 - page 17
16 7. BLOCK DIAGRAMS 1 2 3 4 5 6 7 8 A B C D 8 7 6 5 4 3 2 1 D C B A MONO INPUT CHANNELS ( 1-2 ) 2 1 3 MIC IN +48V 3-BAND EQ 12K 2.5K 80 SG/OL LEFT-BUS RIGHT-BUS AUX-1 STEREO INPUT CHANNELS (3-10) AUX SEND MAIN OUT 2 1 3 2TK TO MIX 2 1 3 T APE IN RIGHT 2-TRACK 2 1 3 2TK TO CTRL ROOM 2 1 3 PHONES OUTPUT LEFT METER RIGHT METER MAIN MIX AUX SEND1 T R ...
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Alto AMX-120 - page 18
17 8. TECHNICAL SPECIFICA TION Mono input channels Stereo input channels Impedances Equalization 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) 1 15dB Line input electronically bala ...
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Alto AMX-120 - page 19
18 9. W ARRANTY 1. W ARRANTY REGISTRA TION CARD T o obtain Warranty Service, the buyer should first fill out and return the enclosed W arranty Registration Card within 10 days of the Purchase Date. All the information presented in this W arranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport a ...
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Alto AMX-120 - page 20
NF -1.4 01656 No. 1, Lane 17, Sec. 2, Han Shi West Road, T aichung 40151, T aiwan http://www .altoproaudio.com T el: 886-4-22313737 email: alto@altoproaudio.com Fax: 886-4-22346757 c All rights reserved to AL T O. All features and content might be changed without prior notice. Any photocopy , translation, or reproduction of part of this manual with ...
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