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User's Manual
MACRO
PROFESSIONAL HIGH
830/1400/2400 POWER STEREO AMPLIFIER
R
LTO
www.altoproaudio.com
Version 1.0 April 2002
English
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SAFETY RELATED SYMBOLS wire or disconnect the wiring of protective grounding terminal. CAUTION RISK OF ELECTRIC SHOCK Operating Conditions DO NOT OPEN This apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, This symbol, wherever it appears, alerts you such as vases, shall be placed on this apparatus. to the presence of uninsulated dangerous voltage To reduce the risk of fire or electric shock, do not inside the enclosure-voltage that may be su- expos
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Preface Dear Customer, Thanks for choosing LTO MACRO 830/1400/2400 Professional High Power Stereo Amplifier and thanks for choosing one of the results of LTO AUDIO TEAM job and researches. For our LTO AUDIO TEAM, music and sound are more than a job ...are first of all passion and let us say...our obsession! We have been designing professional audio products for a long time in cooperation with some of the major brands in the world in the audio field. The LTO line presents unparalleled analogue an
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TABLE OF CONTENTS 1. INTRODUCTION.............................................................................................................4 2. FEATURE LIST...............................................................................................................4 3. CONTROL ELEMENTS...................................................................................................4 3.1 The Front Panel 3.2 The Rear Panel 4. INSTALLATION & CONNECTION.........................................
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1. INTRODUCTION Thank you very much for expressing your confidence in LTO products by purchasing our MACRO 830/ 1400/2400 Professional Stereo Amplifier . With the MACRO 830/1400/2400 you have acquired an extremely musical and flexible High Power Amplifier which is based on many years of experience and findings in amplifier technology and is used through the world in the renowned studios. The MACRO 830/1400/2400 is used for professional output of stage stereo at three levels of power, with excell
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2 1 3 2 1 3 4. Level controls for CHANNEL A, B These level Controls are used to adjust the output signal level, you'd better adjust them properly to avoid any distortion . 5. Protection LED This red LED indicator lights up when the thermal-protection system is working ,no signal is output during this protection period, and this means any overheating occurs inside the unit (the critical temperature is 80 ), you must take actions to avoid this overheating ,e.g. :speed up the air circulation, decre
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speaker systems by over loading or overheating . This LF30Hz Filter is used to prevent this happening ,and add an appropriate low-pass filter in the input circuit 13.Fan This fan releases the heating from the unit by accelerating the air circulation (air flow from front to back), and its speed is continuously variable. 4. INSTALLATION & CONNECTION : 4.1 Mains Connection Do not insert the power cord into this unit until voltage has been correctly set. Do not plug the power cord into the mains unt
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2 1 3 2 1 3 b. In Line Connection For these applications, the MACRO 830/1400/2400 Professional High Power Amplifier provides XLR connectors And 1/4" TRS phone jack to easily interface with most professional audio devices. Follow the configuration Examples below for your particular connection. Balanced Tip Tip Ring Ring Sleeve Sleeve TIP RING SLEEVE SLEEVE RING TIP 1 1 2 2 3 3 Tip 1 Ring 2 Sleeve 3 TIP RING SLEEVE Unbalanced Tip 1 Ring 2 Sleeve 3 TIP RING SLEEVE Tip 1 2 Sleeve 3 TIP SLEEVE 1 Cent
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2 1 3 2 1 3 2 1 3 2 1 3 Input wiring tips BALANCED UNBALANCED GND SHIELD 1 1 3 3 2 2 FROM FROM INPUT INPUT SOURCE SOURCE + + SHIELD SHIELD INPUT CH-B CONNECTION (+) SRT 2 1 LINE 3 T(+) WARNING (GND) CHANNEL B TO REDUCE THE RISK OF FIRE () R( ) BREAKER OR ELECTRIC SHOCK, DO NOT S(GND) EXPOSE THIS APPARATUS TO RAIN OR MOISTURE. SEE INSTRUCTION BEFORE OFF ON USING! LF 30HZ FILTER BRIDGED BALANCED 1.15V/20K MONO INPUT BRIDGED CHANNEL A CHANNEL B LINE STEREO PARALLEL CHANNEL A (MONO) MODEL OFF ON CLI
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2 1 3 2 1 3 2 1 3 2 1 3 Input wiring tips BALANCED UNBALANCED GND SHIELD 1 1 3 3 2 2 FROM FROM INPUT INPUT SOURCE SOURCE + + SHIELD SHIELD INPUT CH-B CONNECTION (+) SRT 2 1 LINE 3 T(+) WARNING (GND) R( ) TO REDUCE THE RISK OF FIRE NO USING () BREAKER OR ELECTRIC SHOCK, DO NOT S(GND) EXPOSE THIS APPARATUS TO RAIN OR MOISTURE. SEE INSTRUCTION BEFORE OFF ON USING! LF 30HZ FILTER BRIDGED MONO BALANCED 1.15V/20K INPUT BRIDGED CHANNEL A CHANNEL B LINE STEREO PARALLEL CHANNEL A (MONO) MODEL OFF ON CLIP
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6.2 Caution for Speaker Connection The output capacity of out MACRO 830/1400/2400 Professional Stereo Amplifier is very high, be sure to use a speaker system that has sufficient input capacity. If the input capacity of your speaker system is lower than the rated output of the MACRO 830/1400/2400 Professional Stereo Amplifier, you can protect your speakers by connecting a fuse serially between the speaker and the amplifier as shown below. (+) Fuse + Speaker (-) - System Output MACRO2400 PROFESSIO
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7.2 Block Diagram 11 CH-A CH-A E.R LA DIF PWR AMP 30Hz-9dB INPUT OUTPUT LINK MODE TURN-ON CIRCUIT SHOCK DC OFFSET +/- 1.15VRMS AUTORAMP DC SERVO +4dB SUB WOOFER OVER TEMP MONO 15Kohm (OPTION) SHORT CIRCUIT BRIDGED BALANCED PARALLEL CURRENT LIMITER TURN-ON/TURN-OFF TRANSIENTS CH-B CH-B E.B LA DIF PWR AMP 30Hz-9dB OUTPUT INPUT OPTION LINK CH-A BINDING POST ACTIVE TERMINALS POWER CLIP SWITCH CH-B AC POWER 120V/220V/230V /240V50/60Hz (OPTION) CH-A SIG POWER TRANS AMP NOTICE CH-B CH-A CIRCUIT BREAKER
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8. 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 under- standing 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 wi
