User`s Manual - Alto Professional
Contents
1. OF ANIT ONOHd TINNVHO OT THAT ANIT I t H i e lt J 4 4141 ore GEMS 5 XIN 4 IH GIN OT 5 29 I lt L1 Hyer 4 414 OEMS 5 lt IH I t i TT 9 i H 4 44 OT L ba 1 N oaanvers H e lt 4 4 4 Ld 16 en M IMS VMS TAO 5 ANIT ONOHd LAdND 1 i LAdNI OWN 6 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 this2. A lt 20 2 CHANNEL DJ MIXER PHONOILINE MAIN MIC Q Q GAIN MAIN C TREBLE MIC LEVEL MIDDLE N 3 1 1 The CHANNEL Section PHONO LINE Switch This switch is available on both input channels You shall use the LINE position for all high level audio signals such as CD Players DAT MD etc You shall use the PHONO position to connect the turntables The GAIN Control this knob you will adjust the input level Do turn this control too much clockwise or you will overload the at channel but do not turn it too much counterclockwise you will generate background hiss The EQUALIZER Control Each input channel is provided with 3 bands equalizer 3 Middle 4 and Bass 5 and you can ad just the gain range of each from 30dB to 15dB BASS The PROGRAM Fader 6 There is Program Fader available on both channels These faders are used to adjust the overall level of the input channels 3 1 2 The MIC MAIN Section MAIN LEVEL Control This knob controls the overall output volume MIC LEVEL Control You can adjust the level of the microphone signal via this control AN MIN MAX MIC LEVEL 3 1 3 The PFL pre fader level Section When you connect a headphone to your MX 20 you
3. Damage which may have been caused either directly or indirectly by another product force etc e Abnormal service or repairing by anyone other than the qualified personnel or technician And in such cases all the expenses will be charged to the buyer 3 5 In no event shall ALTO be liable for any incidental or consequential damages Some states do not allow the exclu sion or limitation of incidental or consequential damages so the above exclusion or limitation may not apply to you 3 6 This warranty gives you the specific rights and these rights are compatible with the state laws you may also have other statutory rights that may vary from state to state 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 manual without written permission is forbidden Copyright 2005 SEIKAKU GROUP 01614 1 4
4. card will void your warranty service 2 RETURN NOTICE 2 1 In case of return for any warranty service please make sure that the product is well packed in its original shipping carton and it can protect your unit from any other extra damage 2 2 Please provide a copy of your sales receipt or other proof of purchase with the returned machine and give detail information about your return address and contact telephone number 2 3 A brief description of the defect will be appreciated 2 4 Please prepay all the costs involved in the return shipping handling and insurance 3 TERMS AND CONDITIONS 3 1 ALTO warrants that this product will be free from any defects in materials and or workmanship for a period of 1 year from the purchase date if you have completed the Warranty Registration Card in time 3 2 The warranty service is only available to the original consumer who purchased this product directly from the retail dealer and it can not be transferred 3 3 During the warranty service ALTO may repair or replace this product at its own option at no charge to you for parts or for labor in accordance with the right side of this limited warranty 3 4 This warranty does not apply to the damages to this product that occurred as the following conditions Instead of operating in accordance with the user s manual thoroughly any abuse or misuse of this product Normal tear and wear e The product has been altered or modified in any way
5. paying attention to your suggestions and your comments Following this idea we create our products and we will create the new ones From our side we guarantee you and we will guarantee you also in future the best quality the best fruits of our continuous researches and the best prices Our ALTO MX 20 2 CHANNEL DJ MIXER has extensive features i e 2 phono line inputs 1 microphone input treble middle and bass EQ on each channel crossfader control etc which are suitable for many other professional appli cations We would like to thank all the people who made the ALTO MX 20 2 CHANNEL DJ MIXER especially to our designers and ALTO staff It is their passion for music and professional audio that has made it possible for us to offer you our most important team member our continued support Thank you very much ALTO AUDIO TEAM TABLE OF CONTENTS Sau Nasua ana Siaka aday ah kusa pasa ss 4 2 FEATURE LIST sinatasnnnndesaisanetestenversensedveriascestneveisdsesceiaddiauabiancaansiavecaned 4 3 CONTROL ELEMENT Sivsissicssscsscccncscsstesesisasassanstesersesnssannssesseaasscaieersescansseniseniessnusnasusriasseniascanitiesseasiuens 5 3 1 The Top Cover 3 1 1 The CHANNEL Section 3 1 2 The MIC MAIN Section 3 1 3 The PFL pre fader level Section 3 1 4 The LEVEL METER Section 3 1 5 The CROSSFADER Section 3 2 The Front Panel 3 2 1 MIC IN Jack 3 2 2 The PHONE OUT Jack 3 3 The Rear Panel 3 3 1 AC Inlet
6. The Rear Panel UK AUST USA Canada 240 50Hz 100 120V 60Hz Fuse T100mAL Fuse T200mAL AC INPUT EUROPE 210 240V 50Hz Fuse T100mAL RATED POWER CONSUMPTION 10W A105 Apparaten skall anslutas till Jordat uttag nar den ansluts Till ett natverk MAIN TAPE LINE PHONO LINE PHONO x 3 3 1 AC Inlet and Fuse Holder This connector is meant for the connection of the supplied power cord Please check the voltage accepted by the unit and the voltage available from your AC sockets before connecting the unit to the mains 3 3 2 POWER Switch This switch turns the Mixer ON and OFF 3 3 3 MAIN OUT Both MAIN output and TAPE output are RCA type connectors Through the MAIN output you can connect your 20 to an amplifier Through the TAPE output you can connect your MX 20 to a tape recorder 3 3 4 INPUT PHONO input Both Channels feature PHONO inputs including RIIA preamplifier for turntable PIN RCA jacks shall be used to connect the turntable LINE input Through these RCA type sockets you can connect a CD player an MD player or any other high level device such as Tape Recorder DAT etc Important Notice If you wish to connect LINE level devices into the LINE PHONO input make sure that the LINE PHONO switch is on LINE position otherwise the sensitive RIAA preamplifier built in in the Phono input will be overloaded and will produce distortion 3 3 5 GND Screw This gr
7. User s Manual 20 2 CHANNEL DJ MIXER tf ikl a LTO www altoproaudio com Version 1 4 October 2005 English SAFETY RELATED 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 This symbol wherever used alerts you to impo rtant operating and maintenance instructions Please read Protective Ground Terminal AC mains Alternating Current Hazardous Live Terminal Denotes the product is turned on OFF Denotes the product is turned off WARNING Describes precautions that should be observed to prevent the possibility of death or injury to the user CAUTION Describes precautions that should be observed to prevent damage to the product Disposing of this product should not be placed in municipal waste and should be Separate collection Power Supply Ensure that the mains source voltage AC outlet matches the voltage rating of the product Failure to do so could result in damage to the product and possibly the user Unplug the product before electrical storms occur and when unused for long periods of time to reduce the risk of electric shock or fire External Connection Always use proper ready made insulated mains c
8. abling power cord Failure to do so could result in shock death or fire If in doubt seek advice from a registered electrician Do Not Remove Any Covers Within the product are areas where high voltages may present To reduce the risk of electric shock do not remove any covers unless the AC mains power cord is removed Covers should be removed by qualified service personnel only No user serviceable parts inside e Fuse To prevent fire and damage to the product use only the recommended fuse type as indicated in this manual Do not short circuit the fuse holder Before replacing the fuse make sure that the product is OFF and disconnected from the AC outlet Protective Ground Before turning the product ON make sure that it is connected to Ground This is to prevent the risk of electric shock Never cut internal or external Ground wires Likewise never remove Ground wiring from the Protective Ground Terminal Operating Conditions Always install in accordance with the manufacturer s instructions To avoid the risk of electric shock and damage do not subject this product to any liquid rain or moisture Do not use this product when in close proximity to water Do not install this product near any direct heat source Do not block areas of ventilation Failure to do so could result in fire Keep product away from naked flames IMPORTANT SAFETY INSTRUCTIONS Read these instructions Follow all instructions Keep th
9. and Fuse Holder 3 3 2 POWER Switch 3 3 3 MAIN OUT 3 3 4 INPUT 3 3 5 GND Screw 4 TECHNICAL 10 11 6 12 1 INTRODUCTION What a great DJ mixer you have just bought Your MX 20 is packed with features such as 2 turntable inputs 2 line inputs 1 microphone input 3 bands equaliser and gain control for per channel Though your MX 20 is very easy to operate Please go through this manual carefully and you will get the best out of your MX 20 2 FEATURE LIST 5 inputs 2 phono 2 line inputs 1 microphone input e 2 master output through RCA connector headphone output via 1 4 TRS jack Crossfader control e PFL switch e Gain control on each channel e Treble middle and bass equalizer on each channel e Highly accurate 10 segment bar graph meters 3 CONTROL ELEMENTS 3 1 The Top Cover C 4 LEVEL CH1 PHONO LINE N MA GAIN CH2 30dB 15dB MIX W MIDDLE MAIN PFL 15dB LEVEL METER BASS 7 4 2
10. ese instructions Do not discard Heed all warnings Only use attachments accessories specified by the manufacturer Power Cord and Plug Do not tamper with the power cord or plug These are designed for your safety Do not remove Ground connections If the plug does not fit your AC outlet seek advice from a qualified electrician Protect the power cord and plug from any physical stress to avoid risk of electric shock Do not place heavy objects on the power cord This could cause electric shock or fire Cleaning When required either blow off dust from the product or use a dry cloth Do not use any solvents such as Benzol or Alcohol For safety keep product clean and free from dust Servicing Refer all servicing to qualified service personnel only Do not perform any servicing other than those instruc tions contained within the User s Manual PREFACE Dear Customer Thanks for choosing ALTO 20 2 CHANNEL DJ MIXER and thanks for choosing one of the results of ALTO AUDIO TEAM s work and researches For our ALTO AUDIO TEAM music and sound are more than a job It is a passion and an 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 Because we are convinced you are the most important member of ALTO AUTIO TEAM and the one confirming the quality of our job we like to share with you our work and our dreams
11. have the chance of pre listening the audio signal before the signal reach the main output LEVEL Control 9 9 This knob will adjust the volume of the headphone signal uN eve The MIX Control Through this control you can mix the signal between Che CH1 and CH2 3 1 4 The LEVEL METER Section main MAIN PFL Switch When this switch is in MAIN function MAIN LED on the level Meter will display the output level of the left and right channels When this switch is in PFL function PFL LED on the level Meter will display the PFL headphone signal 9 channel 1 on left LED meter and channel 2 on right LED 7 meter PFL LEVEL METER 4 LEVEL METER This 10 segments LED s Meter will read the signal selected by the MAIN PFL switch Please see above 000000000 000000000 3 1 5 The CROSSFADER Section The FADER Control Through this crossfader you can fade in between channel 1 and channel 2 The crossfader on your MX 20 is User replaceable 3 2 The Front Panel D a 2 3 2 1 IN Jack This output will accept any unbalanced low impedance microphone The functions of the microphone will be controlled by the MIC MAIN section on the top panel 3 2 2The PHONE OUT Jack This input will accept a standard headphone with a 1 4 stereo jack Through the PFL section on top panel you can adjust the headphone signal properly 3 3
12. ounding connection is provided for your turntables 4 TECHNICAL SPECIFICATIONS INPUTS Phono Inputs 1 and 2 48dB gain 1kHz unbalanced Line Inputs 1 and 2 8dB gain unbalanced Mic Input 58dB gain servo balanced OUTPUTS Headphones typically 125mW 1 THD Main Out max 21dBu Tape Out typically OdBu GENERAL Stereo Bass 15dB 30dB Stereo Middle 15dB 30dB Stereo Treble 15dB 30dB Input Gain Adjustment 20dB 6dB 3dB Signal to Noise ratio S N gt 85dB LINE Distortion THD lt 0 1 Frequency Response 20Hz 20KHz 2dB POWER SUPPLY Connector type 3 pole IEC grounded Mains Voltage USA 100 120V 60Hz Europe 210 240V 50Hz U K Australia 240V 50Hz Rated Power Consumption 10W Fuse 100 120V T200mAL 210 240V T100mAL PHYSICAL Dimension 221 5 L 245 W 76 6 H mm 8 7 X 9 6 X 3 0 Weight 2 6 5 73lb 5 SYSTEM BLOCK DIAGRAM 8 L ST ASV L Umer PS WVUDIC IJ 0 I 555 00C AON P 9060 UOISIA 3 ON POW 2715 WV DIC PUL TAJT 7134
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