User's Manual
Contents
1. ama ame 5 5 ee 22 222 22 22 22 222 222222 57 I 1 eee 2227 7 I L I 1 re 0 0 15 0 a ae 2b ees 0 SN8P1707Q a TEMPODIPEERENCE 1 PFLLEVEL II 1 gt 2 ss 2 Se NG a eee TIME OFFSET L 4 ohn SS 2 Titel DJM 4 BLOCK DIGRAM ee 8 4 Size Model No Revision L 1 7 DJM 4 V1 0 Date 16 Apr 2003 Sheet 1 of 1 File 4 DIGRAM Sch Drawn By TASY J S 1 2 3 4 5 6 7 8 120 14 WALSAS 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 of2. NE 1 i 1 I l 21 4 5 la Asal Sa M Oe eee 20 1 i PRONG lt PROE 1 LC a 3 BANDEQ L 1 R O LINE v LINE v ipp It enc IPLA yaan a Ip HT eat Ipods i Ik isa ian ia ana Ka PAKE ee es J CHANNEL I INPUT 1 LO MID HI PHONO LINE MAINOUT 3 BANDEQ LO MID HI MAINOUT 3 BANDEQ T 79 khe lt L 1 Rott 1 4 2 LO MID HI PHONO LINE 5 BOOTH 1 S MAINOUT L O L NNA TI 3 BANDEQ 14 1 I 1 LO MID HI 41 1 a Ne ren 1 1 11 3 BANDEQ SEND FROM PFL 11 11 1 1
3. The PHONE OUT Jack 3 3 The Rear Panel 3 3 1 AC Inlet and Fuse Holder 3 3 2 POWER Switch 3 3 3 GND Screw 3 3 4 The MAIN OUT 3 3 5 EFFECTS Send and Return 3 3 6 INPUT 4 TECHNICAL SPECIFICATION S vccssscsanccscntnesccnsancetsacaseexarsmactsnsamenanestessncseetcnstee 5 SYSTEM BLOCK 0 117 11 13 1 INTRODUCTION What a great DJ mixer you have just bought Your DJM 4 is packed with features such as digital beat counter 3 turn table input 3 line input microphone input 3 bands equaliser and replaceable cross fader just to mention a few Your DJM 4 is VCA Controlled and it is very easy to operate Please go through this Manual carefully and you will get the best out of your DJM 4 2 FEATURE LIST 8 Inputs 3 phono and 3 line inputs 1 microphone input 1 return e Main outputs through RCA connectors headphone output via 1 4 TRS jack e Gain Control and bass middle treble equaliser on each channel e Digital BPM beats per minute Counter e TALK control e SURROUND control e PFL switch e Crossfader curve Control e Accurate Led Meter 10 segment e VCA assisted Faders 3 CONTROL ELEMENTS 3 1 The Top Cover CHANNEL 1 PHONO LINE GAIN Oe BEAT ASSIST 2 Mo DIM 4 3 CHANNEL VCA CONTROLLED DJ MIXER WITH BEAT COU
4. and CH 3 respectively There is no KILL function for CH 1 3 2 2 The REVERSE Function Like the KILL function there are three modes for the REVERSE function TAP CENTER and HOLD It is used to invert the direction of the crossfader so that an immediate inversion of CH 2 and CH 3 will be achieved 3 2 3 MIC IN Jack This input will accept any unbalanced low impedance microphone The functions of the microphone will be controlled by the CHANNEL section on the Top Panel 3 2 4 CROSSFADER CURVE Control Via this knob you will adjust the crossfader curve Please see 8 earlier in this Manual for further reference 3 2 5 The PHONE OUT Jack This input will accept a standard headphone with a 1 4 stereo jack 3 3 The Rear Panel Apparaten skall anslutas till jordat uttag nar den ansluts GND GND GND till ett natverk SEND RETURN BOOTH FROM PFL MAIN PHONO LINE PHONO LINE PHONO 0 0000000 00000000000 AGINPUT MAIN OUT EFFECTS INPUT 3 INPUT 2 INPUT 1 EUROPE PHONO E PHONO E PHONO E 210 240V 50Hz LINE LINE om LINE Fuse T315mA RATED POWER CONSUMPTION 25W 3 3 1 AC Inlet and Fuse Holder Use it to connect your DJM 4 to the Main AC with the supplied AC cord Please check the Voltage available in your Country and make sure the voltage is identical to the values marking on the product Replace the fuse with the same type by the qualified personnel only 3 3 2 POWER Switch This switch turns the Mixer O
5. difference in tempo between the CH 2 and CH 3 or programs If the tempos on both channels are the same the center LED will light If the tempo of the music on channel 2 is faster the LED s on the left will start to light and vice versa TIME OFFSET Led segment This 7 segment Led Meter is positioned immediately below the Tempo Difference display This display will in dicate the synchronicity of the CH 2 and CH 3 When the two channels are synchronized the center LED will light If LED s on the left will start to light Channel 2 is getting out of sync and vice versa The CROSSFADER Through this crossfader you can fade in between CH 2 and The Crossfader on your DJM 4 is VCA Vol tage Control Amplifier controlled and it is User replaceable 3 2 The Front Panel BASS MIDDLE TREBLE REVERSE HOLD 8 0 KILL TAP REVERSE TAP CROSSFADER IN 2 CURVE SMOOTH SHARP 3 2 1 The KILL Function The KILL function is used to attenuate the three frequency bands BASS MIDDLE and TREBLE There are three modes TAP CENTER and HOLD There isn t KILL function in the CENTER position In TAP position the function is triggered instantly and the switch will return to the center position as soon as you release it In HOLD position the function will be locked in the HOLD position To cancel the effect you will need to push back the switch in the center position The left and right KILL function are assigned to the CH 2
6. 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 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 e In
7. E position otherwise the sensitive RIAA preamplifier built in in the Phono input will be overloaded and will produce distortion 4 TECHNICAL SPECIFICATIONS INPUTS 40dB gain 1kHz unbalanced OdB gain unbalanced 40dB gain servo balanced OdB gain unbalanced OUTPUTS typically 125mW 1 THD max 21dBu max 21dBu typically 0dBu typically 008 GENERAL OOOO 15dB 30dB 50Hz 15dB 30dB 2 5KHz 15dB 30dB 10KHz 2 40dB 1KHz 26dB 10KHz gt 90dB LINE 70dB 3dB LINE lt 0 05 20Hz 20KHz 2dB 2008 9dB 3dB POWER SUPPLY pole IEC grounded USA Canada100 120V 60Hz 5 Europe210 230V 50Hz PK Australia240V 50Hz 25watts 05 120V TS00mAL 40 240 T315mAL DIMENSIONS WEIGHT 00000000 248 L x 245 W x 76 6 H mm 9 8 x 9 6 3 0 2 9Kg 6 391b 1 2 3 4 5 6 7 8 CHANNEL3 INPUT PHONO LINE i a E 1 A L H DSSS 8 4 Pode en I r r PHONO 2 La PHONO agi 11 LINE Vigo ts LINE Vigo tae 1140 0 2 4 2 KEN 1294 RETURNTO MAIN R ya EFFECTS NG 4
8. MAIN output MODE switch This is a 2 position switch When the switch is in STEREO position the PFL MIX control will fade between PFL signal and MAIN output When the switch is in SPLIT position the PFL MIX control has no influence on the PFL signal LEVEL METER 100 7 4 2 3 1 4 The LEVEL METER Section LEVEL METER This 10 segments LED s Meter will monitor the output level 0006006006060000 0060606006006000 3 1 5 The BPM Section 006000600606 TEMPO DIFFERENCE BEAT ASSIST This is a key and exclusive function in your DJM 4 mixer What is the Beat Per Minute function It simply indicate the speed of the music through a 3 digit display The beats per minute of the music are automatically measured by the BPM and then displayed on the 3 digit display Of course the two BPM counters are available for CH 2 and CH 3 Thanks to the BPM function you can mix more quickly songs with different tempo The TEMPO Display This 3 digit display will show the tempo of CH 2 and CH 3 If the tempo changes the display will change accordingly The BEAT ASSIST switch The Beat Assist button is available for CH 2 and CH 3 and it is below the Tempo display Press the Beat Assist button and you can manually regulate the beat The Led nearby the Beat Assist button will show you whether the function is active or not TEMPO DIFFERENCE Led segment This 7 segments Led Meter will indicate the
9. N and OFF 3 3 3 GND Screw GND is the supplementary grounding selection for other connected instruments 3 3 4 The MAIN OUT The AMP BOOTH and TAPE outputs are RCA type connectors Yes the same largely used in hi fi and are low impedance Through the AMP output 34 you can connect your DJM 4 to an amplifier and the level will be controlled by OUT Aon the Top panel Through the BOOTH output 35 you can connect your DJM 4 to an additional amplifier and or loudspeaker system and the level will be controlled by OUT B on the Top panel Through the TAPE output 36 you can connect your DJM 4 to a tape recorder The TAPE level is fixed so you should adjust the input level of the recorder 3 3 5 EFFECTS Send and Return You can send the PFL signal through the SEND 37 sockets to a signal processor such as reverb equaliser etc Then from the same effect unit you bring the signal back into the DJM 4 via the RETURN 38 sockets and the audio signal is routed into the MAIN output 3 3 6 INPUT PHONO input 39 The three Channels feature PHONO inputs including RIIA preamplifier for turntable PIN RCA jacks shall be used to connect the turntable LINE input 40 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 41 is on LIN
10. NTER MAIN OUT LINE LINE GAIN LEVEL METER 10 7 4 2 TREBLE TREBLE 2 6 7 3008 1948 0 30dB 15dB 9 6 SURROUND ON CURVE CURVE SHARP MID SOFT SHARP SOFT MIN MAX MIN MAX SURROUND PFL LEVEL PF N PFL MIX STEREO PFL MODE TEMPO DIFFERENCE TIME OFFSET BEAT ASSIST 3 1 1 The CHANNEL Section The MIC to PHONO LINE switch The channel 1 is equipped with the MIC to PHONO LINE switch This switch is used to select microphone input and phono line Input When it is in the right position you can use the PHONO LINE switch on the rear panel to input the line signal to the phono input connector PHONO LINE to LINE switch This switch is available on input channel 2 and channel 3 You should use the LINE position for all high level audio signals such as CD Players DAT MD etc You should use the PHONO LINE position to connect the turntables making sure that the PHONO LINE switch on the rear panel is on PHONO position With this switch the one on the rear panel on LINE position the Input Channel will accept a high level audio signal The GAIN control Via this knob you will adjust the input level Do not turn this control too much clockwise or you will overload the channel and do not turn it too much counterclockwise or y
11. User s Manual 3 CHANNEL VCA CONTROLLED DJ 4 DJ MIXER WITH BEAT COUNTER a LTO www altoproaudio com Version 2 0 August 2003 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 mains Alternating Current 4 Hazardous Live Terminal ON 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 WARNING e 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 cabling power cord Failure to do so could result in shock death or fire If in doubt seek advice f
12. evelop an impressive range of audio specific algorithms By purchasing our ALTO products you become the most important member of our ALTO AUDIO TEAM We would like to share with you our passion for what we design and invite you to make suggestions which will aid us in develop ing future products for you We guarantee you our commitment for quality continual research and development and of course the best prices The ALTO DJM 4 is an extremely flexible 3 Channel VCA CONTROLLED DJ Mixer with Beat Counter configured with three input channels Each channel is equipped with a variety of key features including 3 inputs 1 microphone input intelligent dual auto beats per minute counter with time and beat sync display treble middle and bass EQ on each channel crossfader curve etc We would like to thank all the people who made the ALTO DJM 4 3 Channel VCA CONTROLLED DJ Mixer with Beat Counter possible 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 3 1 The Top Cover 3 1 1 The CHANNEL Section 3 1 2 The MAIN OUT Section 3 1 3 The PFL Section 3 1 4 The LEVER METER Section 3 1 5 The BPM Section 3 2 The Front Panel 3 2 1 The KILL Function 3 2 2 The REVERSE Function 3 2 3 MIC IN Jack 3 2 4 CROSSFADER CURVE Control 3 2 5
13. fied 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 instructions contained within the User s Manual PREFACE Dear Customer Thank you for choosing the ALTO DJM 4 3 Channel VCA CONTROLLED DJ Mixer with Beat Counter which is the result of our ALTO AUDIO TEAM s endeavours For the ALTO AUDIO TEAM music and audio is 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 ALTO line represents unparalleled analogue and digital products made by musicians for musicians With our design centres in Italy the Netherlands and the United Kingdom we provide you with world class designs while our software development teams continue to d
14. of the AMP output on rear panel Lert Richt The OUT B control The OUT B control is used to adjust the main level of the BOOTH output on rear panel The TALK control When you speak through a connected microphone the volume of the reproduced music will be automatically reduced by the mixer for better intelligibility of your voice You can determine URROUND ON yourself how much the volume of the music will be reduced TALK via this control You can turn off the TALK function via this button 14 The SURROUND control DJ Mixers are often used in quite inappropriate venues and the positioning of the loudspeakers is not always optimal 1 1 1 1 1 9 gt 2 Oe S NO The Surround Control allow you to get a better transparency and stereo image and will contribute to clean you mix SURROUND ON switch You can turn off the Surround function via this switch You can also run fast A B comparison with surround without surround via this switch 3 1 3 The PFL Section When you connect a headphone to your DJM 4 you have the MAIN chance of pre listen the audio signal before the signal reach the Main output stereo 1 PFL MODE LEVEL control This knob will adjust the level of the headphone signal The PFL MIX control When set the switch mode 19 in STEREO position you can fade between PFL and
15. ou will generate background hiss The EQUALISER control Each Input Channel is provided with 3 bands equaliser Treble 4 Middle 5 and Bass 6 and you can adjust the gain range of each from 30dB to 15dB The PROGRAM Fader There is a Program Fader available on each input channel For optimum performance and operation the 3 Faders are VCA Voltage Control Amplifier controlled These Faders adjust the overall level of the input channels The CURVE control Each input channel includes a 3 position switch denomi nated CURVE If you set the CURVE switch on SHARP position the level will be changed quite quickly by the PROGRAM Fader even if you move the Fader slowly If you set the CURVE switch in SOFT position the level will be changed much more slowly by the PROGRAM Fader even if you move the Fader quickly If you set the CURVE switch in MID position you will com bine the SHARP and SOFT configuration The PFL button 9 This button is used to route the input signal of corresponding channel to PFL section via pressing it CHANNEL 1 CHANNEL 3 LINE LINE MIN MAX GAIN w a 0 0 a 3 1 2 The MAIN OUT Section The OUT A control The OUT A control is used to adjust the main level of the AMP output on rear panel MAIN OUT IN OUTA The BAL A control The BALA control is used to adjust the stereo balance
16. rom a registered electrician e 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 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 these instructions Do not discard Heed all warnings Only use attachments accessories speci
17. stead 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 e 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 SEKAKU ELECTRON IND H K CO LTD NO 1 LANE 17 SEC 2 HAN SHI WEST ROAD TAICHUNG 401 TAIWAN http www altoproaudio com Tel 886 4 22313737 email alto altoproaudio com 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 2003 Sekaku Electron
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