Numark Industries DM 1820X User's Manual
Contents
1. bass by cutting the mid and bass on the first channel and the treble and mid on the other channel Master Level This controls overall output level Note that you can select 18 whether you want stereo or mono The Zone Levels control speaker volume for other outputs such as control booth monitors a tape deck another amplifier a sub woofer another mixer or a satellite speaker System Note that you can select 18 whether you want stereo or mono CONTRACTOR S NOTE Zone Level provides zone control in installations where there are two separate rooms eg a bar and a dance floor The Zone volume should be controlled from the mixer not from the amplifier The Stereo Mono Toggle Switches allow you to select either stereo or mono output Stereo Auto Peak Hold Level Meter The red LEDs for 3 5 and 8dB hold program peaks for an instant With peak metering it s OK to be in the red as long as 5 or 8dB isn t constantly lit Set crossover equalizer and power amplifier inputs to avoid distortion at each step in the audio chain Proper attention to the peak meters results in the punchiest possible sound without audible distortion PFL Meter When the Cue PFL switches are depressed this meter tracks pre fader listen PFL signal for the channel selected instead of the mixer s output level 12V BNC Connector allows a 12 volt gooseneck style Numark light to be connected directly to the mixer The Power button turns2. 1 dq dq Oo Lu ee 5 RI DJ Mic Talkover Switch When engaged this mutes your music sources from channels 1 4 Releasing it brings you immediately back to full source level It is very useful for announcements Channels 1 4 Input Toggle Switches select which source will be live to that channel based on what you have connected to the rear panel input section The Input Faders are low noise low impedance high quality smooth faders These control individual source levels in the mix Channel Cue Assign PFL pushbuttons are used to route channel audio to the Monitor Section The channel input faders do not control the Cue volume When the Cue button is pushed you get Pre Fader Listen PFL In addition when these buttons are depressed the third row of the LED meter 20 will display the signal level of that channel on a PFL basis The level can be adjusted by using the Gain control 1 Numark The Proven Leader in Technology 1997 Numark Industries http www numark com The Crossfader In Out Pushbutton defeats the entire Crossfader function but leaves the Kill functions active 10 Crossfader Kill Assign Switches lets you choose 11 which input channel will be heard when the Crossfader is moved to the left or right and affected by the Kill function The replaceable Crossfader achieves clean segues between two selected input channels 1234 HER G In this example Channel 1 is
3. 22 V output OUTPUTS Line 9V rms max 20 dBm Headphone Amp 5 watt into 47 Distortion less than 01 SIGNAL TO NOISE RATIOS vs maximum output Line Better than 82 dB Mic Better than 75 dB Phono Better than 75 dB FREQUENCY RESPONSE Mic 20 Hz 15k Hz 5 dB Line 20 Hz 20k Hz 5 dB Phono 1 dB except for controlled attenuation of 3 dB 20 Hz to reduce rumble and feedback CHANNEL EQ Bass 15db 80Hz Middle 10db 1KHz Treble 15db 12 5KHz TALKOVER ATTENUATION Variable from no cut to 16 dB KILL EFFECTS Bass 54dB at 50 Hz 3dB at 400 Hz Middle 44dB at 1k Hz 3dB at 200Hz Treble 53dB at 15k Hz 3dB at 2k Hz POWER CONSUMPTION 20 Watt typical 28 watt with full headphone output Numark The Proven Leader in Technology 1997 Numark Industries 14 http www numark com DM1820X BLOCK DIAGRAM Numark The Proven Leader in Technology 1997 Numark Industries 15 http www numark com Numark Professional Disc Jockey Products Warranty and Service Information Numark Industries LLC and Numark International Inc hereafter Numark warrants each new product manufactured and or supplied by it to be free from defects in material or workmanship under conditions of normal use and service for 360 days beginning on the date of purchase from an authorized Numark Dealer but not to exceed 2 years from date of shipment by Numark The Numark obligation under this warra
4. Features Page 5 Precautions Page 7 Front Panel Diagram Page 8 Rear Panel Diagram Page 11 Connection Instructions Page 12 Connection Diagram Page 13 Specifications Page 14 Block Diagram Page 15 Warranty and Service Page 16 Numark The Proven Leader in Technology 1997 Numark Industries 4 http www numark com DM1820X CONGRATULATIONS You have purchased the DM 1820X Stereo Mixer by Numark This equipment features all new circuitry and the latest in manufacturing and design technology to give you greater quality and better reliability than ever before The DM 1820X Preamp Mixer has been designed by Dus for DJs It gives you all of the controls and features you need in a professional piece of equipment to show off the best of your skills Thank you for buying Numark DJ products FEATURES e User replaceable assignable ALPs crossfader e Bass Mid Treble and Gain controls on every input channel e Left lt gt Right Pan control on each channel and the DJ Mic e Bass Mid amp Treble KILL switches for special effects and creative mixing Neutrik Combo connector allows 1 4 XLR plug to be used for DJ Mic e 8 line inputs e Three phono inputs switchable to line level e Processor Loop circuit for easily hooking up external effects Pushbutton Cueing with PFL pre fader listen on each channel e Headphone monitoring with PFL Program cross fader e Master and 2 Zone outputs e Ster
5. NOTE ON CABLES l Make the input and output connections with readily available stereo cables Quality cable makes a big difference in audio fidelity and punch Use balanced connections whenever possible See your Numark dealer or an electronics or audio specialist store if you are not sure which l cables to get SYSTEM PRECAUTIONS Use appropriate cables throughout your system Quality shielded audio cables and terminated shielded video cables low capacitance preferred Speaker cables must be 14 gauge minimum 12 or 10 gauge is better Reliability will be enhanced through the use of banana connectors on the speaker wires Observe correct speaker wire polarity If in doubt consult your Numark dealer or a qualified technician Take care to connect only one cable at a time Pay attention to the color coded labelled Input and Output jacks ALWAYS remember TURN AMPS ON LAST AND OFF FIRST Begin with master faders or volume controls on minimum and the amplifier gain input control s down Wait 8 to 10 seconds before turning up the volume This prevents transients which may cause severe speaker damage Use restraint when operating controls Try to move them slowly Rapid adjustments could damage speakers due to amplifier clipping Avoid amplifier clipping at all costs this occurs when the red LEDs usually on the front panel of most professional power amplifiers start flashing Cl
6. Numark zzi Professional Disc Jockey Products DM 1820X STEREO MIXER OWNER S MANUAL DM1820X R PRE AMP MIXER 02022222200000 CITT ye oooe 20009 000000005 eee oe c 1 2 jme i oil il NUMARK INDUSTRIES 11 Helmsman Road North Kingstown RI 02852 http www numark com DM1820X Numark The Proven Leader in Technology 1997 Numark Industries 2 http www numark com DM1820X Safety Information and Product Registration 6 Heat Avoid placing this product too close to any high heat sources such as radiators DE ae E 7 Power Sources This product should be connected to a power supply only of the type CAUTION TO REDUCE THE RISK OF ELECTRIC operating instructions or as SHOCK DO NOT REMOVE ANY COVER NO USER Mal Kear SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY CAUTION 8 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked upon or pinched by items placed on or against them When removing the cord froma power outlet be sure to remove it by holding the plug attachment and not by pulling on the cord The lightning flash with arrowhead symbol within the equilateral triangle is intended to alert the user to the presence of un insulated danger
7. audio sources into both Left and Right inputs using a Y cable connector E 8 Line Phono Input switch Use this to allow line level equipment to be plugged into your phono inputs giving you a total of 8 line input options 9 Phono Inputs on Channels 1 2 and 3use unbalanced RCA jacks Your input signal is fed directly to the DM1820X s high quality RIAA phono preamplifiers so use this position only for moving magnet cartridges Line level sources will overload the sensitive phono preamps and will sound very bad so always be sure to toggle the line phono switch over to line before connection of line Sources 10 AC Cord See safety precautions on page 3 for proper treatment of the power cord 11 Voltage Selector Set this for the appropriate voltage in your area 12 GND is the grounding lug for turntables 1 2 and 3 phono inputs on Channels 1 2 and 3 Always use this connection your turntable cable should have a grounding wire Numark The Proven Leader in DJ Technology 1997 Numark Industries http www numark com 1820 Instructions for Connection 1 Be sure the POWER 22 is OFF All connections should be made before the unit is turned on Always remember Turn Amps on last and off first 2 Use appropriate cables throughout your system quality shielded audio cables low capacitance preferred Speaker cable must be 14 gauge minimum 12 or 10 gauge is better 3 Connect your mu
8. d used service technician Do not attempt to alter this ourself 2 Retain Instructions The safety and operating instructions should be kept for future reference NOTE This apparatus does not exceed the Class A Class B whichever is applicable 3 Heed Warnings All warnings on this product and in limits for radio noise emissions from digital these operating instructions should be followed apparatus as set out in the radio interference regulations of the Canadian Department of 4 Follow Instructions All operating and other Communications instructions should be followed WARNING To reduce the risk of fire or electric 5 Water and Moisture This product should be kept shock do not expose this appliance to rain or away from direct contact with liquids moisture Electrical equipment should NEVER be kept or stored in damp environments Please record the serial number of your unit as shown on the back of the chassis as well as the name of the dealer from whom you purchased the unit Retain this information for your records Please return the Iwarranty card enclosed to register your mixer with us IMODEL DM1820X PURCHASED FROM ISERIAL NUMBER DATE OF PURCHASE Numark The Proven Leader Technology 1997 Numark Industries 3 http www numark com DM1820X NUMARK DM1820X STEREO MIXER INDEX Safety Information Page 3 Product Registration Introduction and
9. e exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you EQUIPMENT TRANSPORT A Return Authorization number should be obtained from Numark through the addresses or phone numbers below It is the customer s obligation when returning faulty equipment to properly pack the Numark equipment in its original packaging Failure to do so may inadequately protect the equipment in transit and therefore jeopardize the customer s warranty The defective Numark equipment should be sent FREIGHT PREPAID with Return Authorization number to NUMARK INDUSTRIES 11 Helmsman Road Telephone 1 401 295 9000 North Kingstown 02852 USA Fax 1 401 295 5200 Attention Service Department E mail numark numark com
10. eo Mono switch on the Master and Zones e Balanced Outputs e Tape Out for direct recording e Powerful stereo headphone output e High end performance audio signal e 12V BNC light connector Numark The Proven Leader in Technology 1997 Numark Industries 5 http www numark com 1820 As a special bonus we have included a right angle headhpone adapter with this mixer Just plug your headphones into the adapter and then plug the adapter into your mixer Numark The Proven Leader in Technology 1997 Numark Industries 6 http www numark com IMPORTANT INFORMATION DM1820X Please read this entire manual before connecting the DM1820X to your system For optimum performance Always make sure that AC power is OFF while making any connections Do not use excessively long cables i e over 50ft 14m Be sure plugs and jacks are tightly mated Loose connections can cause hum noise or intermittents that could easily damage your speakers Never use spray cleaners on the slide controls Residues cause excessive dirt build up and this will void your warranty In normal use slide controls can last for many years If they malfunction usually because of a dirty or dusty environment consult a professional technician Never attempt to make any adjustments or repairs other than those described in this manual Take the DM1820X to your dealer or to an authorized Numark Service Center
11. ipping is when the power amplifier is distorting and working beyond it s limits Amplifier distortion is THE major cause of speaker failure To prevent fire or shock hazard do not expose the unit to rain or moisture Never place cans of beer soda glasses of water or anything wet on top of the mixer Numark The Proven Leader in DJ Technology 1997 Numark Industries 7 http www numark com 1820 DM1820X FRONT PANEL DIAGRAM Channel Input Gain Trim Attenuation Controls These control the sensitivity of the inputs for Channels 1 4 Use these whenever a particular source causes overload of the preamp inputs Attenuation range is OdB to 20dB Use these with the PFL pre fader listen monitor when cueing Treble Middle and Bass Controls fine tune the tone of your music through the sound system Note that these are also available on the DJ Mic Use the Pan Control to maximize the Left or Right side of your Source Send button will send the individual channel signal to the send jack on the rear panel This is used to route to an external effects unit The signal comes back in from the effects unit through any line input channel you select and is then sent out to your amplifier through the Master Output jacks on the rear panel 0 0 a Stu aO gO s bem oix d x3 ie oO 0 OR oO 20 53 om om 5 en 6 cep 18 e a is a L
12. nty is limited to repairing or replacing at its option the product or part s therein which upon examination by Numark shall appear to be defective or not up to factory specifications providing the Numark product is returned transportation prepaid to Numark Numark shall not be liable for any damages consequential or otherwise resulting from the use and operation of this product and makes no other warranty s either express or implied on this product including any warranty of merchantability This warranty does not extend to any of our products which have been subjected to misuse neglect accident incorrect wiring not our own improper installation or use in violation of instructions furnished by us nor extended to units which have been repaired or altered outside of our factory nor to cases where the serial number thereof has been removed defaced or changed nor to accessories used therewith not of our own manufacture Numark reserves the right to make changes or improvements in its products during subsequent production without incurring the obligation to install such changes or improvements on previously manufactured equipment To place this warranty into effect the enclosed WARRANTY REGISTRATION CARD must be returned to Numark Industries LLC within thirty 30 days after date of purchase This warranty gives you specific legal rights and you may also have other rights which vary from state to state Some states do not allow th
13. ous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons 9 Object Liquid Entry Take care that objects do not fall into and that liquids are not The exclamation point within the equilateral triangle is intended spilled into the inside of the mixer to alert the user to the presence of important operating and maintenance servicing instructions in the literature 9 10 Damage Requiring Service This product EE should be serviced only by qualified personnel If you have any questions about service CAUTION please contact Numark at the number s shown FOR USA amp CANADIAN MODELS ONLY on the back cover of this manual TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED PLUG WITH AN EXTENSION CORD RECEPTACLE 11 Grounding or Polarization Precautions OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY should be taken so that the grounding or INSERTED TO PREVENT BLADE EXPOSURE polarization means built into the mixer is not defeated SAFETY INSTRUCTIONS 12 Internal External Voltage Selectors Internal or external voltage selector switches if any 1 Read Instructions All the safety and operating should only be reset and re equipped with a instructions should be read before this product is proper plug for alternative voltage by a qualified connected an
14. selected on the Left and Channel 3 is selected on the Right With the Crossfader centered both assigned channels are live Use the Crossfader for fast and seamless segues from one channel to the next Note the crossfader is user replaceable Simply unscrew the two large screws which hold it in place lift it out and disconnect its cable Reattach the new crossfader and screw it back onto the unit you re back in business REPLACEMENT CROSSFADERS can be purchased from your local Numark Dealer or by calling Numark Industries 12 The Split Cue Level controls what signal is being monitored through your headphones Move the slide control to the left and you will hear your source music from the channel s selected with the cue PFL switch Move the control to the right and you will hear your program mix or output The slide control allows fast and frequent headphone monitoring 13 The Headphone Level control sets the volume in your headphones 14 The Headphone Jack accepts a 1 4 plug and is set on the front of the unit 15 Kill Switches and LEDs have been provided for Treble Mid and Bass Control on each side of the crossfader This allows you to mute that frequency s audio output while 16 17 18 19 20 21 22 23 DM1820X leaving the other frequencies playing This area is always active even when the crossfader is not Try that for a neat effect or mix one channel s treble with another channel s
15. sic sources on the rear of the unit Up to phono and 8 line sources CD players cassette decks tuners etc can be connected When connecting to an input with a phono line option switch remember to set the switch accordingly 4 Connect the ground wire from your turntables and any other sources that come with a ground to the ground post on the rear panel This will eliminate most common hum and feedback problems 5 Connect your DJ mic on the front left side of the unit 23 or on the back of the unit at Mic 1 Connect your second mic at Mic 2 on the back of the unit 6 Connect your headphones on the front right side of the unit at 14 7 OUTPUT MASTER jacks on the rear of the unit are for connecting to the amplifier Use the balanced outputs if possible Make sure you correctly attach the right and left cables to avoid phasing problems Numark The Proven Leader in DJ Technology 1997 Numark Industries 12 http www numark com DM1820X DM1820X CONNECTION DIAGRAM Outlet Sound System w Amplifier Numark The Proven Leader in Technology 1997 Numark Industries 13 http www numark com 1820 SPECIFICATIONS INPUTS Line 10kQ input impedance 100 mV rms sensitivity for 1 22 V output Mic 10kQ input impedance balanced unbalanced 3 mV rms sensitivity for 1 22 V output 50 mV rms max input Phono 47kQ input impedance 1 5 mV rms sensitivity 1 KHz for 1
16. the unit on and off Make sure your input faders 7 are turned down before you power up your mixer The Mic Jack is a Neutrik Combo Jack and allows connection of either a 1 4 jack or an XLR jack This is ideal for connecting an XLR Gooseneck directly Numark The Proven Leader in DJ Technology 1997 Numark Industries http www numark com 1820 Numark The Proven Leader Technology 1997 Numark Industries 10 http www numark com DM1820X DM1820X REAR PANEL DIAGRAM Oooooo 00 00 0000 _ 60990 99999999 OO 1 The Balanced Main Outputs are low impedance XLR type connectors controlled by the Master fader 2 The Stereo Main Outputs are low impedance RCA connectors controlled by the Master fader 3 The Tape Outputs are low impedance unbalanced RCA jacks which output the program mix and allow you to connect any recording device 4 The Stereo Zone Outputs are low impedance unbalanced RCA jacks controlled by the Zone Level controls 5 The Send can be attached to an external effects processor such as a sampler 6 Mic is the mic input for the Mic Channel and Channel 4 7 Channels 1 5 Line Inputs are unbalanced RCA jacks The Line Input is selected with the toggle switch on the front panel You can connect stereo audio from HiFi VCRs cassette and reel to reel tape decks DAT machines CD players laser discs tuners even synthesizers or other mixing consoles NOTE Plug mono
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