Numark Industries DM1720X User's Manual
Contents
1. Numark Professional Disc Jockey Products DM1720X STEREO MIXER OWNER S MANUAL DM1720X B eeeees oor 99906 eeceeeococ 0006 E 9 S g vm H PA sn 3 e 08 6 s o a U e Pe ee 000000 eee So oe 000 y A 9 P PREAMP MIXER ete 3 NUMARK INDUSTRIES 11 Helmsman Road North Kingstown RI 02852 http www numark com DM1720X Safety Information and Product Registration CAUTION RISK OF ELECTRIC SHOCK AN DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE ANY COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY The lightning flash with arrowhead symbol within the equilateral triangle is intended to alert the user to the presence of un insulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within the equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying this appliance CAUTION FOR USA amp CANADIAN MODELS ONLY TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED PLUG WITH AN EXTENSION CORD RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXP2. BLOCK DIAGRAM Numark The Proven Leader in DJ Technology 01998 Numark Industries 11 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 warranty 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 def
3. DM1720X FRONT PANEL DIAGRAM O OC 18 821 E lll e o O MM 19 2 O l 800000 5 95 6 qo qe 17 9 qe 7 i 16 EUM PE a wait man rex omit a M89 8 H H r o e i 9 e 9 13 14 11 1 Channel Input Gain Trim Attenuation Controls 5 DJ Mic Talkover Switch When engaged this mutes These control the sensitivity of the inputs for Channels 1 4 your music sources from channels 1 4 Releasing it brings Use these whenever a particular source causes overload of you immediately back to full source level It is very useful the preamp inputs Attenuation range is OdB to 20dB Use for announcements these with the PFL pre fader listen monitor when cueing 6 Channels 1 4 Input Toggle Switches select which 2 Treble Middle and Bass Controls fine tune the tone source will be live to that channel based on what you have of your music through the sound system Note that these connected to the rear panel input section are also available on the DJ Mic 7 Thelnput Faders are low noise low impedance high 3 Usethe Pan Control to maximize the Left or Right side of quality smooth faders These control individual source your Source levels in the mix 4 TheMic JackisaNeutrik Combo Jack and allows 8 Channel Cue Assign PFL pushbuttons are used to connection of either a 1 4 jack or an XLR jack This is ideal route channel audio to the Monitor Section The channel for connecting a
4. 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 7 The OUTPUT MASTER jacks on the rear of the unit are for connecting to the amplifier DM1720X CONNECTION DIAGRAM Sound System w Amplifier Numark The Proven Leader in DJ Technology 1998 Numark Industries 9 http www numark com DM1720X SPECIFICATIONS INPUTS Line 47kQ input impedance 78mV rms sensitivity for 1 22 V output Mic 10kQ input impedance balanced unbalanced 3 mV rms sensitivity unbalanced for 1 22 V output 1 5 mV rms sensitivity balanced for 1 22 V output 80 mV rms max input unbalanced 40 mV rms max input balanced Phono 47kQ input impedance 1 2 mV rms sensitivity O 1 KHz for 1 22 V output OUTPUTS Line 9V rms max 420 dBm Headphone Amp 5 watt into 47 Distortion less than 01 SIGNAL TO NOISE RATIOS vs maximum output Line Better than 87 dB Mic Better than 86 dB Phono Better than 86 dB FREQUENCY RESPONSE Mic 20 Hz 20k Hz 5 dB Line 20 Hz 22k 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 14 dB POWER CONSUMPTION 18 Watt typical Numark The Proven Leader in DJ Technology 1998 Numark Industries 10 http www numark com DM1720X
5. OSURE SAFETY INSTRUCTIONS 1 Read Instructions All the safety and operating instructions should be read before this product is connected and used 2 Retain Instructions The safety and operating instructions should be kept for future reference 3 Heed Warnings All warnings on this product and in these operating Instructions should be followed 4 Follow Instructions All operating and other instructions should be followed 5 Water and Moisture This product should be kept away from direct contact with liquids 6 Heat Avoid placing this product too close to any high heat sources such as radiators 7 Power Sources This product should be connected to a power supply only of the type described in these operating instructions or as marked on the unit 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 9 Object and Liquid Entry Take care that objects do not fall into and that liquids are not spilled into the inside of the mixer 10 Damage Requiring Service This product should be serviced only by qualified personnel If you have any questions about service please contact Numark at the number s shown on the back cover of this manual 11 Grounding
6. aced 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 the 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 RI 02852 USA Fax 1 401 295 5200 Attention Service Department E mail numark numark com
7. d 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 16 17 18 19 21 DM1720X 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
8. dphones into the adapter and then plug the adapter into your mixer Numark The Proven Leader in DJ Technology 1998 Numark Industries 4 http www numark com IMPORTANT INFORMATION DM1720X Please read this entire manual before connecting the DM1720X 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 DM1720X to your dealer or to an authorized Numark Service Center NOTE ON CABLES Make the input and output connections with readily available ow capacitance 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 I cables to get SYSTEM PRECAUTIONS Use appropriate cables throughout your system Quality sh
9. e 8 Connection Instructions Page 9 Connection Diagram Page 9 Specifications Page 10 Block Diagram Page 11 Warranty and Service Page 12 Numark The Proven Leader in DJ Technology 1998 Numark Industries 3 http www numark com DM1720X CONGRATULATIONS You have purchased the DM1720X 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 DM1720X Preamp Mixer has been designed by DJs 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 Neutrik Combo connector allows 1 4 or XLR plug to be used for DJ Mic e 8 Phono and 5 Line inputs e Pushbutton Cueing with PFL pre fader listen on each channel e Headphone monitoring with PFL Program cross fader e Master and Zone outputs e Stereo Mono switch on the Master and Zones e Tape Out for direct recording e Powerful stereo headphone output e High end performance audio signal e 12V BNC light connector As a special bonus we have included a right angie headphone adapter with this mixer J ust plug your hea
10. ielded 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 Clipping 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 1998 Numark Industries 5 http www numark com DM1720X
11. n XLR Gooseneck directly 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 19 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 DJ Technology 1998 Numark Industries 6 http www numark com 10 11 The Crossfader In Out Pushbutton defeats the entire Crossfader function but leaves the Kill functions active The replaceable Crossfader achieves clean segues between two selected input channels The Crossfader Channel Assign switches determine which channels the crossfader will segue between 1234 3 12 O HHHH In this example Channel 1 is 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 The Split Cue Level controls what signal is being monitored through your headphones Move the slide control to the left an
12. or Polarization Precautions should be taken so that the grounding or polarization means built into the mixer is not defeated 12 Internal External Voltage Selectors Internal or external voltage selector switches if any should only be reset and re equipped with a proper plug for alternative voltage by a qualified service technician Do not attempt to alter this yourself NOTE This apparatus does not exceed the Class A Class B whichever is applicable limits for radio noise emissions from digital apparatus as set out in the radio interference regulations of the Canadian Department of Communications WARNING To reduce the risk of fire or electric shock do not expose this appliance to rain or 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 warranty card enclosed to register your mixer with us l IMODEL DM1720X PURCHASED FROM ISERIAL NUMBER DATE OF PURCHASE C Numark The Proven Leader in DJ Technology 1998 Numark Industries 2 http www numark com DM1720X NUMARK DM1720X STEREO MIXER INDEX Safety Information Page 2 Product Registration Introduction and Features Page 4 Precautions Page 5 Front Panel Diagram Page 6 Rear Panel Diagram Pag
13. s or other mixing consoles NOTE Plug mono audio sources into both Left and Right inputs using a Y cable connector 9 Phono Inputs on Channels 1 2 and 3use unbalanced RCA jacks Your input signal is fed directly to the DM1720X 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 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 Numark The Proven Leader in DJ Technology 1998 Numark Industries http www numark com DM1720X Instructions for Connection 1 Be sure the POWER 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 music sources on the rear of the unit Up to 3 phono and 8 line sources CD players cassette decks tuners etc can be connected 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 or on the back of the unit at
14. 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 turns the unit on and off Make sure your input faders 7 are turned down before you power up your mixer Numark The Proven Leader in DJ Technology 1998 Numark Industries http www numark com DM1720X DM1720X REAR PANEL DIAGRAM 1 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 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 Mic is the mic input for the Mic Channel 6 Mic is the mic input for the Mic on 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 synthesizer
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