Numark Industries DM900EX User's Manual
Contents
1. 5 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 6 The Tape Outputs are low impedance unbalanced RCA jacks which output the program mix and allow you to connect any recording device 7 The Stereo Master Outputs are low impedance RCA connectors controlled by the Master fader Numark The Proven Leader in DJ Technology 1998 Numark Industries 8 http www numark com DM900EX DM900EX CONNECTION DIAGRAM Sound System w Amplifier Numark The Proven Leader in DJ Technology 1998 Numark Industries 9 http www numark com DM900EX SPECIFICATIONS INPUTS Line 47kQ input impedance 100mV rms sensitivity for 1 22 V output Phono 47kQ input impedance 1 5 mV rms sensitivity 1 KHz for 1 22 V output OUTPUTS Line 7 2N rms max 19 dBm Headphone Amp 5 watt into 47Q Distortion less than 01 SIGNAL TO NOISE RATIOS vs maximum output Line Better than 88 dB Phono Better than 78 dB FREQUENCY RESPONSE Line 20 Hz 20k Hz 5 dB Phono 1 dB except for controlled attenuation of 3 dB 9 20 Hz to reduce rumble and feedback POWER CONSUMPTION 8 Watt typical 10 watt with full headphone output Numark The Proven Leader in DJ Technology 1998 Numark Industries 10 http www numark com DM900EX BLOCK DIAGRAM Numark The Proven Leader in DJ Technology 1998 Numark Indust2. Numark Professional Disc Jockey Products DM900EX OWNER S MANUAL i OOOCOCOOOCOOCOO dB 40 30 20 10 7 4 2 02 4 7 10 B C 8OOOOOOOO0O0O000 POWER DMSODEX DAI o e CUE CHTS Uc ooo GOD s ooo QOD R CH 1 CH 2 C pats NUMARK INDUSTRIES 11 Helmsman Road North Kingstown RI 02852 http www numark com DM900EX CONGRATULATIONS You have purchased the DM900EXStereo 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 DM900EX brings to you the finest quality of DJ equipment available today Thank you for buying Numark DJ products FEATURES e Compact design e User replaceable assignable ALPs crossfader e Gold Plated Connectors e 4 phono inputs e 2 switchable line inputs e Tape Out for direct recording e Powerful stereo headphone output e Selectable cueing e High end performance audio signal Numark The Proven Leader in DJ Technology 1998 Numark Industries 2 http www numark com DM900EX NUMARK DM900 STEREO MIXER INDEX Introduction Page 2 Features Safety Information Page 4 Product Registration Precautions Page 5 Front Panel Diagram Page 6 Rear Panel Diagram Guided Tour of Features Page 7 Operating Instructions Connection Diagram Page 9 Specifications Page 10 Block Diagram Page 11 Warranty and Service Page 12 Numark The Pro
3. al Take the DM900 to your dealer or to an authorized Numark Service Center A NOTE ON CABLES Make the input and output connections with readily available low capacitance stereo cables Quality cable makes a big difference in audio fidelity and punch See your Numark dealer or an electronics or audio specialist store if you are not sure which cables to get DM900EX 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 e 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 f
4. are ready to switch it on 1 Power Switch and Power On LED The DM900 is divided into five functional blocks Input Crossfader Monitoring and Master Output It is important to learn how each of these work CHANNEL INPUTS SECTION 2 Channels 1 amp 2 Input Toggle Switches select which source will be live to that channel based on what you have connected to the rear panel input section 3 The Input Faders are low noise low impedance high quality smooth Alps faders These control individual source levels in the mix CROSSFADER SECTION 4 The Replaceable Crossfader achieves clean segues between the two input channels t Hard left selects Channel 1 Hard right selects Channel 2 With the crossfader centered both assigned channels are live Use the crossfader for fast and seamless segues from one selected channel to the other Note The crossfader is user replaceable in case of failure Simply unscrew the two large screws which hold it in place lift it out and disconnect it s cable Re attach the new crossfader and screw the mounting plate back onto the unit you re back in business MONITOR SECTION 5 Channel Cue Assign The Cue selector is used to route channel audio to the Monitor Section The channel faders do not control the Cue volume 6 Headphone Volume controls the output level to the Headphone Jack located on the front panel of the mixer Connect headphones with a standard 1 4 stereo p
5. d 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 from a 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 or Polarization Precautions should be taken so that the grounding or polarization means built into the mixer is not defeated 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 regulat
6. ions 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 MODEL DM900 PURCHASED FROM SERIAL NUMBER DATE OF PURCHASE Numark The Proven Leader in DJ Technology 1998 Numark Industries 4 http www numark com IMPORTANT INFORMATION Please read this entire manual before connecting the DM900 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 manu
7. lug The Cue audio is sent to the headphone amp using the Cue Assign Selector MASTER OUTPUT SECTION 7 The Stereo Master Fader controls the Master output level 8 The LED METER indicates the Master output level Numark The Proven Leader in DJ Technology 1998 Numark Industries 7 http www numark com DM900EX REAR PANEL INPUTS AND OUTPUTS Please refer to diagram on page 7 1 Power Input Plug your external power supply into here See safety precautions on page 3 for proper treatment of the power cord 2 GND is the grounding lug for all turntables Always use this connection your turntable cable should have a grounding wire 3 Phono Inputs on Channels 1 2 and 3use unbalanced RCA jacks Your input signal is fed directly to the DM900 s high quality RIAA phono pre amplifiers so use this position only for moving magnet cartridges Line level sources will overload the sensitive phono pre amps and will sound very bad so always be sure to toggle the line phono switch over to line before connection of line sources 4 Channels 1 amp 2 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 audio sources into both Left and Right inputs using a Y cable connector
8. ries 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 defaced or changed nor to accessories used therewith not of our own manufacture Numa
9. rk 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 1 401 946 4700 North Kingstown RI 02852 U S A Fax 1 401 946 5350 Attention Service Department E mail numark numark com
10. ront 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 DM900EX DM9OOEX FRONT PANEL DIAGRAM OOOOOOOCOOOOO 1 OOOOOOOOOOOO c e 2 oQ ww Q 95 2 2 Q9 3 E a DM9OOEX REAR PANEL DIAGRAM Numark The Proven Leader in DJ Technology 1998 Numark Industries 6 http www numark com DM900EX GUIDED TOUR OF FEATURES AND OPERATING INSTRUCTIONS If the DM900 is your first mixer please read this entire manual before you begin operation If you are an experienced DJ simply replace your old mixer The DM900 can be rack mounted or used as a free standing unit four 6 rack unit spaces INSTALLATION AND OPERATION Study the Connections Diagram on page 13 First connect all stereo input sources Next connect your monitor headphones Make sure all faders are at zero and the unit is off Finally connect the stereo outputs to the power amplifier s and or audio sources Plug the DM900 into it s power supply and plug this into power Now you
11. ven Leader in DJ Technology 1998 Numark Industries 3 http www numark com DM900EX Safety Information and Product Hegistration N RISK OF ELECTRIC SHOCK 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 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 EXPOSURE 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 an
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