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Professional Disc Jockey Products
DM 1820X STEREO MIXER
OWNER’S MANUAL
NUMARK INDUSTRIES
11 Helmsman Road, North Kingstown RI 02852 http://www.numark.com
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DM1820X Numark - The Proven Leader in DJ Technology ©1997 Numark Industries 2 http://www.numark.com
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DM1820X 6. Heat - Avoid placing this product too close to CAUTION any high heat sources such as radiators. RISK OF ELECTRIC SHOCK 7. Power Sources - This product should be DO NOT OPEN connected to a power supply only of the type described in these operating instructions, or as CAUTION: TO REDUCE THE RISK OF ELECTRIC marked on the unit. SHOCK DO NOT REMOVE ANY COVER. NO USER- SERVICEABLE PARTS INSIDE. REFER SERVICING TO 8. Power Cord Protection - Power supply cords QUALIFIED SERVICE PERSONNE
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DM1820X NUMARK DM1820X STEREO MIXER INDEX Safety Information Page 3 Product Registration Introduction and 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 DJ Technology ©1997 Numark Industries 4 http://www.numark.com
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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 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 product
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DM 1820X 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 DJ Technology ©1997 Numark Industries 6 http://www.numark.com
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DM1820X IMPORTANT INFORMATION... Please read this entire manual before connecting the DM1820X to your system. For optimum performance: SYSTEM PRECAUTIONS • Use appropriate cables throughout your • Always make sure that AC power is OFF system: Quality shielded audio cables and while making any connections. terminated shielded video cables, low- capacitance preferred. Speaker cables must be • Do not use excessively long cables (i.e. over 14-gauge minimum; 12- or 10-gauge is better. 50ft/14m) Be s
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DM 1820X DM1820X FRONT PANEL DIAGRAM... 22 21 23 1 19 2 20 3 4 5 6 18 16 17 7 8 11 12 13 14 9 10 15 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 0dB to -20dB. Use
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DM1820X 9. The Crossfader In/Out Pushbutton defeats the leaving the other frequencies playing. This area is always entire Crossfader function but leaves the Kill functions active even when the crossfader is not. Try that for a neat active. effect, or mix one channel’s treble with another channel’s bass (by cutting the mid and bass on the first channel and 10. Crossfader/Kill Assign Switches lets you choose the treble and mid on the other channel.) which input channel will be heard when the Cros
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DM 1820X Numark - The Proven Leader in DJ Technology ©1997 Numark Industries 10 http://www.numark.com
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DM1820X DM1820X REAR PANEL DIAGRAM... 11 8 8 12 6 10 1 4 2 3 5 7 7 7 9 7 9 7 9 1. The Balanced Main Outputs are low-impedance 8. Line/Phono Input switch. Use this to allow line XLR type connectors controlled by the Master fader. level equipment to be plugged into your phono inputs giving you a total of 8 line input options. 2. The Stereo Main Outputs are low-impedance RCA connectors controlled by the Master fader. 9. Phono Inputs on Channels 1, 2 and 3 use unbalanced RCA jacks. Your input signa
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DM 1820X 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 music sources on the rear of the unit. Up to 3 phono and 8 line sources (CD players, cassette decks, tuners, etc.) can
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DM1820X DM1820X CONNECTION DIAGRAM... Tape Deck Zone 1 Sound System w/ Amplifier Sampling Keyboard Turntable 1 Zone 2 Sound System w/ Amplifier AC Outlet Microphones Turntable 2 Tape Deck Main Sound System Dual CD Player Turntable 3 CD Player w/ Amplifier Numark - The Proven Leader in DJ Technology ©1997 Numark Industries 13 http://www.numark.com
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DM 1820X SPECIFICATIONS... INPUTS: Line: 10kΩ input impedance 100 mV rms sensitivity (for 1.22 V output) Mic: 10kΩ input impedance balanced/unbalanced 3 mV rms sensitivity (for 1.22 V output) 50 mV rms max input Phono: 47kΩ input impedance 1.5 mV rms sensitivity @ 1 KHz (for 1.22 V output) OUTPUTS: Line: 9V rms max (+20 dBm) Headphone Amp: 5 watt into 47Ω 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
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DM1820X BLOCK DIAGRAM... Numark - The Proven Leader in DJ Technology ©1997 Numark Industries 15 http://www.numark.com
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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 repa
