Numark Industries DJ Equipment DJ 18 User Manual

Professional Disc Jockey Products  
DJ-18 STEREO MIXER  
OWNER’S MANUAL  
NUMARK INDUSTRIES  
11 Helmsman Road, North Kingstown RI 02852  
 
DJ 1 8  
6. Heat - Avoid placing this product too close to  
any high heat sources such as radiators.  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
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.  
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.  
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.  
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.  
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.  
CAUTION  
FOR USA & 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.  
11. Grounding or Polarization - Precautions should  
be taken so that the grounding or polarization  
means built into the mixer is not defeated.  
S AFETY INS TRUCTIONS  
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.  
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.  
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.  
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.  
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.  
5. Water and Moisture - This product should be kept  
away from direct contact with liquids.  
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: DJ18  
PURCHASED FROM:_________________________  
SERIAL NUMBER:__________________ DATE OF PURCHASE:________________________  
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NUMARK DJ18 STEREO MIXER  
INDEX  
Safety Information  
Product Registration  
Page 3  
Page 5  
Introduction  
Features  
Precautions  
Page 6  
Page 7  
Page 7  
Front Panel Diagram  
Guided Tour of Features  
Operating Instructions  
Rear Panel Diagram  
Connection Diagram  
Specifications  
Page 11  
Page 13  
Page 14  
Page 15  
Page 16  
Block Diagram  
Warranty and Service  
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CONGRATULATIONS!  
You have purchased the DJ18 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 DJ18 brings to you the finest quality of  
DJ equipment available today.  
Thank you for buying Numark DJ products!  
FEATURES...  
Mixer features include:  
• User replaceable assignable ALPs™ crossfader  
• 5-band graphic equalizer with In/Out switch  
• Master and Booth level controls  
Neutrik™ “Combo” connector allows 1/4” or XLR plug  
to be used for DJ Mic  
• Dedicated DJ Mic and Second Mic Channel with 2 Band EQ  
and Talk-over dual control  
• Split cue headphone monitoring with cross-fader  
• Stereo/Mono switch on the Master  
• Tape Out for direct recording.  
• Powerful stereo headphone output  
• Push button cueing  
• High-end performance audio signal  
• 12V BNC light connector  
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IMPORTANT INFORMATION...  
Please read this entire manual before  
connecting the DJ18 to your system.  
For optimum performance:  
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.  
• 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.  
• 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.  
• 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.  
• 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.  
• Never attempt to make any adjustments or repairs  
other than those described in this manual. Take the  
DJ18 to your dealer or to an authorized Numark  
Service Center.  
• Use restraint when operating controls. Try to  
move them slowly. Rapid adjustments could  
damage speakers due to amplifier clipping.  
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.  
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!  
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DJ18 FRONT PANEL DIAGRAM...  
1 9  
7
1 3  
1 2  
1
2 0  
1 5  
1 1  
9
2
1 0  
1 6  
3
1 7  
1 8  
8
5
1 4  
6
4
GUIDED TOUR OF FEATURES AND  
OPERATING INSTRUCTIONS...  
CROSSFADER SECTION  
4. The Crossfader Assign knob to the left of the  
crossfader lets you choose which input channel will be  
heard when the crossfader is in the far left position.  
Please read this entire manual before you begin operation.  
INSTALLATION AND OPERATION  
Study the Connections Diagram on page 13. First,  
connect all stereo input sources. Next connect your  
microphone(s) and 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 DJ18 into AC power. Now you are ready  
to switch it on.  
5. The Replaceable Crossfader achieves clean  
segues between the two selected input channels.  
Off1 2 3  
Off1 2 3  
"Hard left" selects the channel set up of the Assign Left  
knob. In this example it is Channel 1. "Hard right" selects  
the channel set up on the Assign Right knob. In this  
example it is Channel 3. With the crossfader centered both  
assigned channels are live. Use the crossfader for fast and  
seamless segues from one selected channel to the other.  
To turn off the crossfader simply turn both knobs all the  
way to the left.  
The DJ18 is divided into five functional blocks: Input,  
Crossfader, DJ Mic, Master/Zone Output, and Equalizer. It  
is important to learn how each of these work.  
CHANNEL INPUTS/CONTROLS SECTION  
1. Channels 1, 2, & 3 Input Toggle Switches  
select which source will be live to that channel based on  
what you have connected to the rear panel input section.  
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!  
2. The Input Faders are low-noise, low-impedance, high-  
quality, smooth Alps™ faders. These control individual  
source levels in the mix.  
3. Channel Cue Assign. The Cue pushbuttons are  
used to route channel audio to the Monitor Section.  
The channel faders do not control the Cue send volume.  
6. The Crossfader Assign knob to the right of the  
crossfader lets you choose which input channel will be  
heard when the crossfader is in the far right position.  
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DJ MIC SECTION  
MASTER/BOOTH OUTPUT SECTION  
The DJ18 has an extremely flexible DJ Mic channel. The  
Talkover function reduces the level of the music while  
leaving the DJ Mic at normal volume.  
12. The Stereo Master Fader controls the overall  
output level.  
13. Stereo/Mono toggle adjusts the Master output for  
7. Neutrik™ “Combo” connector allows connection of  
either a 1/4” jack or an XLR jack for the DJ Mic 1. This is  
ideal for connecting an XLR gooseneck directly into the  
mixer.  
the operation selected.  
14. The Booth Level controls speaker volume for a  
remote zone or booth monitors. If you do not use booth  
monitors the output can feed a tape deck, another  
amplifier, another mixer or a satellite speaker system.  
Note: This can also be used to supply line level audio to a  
lighting controller or to lights that are sound activated.  
8. Treble and Bass Controls fine tune the tone of  
your voice on both mics through the sound system. The  
controls are detented for setting tone "flat". For best  
results, use a dynamic cardioid microphone.  
CONTRACTOR'S NOTE: Booth Level provides  
zone control in installations where there are two separate  
rooms, or a bar and dance floor, for example. Remote zone  
volume should be controlled from the DJ18.  
9. The DJ Mic 1 Fader controls the DJ Mic volume for  
the Neutrik™ “Combo” connector.  
10. The Mic 2 Fader controls the Mic volume for the  
1/4” connector on the rear of the mixer.  
15. Stereo Auto Peak Hold Level Indicator. This  
fast, accurate stereo meter tracks the output level. The red  
LEDs for +3dB, +5dB and +8dB hold program peaks for a  
second or two. With peak metering, it's OK to be "in the  
red" as long as +5dB or +8dB aren't constantly lit. Set the  
crossover, equalizer and power amp inputs to avoid  
distortion at each step in the audio chain. Proper attention  
to the peak meter results in the punchiest possible sound  
without audible distortion.  
11.Mic Off/On/Talkover Switch.  
Off turns off Mic 1  
O n turns on Mic 1  
Talkover turns down the input level of your music  
sources from Channels 1-4.  
Talkover is very useful for making announcements without  
adjusting any levels.  
Try using this feature for audience participation  
when you want the music to temporarily cease  
and the audience to be heard - “YEAH!”  
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EQUALIZER SECTION  
GENERAL EQ HINTS  
16. 5-Band Stereo Graphic Equalizer (EQ). EQ  
compensates for differences in source material sound  
quality. In ultra-compact mobile systems this EQ can be  
used to tailor the sound to the acoustical requirements of  
the room. Center frequencies are 63Hz, 250Hz, 1kHz,  
4kHz and 16kHz. Faders have a center detent for an  
accurate "flat” response.  
• Boost the 63Hz band for deep bass tones and solid kick  
drum sound. Use sparingly because this dramatically  
increases demand on power amplifiers and could drive  
them into “clipping” .  
• Cut slightly at 250Hz and more at 1kHz for extra clarity.  
Note: Cutting is preferable to boosting.  
• Boost 16kHz for a little "sizzle".  
Below is a typical "house" EQ curve. Notice how the knobs  
above "0" balance out the knobs below. Start with this  
setting if you've never used a graphic EQ before:  
• As a general rule, less equalization is better!  
17. Equalizer On/Off. This controls whether your final  
output will be routed through the EQ or not.  
0
MONITOR SECTION  
18. The Monitor section includes the Program Mix  
control, the Headphone Volume control and the  
Headphone Jack. Connect headphones with a  
standard 1/4" stereo plug. The Cue audio is sent to the  
headphone amp using the Cue Assign Pushbutton  
and the Pgm Mix control. The Program Mix controls  
the amount of program audio in the headphones so that  
beats can be matched exactly and segues are smooth  
when a song is cued.  
Below is an example of a poor EQ curve because it cuts the  
output volume down by 6-10dB. You have to compensate  
by running the Master output higher:  
0
Below is the worst sort of curve to use because you are  
using EQ to add volume. With exaggerated boost you can  
easily run your power amplifiers into “clipping” and damage  
your speakers.  
19. 12V BNC Connector allows a 12 volt gooseneck  
lamp to be connected directly to the mixer. This light is  
readily available from your Numark dealer.  
20. Power Switch and Power-On LED.  
0
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DJ18 REAR PANEL DIAGRAM...  
1
6
2
7
7
7
8
7
8
4
5
3
REAR PANEL: INPUTS AND OUTPUTS  
1. AC Cord. See safety precautions on page 3 for  
proper treatment of the power cord.  
7. Channels 1-3 Line Inputs are unbalanced RCA  
jacks. The Line Input is selected with the toggle  
switch on the front panel.  
2. GND is the grounding lug for turntables 1 and 2  
(phono inputs on Channels 1 and 2). Always use this  
connection (your turntable cable should have a  
grounding wire).  
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.  
3. The Stereo Main Outputs are low-impedance  
RCA connectors controlled by the Master fader.  
NOTE: Plug mono audio sources into both Left and  
Right inputs using a “Y” cable connector.  
4. The Stereo Zone Outputs are low-impedance  
unbalanced RCA jacks controlled by the Zone Level  
control.  
8. Phono Inputs on Channels 1 and 2 use  
unbalanced RCA jacks. Your input signal is fed directly  
to the DJ18'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.  
5. The Tape Outputs are low-impedance  
unbalanced RCA jacks which output the program mix  
and allow you to connect any recording device.  
6. Mic 2 is a high-impedance 1/4” input.  
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DJ18 CONNECTION DIAGRAM...  
Microphone 2  
Turnt able 1  
Tape Deck  
AC  
Out le t  
Zone  
Tape Deck  
Sound Syst e m  
w/ Am p lifie r  
CD Pla ye r  
Turnt able 2  
Ma in  
Sound Syst e m  
w/ Am p lifie r  
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SPECIFICATIONS...  
INPUTS:  
Line:10kWinput impedance  
80 mV rms sensitivity (for 1.22 V output)  
Mic: 10kWinput impedance balanced/unbalanced  
2.5 mV rms sensitivity (for 1.22 V output)  
500 mV rms max input  
Phono:47kWinput 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 47W  
Distortion less than .01%  
EQUALIZER:  
5-Band Stereo Graphic EQ  
Band centers 63Hz, 250Hz, 1KHz, 4KHz, 16KHz +/- 12 dB  
SIGNAL TO NOISE RATIOS (vs. maximum output):  
Line:  
Mic:  
Phono:  
Better than 85 dB  
Better than 72 dB  
Better than 83 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  
TALKOVER ATTENUATION:  
variable from no cut to -16 dB  
POWER CONSUMPTION:  
20 Watt typical, 28 Watt with full headphone output  
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BLOCK DIAGRAM...  
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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 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 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  
North Kingstown, RI 02852 USA  
Attention: Service Department  
Telephone: +1 (401) 295-9000  
Fax: +1 (401) 295-5200  
 

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