Emerson WM340 User manual

Before operating this product,
please read these instructions completely.
User's Guide
MODEL:
WM340
4-CHANNEL VHF PROFESSIONAL
Wireless
Microphone System

WARNINGS
This symbol is intended to inform you
that important operating and
maintenance instructions are included in
the literature accompanying this product.
This symbol is intended to alert you to
the presence of uninsulated dangerous
voltage within the product's enclosure
that might be of sufficient magnitude
to constitute a risk ofelectric shock. Do
not open the product's case.
INTRODUCTION
Safety Instruction
Listening for a Lifetime
Specifications
Descriptions and Controls
Microphone
Front Panel
Rear Panel
Operations
Operating the System
Getting Connected
Troubleshooting
Problems and Solutions
Feedback
CONTENTS
WM340
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WARNING: TO REDUCE THE RISK OF FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS PRODUCT TO RAIN OR
MOISTURE.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO PREVENT THE RISK OF
ELECTRICK SHOCK, NO NOT REMOVE COVER OR BACK.
NO USER-SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED PERSONNEL.
UTMIXT100
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System

E2
1. Read Instructions - All the Safety and Operating Instructions should be read before the
appliance is operated
2. Retain Instructions - The safety and operating instructions should be retained for future
reference
3. Heed Warnings - All warnings on the appliance and in the operating instructions should
be adhered to.
4. Follow Instructions - All operating and use instructions should be followed
5. Attachments - Do not use attachments not recommended by the product manufacturer
as they may cause hazards.
6. Water and Moisture -Do not use this Wireless Microphone near water. For example, near
a bathtub or in a wet basement and the like.
7. An appliance and cart combination should be moved with care. Quick stops, excessive force
and uneven surfaces may cause an overturn.
8. Ventilation - The appliance should be situated so its location does not interfere with its
proper ventilation. For example the appliance should not be situated on a bed ventilation
slots
9. Heat - The appliance should be situated away from heat sources such as radiators, heat
registers stoves, or other appliances (including amplifiers) that produce heat.
10. Power sources - The appliance should be connected to a power supply only of the type
described in the operating instructions or as marked on the appliance.
11. Grounding or Polarization - Precautions should be taken so that the grounding or
polarization means of an appliance is not defeated
12. Power-Cord Protection - Power-supply cords should be routed so that they are not likely
to be walked on or pinched by items placed upon or against them playing particular attention
so cords at plugs convenience receptacles and the point where they exit from the appliance
13. Cleaning -Unplug this unit from the wall outlet before cleaning. Do not use liquid cleaners
or aerosol cleaners. Use a damp cloth for cleaning
14. Power lines - An outdoor antenna should be located away from power lines
15. Nonuse Periods - The power cord of the appliance should be unplugged from the outlet
when left unused for a long period of time
16. Object and Liquid - Entry Care should be taken so that objects do not fall and liquids are
not spilled into the enclosure through openings
17. Damage Requiring Service - The appliance should be serviced by qualified service personnel
when:
A. The power supply cord or plug has been damaged ; or
B. Objects have fallen into the appliance ; or
C. the appliance has been exposed to rain ; or
D. The appliance does not appear to operate normally or exhibits a marked change in
performance ;or
E. The appliance has been dropped or the enclosure damaged.
18. Servicing - The user should not attempt to service the appliance beyond that described
in the operating instructions All other should be referred to qualified service personnel
SAFETY INSTRUCTIONS:
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340

E4
LISTENING FOR A LIFETIME
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340
Congratulations on purchasing this fine audio product. We want your audio experience to be
fun and exciting, without damage to your health. Take a little time to understand how to
operate your product at safe levels and avoid hearing damage to yourself and others. Proper
use will protect your product and yourself.
Sound can be deceiving. Over time your hearing comfort level adapts to a higher volume of
sound. What may have started out as uncomfortable loudness has become tolerable. Although
your tolerance may have increased, your hearing is still be exposed to harmful levels.
Prolonged exposure to harmful levels will cause damage that cannot be repaired. Now what
sounds normal can actually be loud and harmful. Guard against this by setting your equipment
at a safe level BEFORE your hearing adapts.
Establish safe levels of sound by always starting with your volume set to low, then gradually
increase to comfortable levels. If you hear distortion in the sound, it's a good indication your
equipment is being pushed to its limits and the volume is too high.
Used wisely, your sound equipment will provide a lifetime of fun and enjoyment. Hearing
damage from loud noise is often undetectable until is too late. This manufacturer and the
Electronic Industries Association’s Consumer Electronics Group recommend you avoid
prolonged exposure to excessive noise. Below is a list of sound levels and their decibel ratings.
This can help you understand the difference between healthy and unhealthy exposure to
sound.
Example
Subway, Motorcycle, Truck traffic, Lawn mower
Garbage truck, Chainsaw, Pneumatics drill
Rock band concert in front of speakers
Gunshot blast, Jet plane
Rocket launching pad
The following Noises can be dangerous under constant exposure:
Level
90
100
120
140
180
-Information courtesy of the Deafness Research Foundation
Example
Quiet library, Soft whispers
Living room, Refrigerator, Bedroom away from traffic
Light traffic, Normal conversation
Air conditioner at 20 ft, Sewing machine
Vacuum cleaner, Hair dryer, Noisy restaurant
Average city traffic, Garbage disposals, Alarm clock at 2 ft.
Level
30
40
50
60
70
80

E5
1.Comprehensive Performance
Carrier frequency VHF175-216MHz
Frequency Stabilization : > ±30ppm
Dynamic range: > 90dB
Total harmonic distortion: < 0.5%
Frequency response: 40hz-18khz ±3dB
Audio output level separate type: 0-±400mV mix type 0-±200mV
2.Fixed Receiver
Power supply AC12V/350mW
Consume power 5 Watts
Signal /noise power > 80dB
Signal /noise ratio > 80dB
Image &spurious rejection > 80dB
Receiving sensitivity < 5dBuv (SINAD=20dB)
3.Handing Microphone
Transmitter power 20mW
Modulation type VHF
Max deviation ±20KHz
Spurious emission > 40dB (with carrier)
Battery Voltage 9V battery (included 2 pcs.)
Continuous play 6 hours ( Alkaline)
SPECIFICATIONS
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340

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DESCRIPTIONS AND CONTROLS
1
2
1 1
24 4 6
5 5
4 43
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340
Microphone (Transmitter)
1. The microphone grill protects the delicate microphone cartridge. Inside the grill is a foam
windscreen that helps reduce ambient noise like wind and breathing and also helps keep the
internal components free of dirt or foreign material.
2. The battery cover can be removed by unscrewing it to expose the battery inside. Keep battery
cover tight to maintain proper battery connection. Caution: overtightening plastic battery cover
may cause damage to microphone body.
Receiver (Receives signal from transmitters)
Front Panel Controls
1. Antennas A,B,C,D to match the corresponding microphone's frequency setting. Each
microphone has a unique frequency so as not to interefere with each other.
2. Power Switch: Turns receiver On/Off
3. Echo Switch: Adjust the level of the echo function.
4. Volume controls A,B,C,D are for adjusting each microphone's volume. Individual control allows
for a better mixing of various singer voice levels.
5. Microphone input jacks (6.3mm) for adding two more corded microphones for a potential
mixing of six microphones.
6. Microphone volume control for corded microphones. Both microphones share one volume
control allowing for five mixing controls on the receiver.

4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340
DESCRIPTIONS AND CONTROLS
2 3 41
Rear Panel Controls
1. MIC UNBALANCED OUTPUT: Audio out (6.3mm) to amplifier.
2. XLR BALANCED OUTPUTS: Individual XLR outputs to mixer.
3. RCA Jacks: Audio/Video inputs/outputs. Accept input from DVD players, MP3 players, iPod®, etc.
Output to TV, stereo, amplifiers, powered speakers, etc.
4. DC12V: Connect supplied 120V/12VDC adaptor to this jack.

E8
1. Turn the receiver POWER switch On.
2. Turn the microphone(s) on by rotating the power knob to On. The red LED light will glow,
then go out. This is normal.
3. Talk or sing into the microphone(s) and adjust the volumes until you reach the desired
output level. Adjust echo control accordingly.
4. Tips for achieving optimum performance
- It's easiest to adjust volumes with two people. To avoid feedback,have one person stand
away from receiver and speakers while second person adjusts volumes and echo.
- Place the receiver at least 3 feet above the ground and away from concrete walls or metal
surfaces to prevent frequency reflections or interference. The microphone(s) should also be
at least 3 feet away from the receiver antennas.
- If using multiple wireless systems, maintain a distance of at least 10 feet from each other.
- Maintain a line-of-sight between the microphone and receiver antennas.
- Avoid placing the receiver near computers or radio frequency generating equipment.
- Extend the telescopic antennas to full length.
- Position the microphone close to your mouth and move accordingly for achieving desired
sound results.
- Move the microphone closer to your mouth for extra bass response.
- Use only one microphone per person.
- Keep microphone(s) away from sound-reflecting surfaces.
- Add a windscreen when using the microphone outdoors or for close-up speech.
Windscreens are also spit guards.
- Avoid excessive handling to minimize mechanical noise.
- Exercise patience when setting controls. They are delicate and will have to be adjusted for
different music or singer voice types.
OPERATING THE SYSTEM
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340

GETTING CONNECTED
E9
Connecting the WM-340
To get your systems up and running in just a few minutes, follow the quick start instructions
on this page.
1. Connect the AC power adapter to the receiver power then plug the adaptor into an electrical
outlet.
Audio/Video Out from DVD Player
RLVIDEO RLVIDEO
Television
RLVIDEO
To Audio In
RECEIVER OR HOME STEREO
To Video In
RL
or
LRVIDEO
RL
RL
To Audio In
RECEIVER OR HOME STEREO
RL
iPod Cable
Connecting to DVD Player and TV/Stereo
Connecting to iPod Video and TV/Stereo
RCA out of DVD player to WM340 IN. RCA cable out of WM340 to TV and Stereo IN.
iPod 3.5 headphone Jack to WM340 IN. RCA cable out of WM340 to TV and Stereo IN.
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340
MIC OUT BALANCE.D BALANCE.D BALANCE.D BALANCE.D
AUDIO R AUDIO L VIDEO
AUDIO R AUDIO L VIDEO
INPUT
FROM DVD
OUTPUT
TO TV /
STEREO
DC 12V
Rear panel
MIC OUT BALANCE.D BALANCE.D BALANCE.D BALANCE.D
AUDIO R AUDIO L VIDEO
AUDIO R AUDIO L VIDEO
INPUT
FROM DVD
OUTPUT
TO TV /
STEREO
DC 12V
Rear panel

GETTING CONNECTED
E10
Connecting to MP3 and Stereo
Connecting to Karaoke CDG and CD player
Rear panel
RL
RL
To Audio In
RECEIVER OR HOME STEREO
MP3 Player Cable
MP3 Player
MP3 Player 3.5 headphone Jack to WM340 IN. RCA cable out of WM340 to TV and Stereo IN.
1/4 inch Jack Plug out of back of WM340 to mic input on Karaoke Machine.
Rear panel
Karaoke CDG and CD Player
Mic Input
Microphone Battery Installation
Rotate a battery door on the bottom until open, and replace a 9v batteries.
9v Batteries
battery door
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340
MIC OUT BALANCE.D BALANCE.D BALANCE.D BALANCE.D
AUDIO R AUDIO L VIDEO
AUDIO R AUDIO L VIDEO
INPUT
FROM DVD
OUTPUT
TO TV /
STEREO
DC 12V
MIC OUT BALANCE.D BALANCE.D BALANCE.D BALANCE.D
AUDIO R AUDIO L VIDEO
AUDIO R AUDIO L VIDEO
INPUT
FROM DVD
OUTPUT
TO TV /
STEREO
DC 12V

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TROUBLESHOOTING
PROBLEMS
No sound: Receiver RF light (s)
and Mic (s) not lit
No Receiver sound but the RF
and Audio Level meter lights are
glowing
Receiver signal is noisy or contains
Interference with transmitter on.
Noise coming from the Receiver
with the Mics turned OFF
Momentary loss of sound as
Transmitter Is moved around
performing area.
SOLUTIONS
Make sure POWER switches on transmitters
and receiver are set to ON positions .
Check microphone batteries to ensure they are
providing power. Replace battery if necessary.
Check receiver's AC power connection. Make
sure antennas are In the microphones's line
of sight. If necessary, reduce the distance
between the microphones and receiver
Turn up the Receiver's VOLUME level controls.
Check for proper connection between receiver
and external amplifier /mixer.
Talk into the Microphone and observe the
Receiver's RF signal LEDs, If they glow, the
problem is elsewhere in the sound system
Check Microphone batteries or replace if power
is low. Remove local sources of RF interference,
such as lighting equipments, Two transmitters
may be operating at the same frequencies or
frequencies which are too close in proximity.
Turn one off or exchange for one with a different
antenna.
(If possible, move them close to the transmitter)
Remove local sources of RF interference,
such as Lighting equipment.
Reposition the Receiver or Antennas.
Reposition receiver and perform a "walkthrough"
test and observe the signal strengths, If audio
dropouts persist, mark these "dead spots" in the
performing areas and avoid them during the
performance.
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340

E12
FEEDBACK
PRINTED IN CHINA
4-CHANNEL VHF PROFESSIONAL-Wireless Microphone System
WM340
Feedback happens when a microphone is placed close to a speaker. The amplified sound waves
coming from the speaker enter the microphone which sends that sound back for more amplification.
Amplification rises quickly and creates annoying howl or screach.
Feedback is caused by the following conditions:
• Placing microphone too close to the speaker(s).
• Having too many open and active microphones.
• High-frequency tone controls adjusted too high.
• Performing in environments with high ratios of hard and reflective room surfaces.
Prevent feedback by:
• Requesting the singer or speaker project their voice louder into the microphone allowing for a lower
master volume.
• Reduce the distance from microphone and lips. Each time this distance is halved, the sound system
output will increase approximately 6dB, mostly in the low-frequency range.
• Reduce the number of open microphones.
• Move the speaker(s) closer to the listeners.
• Use an equalizer/feedback reducer to cut the offending frequency bands.
Important: Every wireless microphone installation is a unique situation and can present a variety of
problems. Never attempt a live performance without first testing entire system in the performing area.
If changes are made, retest system again. Audiences are always more receptive if the show starts on
time without technical difficulties.
6365 53rd Street North Suite B Pinellas Park, FL 33781 USA
http://www.emersonkaraoke.com
1-800-800-8466
EMERSON AND THE G-CLEF LOGO ARE REGISTERED TRADEMARKS
OF EMERSON RADIO CORP.,
PARSIPPANY, NEW JERSEY, U.S.A.,
USED UNDER LICENSE