VocoPro Headphones UHF 3800 User Manual

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Welcome!

Thank you for purchasing the UHF-3800 from VocoPro, your ultimate choice in

Karaoke entertainment! With years of experience in the music entertainment business,

VocoPro is a leading manufacturer of Karaoke equipment, and has been providing

patrons of bars, churches, schools, clubs and individual consumers the opportunity to

sound like a star with full-scale club models, in-home systems and mobile units. All our

products offer solid performance and sound reliability, and to further strengthen our

commitment to customer satisfaction, we have customer service and technical support

professionals ready to assist you with your needs. We have provided some contact

information for you below.

VocoPro

1728 Curtiss Court

La Verne, CA 91750

Toll Free: 800-678-5348

TEL: 909-593-8893

FAX: 909-593-8890

VocoPro Company Email Directory

Customer Service & General Information

[email protected]

Tech Support

[email protected]

Remember Our Website

Be sure to visit the VocoPro website www.vocopro.com for the latest information on new

products, packages and promo's. And while you're there don't fo rget to check out our

Club VocoPro for Karaoke news and events, chat rooms, club directories and even a

Service directory!

We look forward to hearing you sound like a PRO, with VocoPro, your ultimate choice in

Karaoke entertainment.

FOR YOUR RECORDS

Please record the model number and serial number below, for easy reference, in case of loss or theft. These numbers

are located on the rear panel of the unit. Space is also provided for other relevant information

Model Number

Serial Number

Date of Purchase

Place of Purchase

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Selecting fine audio equipment such as the unit you've just purchased is only the

start of your musical enjoyment. Now it's time to consider how you can maximize the

fun and excitement your equipment offers. VocoPro and the Electronic Industries

Association's Consumer Electronics Group want you to get the most out of your

equipment by playing it at a safe level. One that lets the sound come through loud

and clear without annoying blaring or distortion and, most importantly, without

affecting your sensitive hearing.

Sound can be deceiving. Over time your hearing "comfort level" adapts to a higher

volume of sound. So what sounds "normal" can actually be loud and harmful to your

hearing. Guard against this by setting your equipment at a safe level BEFORE your

hearing adapts.

To establish a safe level:

• Start your volume control at a low setting.

• Slowly increase the sound until you can hear it comfortably and clearly, and without

distortion.

Once you have established a comfortable sound level:

• Set the dial and leave it there.

• Pay attention to the different levels in various recordings.

Taking a minute to do this now will help to prevent hearing damage or loss in the

future. After all, we want you listening for a lifetime.

Used wisely, your new sound equipment will provide a lifetime of fun and enjoyment.

Since hearing damage from loud noise is often undetectable until it is too late, this

manufacturer and the Electronic Industries Association's Consumer Electronics

Some common decibel ranges:

Level

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.

The following noises can be dangerous under constant exposure:

Level

Example

100

120

140

180

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

-Information courtesy of the Deafness Research Foundation

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Microphone Basics

Microphone Position

The UHF-3800 is ideal for close-up vocals and can be held in the hand or mounted on a mic stand.The

most common applications and placement techniques are listed below. Keep in mind that microphone

technique is largely a matter of personal taste, there is no one "correct" microphone position.

Proximity Effect

When the sound source is less than 1/4 in. from the microphone, the microphone boosts bass

frequencies (by 6 to 10 dB at 100 Hz), creating a warmer and richer bass sound than when farther

away. This effect, known as proximity effect, happens only in unidirectional dynamic microphones

like the UHF-3800.

Feedback

Feedback occurs when the amplified sound from any loudspeaker reenters the sound system through

any open microphone and is amplified again and again and again. Most commonly, feedback is caused

by the following conditions: placing loudspeakers too close to microphones, having too many open

active microphones, boosting tone controls indiscriminately (mainly treble) and performing in areas

with high ratios of room surfaces that have hard and reflective surfaces such as glass, marble and

wood. What to do if feedback occurs before the sound system is loud enough?

• Request that the talker speak louder into the microphone.

• Reduce the distance from the talker to the microphone. Each time this distance is halved, the sound

system output will increase by 6dB.

• Reduce the number of open microphones.

• Move the loudspeaker farther away from the microphone. Each time this distance is doubled, the

sound system output can be increased by 6dB.

• Move the loudspeaker closer to the listener.

• Use an equalizer/feedback reducer to cut the frequency bands in which the feedback occurs.

Microphone Placement & Tone Quality

Lead & Backup Vocals

Lips should be less than 3" from or even touching the windscreen on an axis to the microphone.

Doing this creates a robust sound, emphasizes bass and provides maximum isolation from

other sources.

Speech

When giving a speech or simply speaking, place the microphone 4" to 10" away from the mouth, just

above nose height for a natural sound with reduced bass. You can also place the microphone

8" to 16" away from the mouth, slightly off to one side, for a more "distant" sound with highly

reduced bass and minimal "s" sounds.

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Front and Rear Panel Descriptions

1. POWER button - Turns the UHF-3800 ON/OFF.

2. POWER LED indicator - Glows BLUE when the receiver is powered ON.

3. RF/AF LED indicator - Lights RED when RF signals are received from the

microphone channels and output to external devices.

4. VOLUME controls - These controls adjust the VOLUME level for each MIC channel.

5. RF ANTENNAS - Provides RF SIGNAL reception to the RECEIVER.

6. 1/4" AUDIO OUT (MIXED A-B) - This ¼" unbalanced OUTPUT jack is for output

connection to amplifiers, effects devices or mixers. Both Mic channels are output

through this jack for mixed output.

7. XLR AUDIO OUT (SEPARATE A-B) - These XLR balanced OUTPUT jacks are for

output connections to amplifiers, effects devices and/or mixers. These are for

separate mic channel connections with unmixed mic output.

8. CHANNEL SELECTOR - This selects one of the four dual-channel frequency pre-sets. The receiver

and mics must all be set to the same pre-set. For example, if this is set to "1", both mics must

also have their channels set to "1" to work.

9. FUSE terminal - This terminal houses the system fuse. Only replace with same

type/rating of fuse.

10. VOLTAGE selector - Selects between 110-120V and 220-240V power settings.

11. AC POWER terminal - MAINS POWER jack for connection to a compatible

AC outlet.

Front and Rear Panel

8-Channel Dual UHF Wireless Microphone System

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1 0

1 1

BALANCED OUTPUT

CAUTION

L A V E R N E C A L IF O R N IA

U . S .

RISK OF ELECTRICAL SHOCK

DO NOT OPEN

AUDIO OUTPUT

UNBALANCED

8-Channel Dual UHF Wireless Microphone System

AC: 110V/240V

50/60Hz

IO NTO:REDUCE THE RISK OF

FIRE. REPLACE ONLY WITH THE SAME TYPE

AND RATING OF FUSE

IOUTNILI:SER UN FUSIBLE DE

RECHANGE DE MEMETYPE

VOLTAGE SELECTOR

AC110V AC240V

SERIAL NO:

FREQUENCY

1.5A

564.2-575.9Mhz

545.2-554.6Mhz

CHANNEL 1234

DC 12V 2A FUSE

AC INPUT

MIXED A/B

MIC-B

MIC-A

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Mounting

To install the UHF-3800 to a 19" rack case, complete the steps below.

1. Attach mounting brackets to the UHF-3800 via the supplied mounting screws.

2. Align the UHF-3800 with desired space in rack and slide in slowly, rear panel first.

NOTE: Depending on your rack case design, it may be necessary

to allow for sufficient space for the antennas.

3. While aligned, use rack case screws (not included) in the order shown below to stabilize the

UHF-3800 in its space, using the "X" rotation (numbered below) will ensure even tension

and plush alignment.

NOTE: Do not tighten screws firmly until all screws are in place.

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(See diagram below)

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BALANCED OUTPUT

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8-Channel Dual UHF Wireless Microphone System

SERIAL NO:

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AC240V

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1.5A

FREQUENCY

A: 564.2-575.9Mhz B: 545.2-554.6Mhz

CHANNEL 1234

DC 12V 2A FUSE

AC INPUT

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MIC-B

MIC-A

www.v ocopro .com

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8-Channel Dual UHF Wireless Microphone System

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Troubleshooting

Problems

Solutions

No sound output, RF/AF

LED(s) not glowing.

• Make sure the microphone and receiver power switches and

receiver are set to the ON position.

• Check microphone batteries to ensure that they are providing

sufficient power. Replace battery if necessary.

• Check receiver's AC power connection.

• Make sure antennas are firmly connected and extended to an

optimal position.

• 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/AF signal

LED's. If they glow, the problem is elsewhere in the sound system.

Received signal is noisy or

contains extraneous

sounds with the

• Check microphone(s) batteries and replace if charge is low.

• Remove local sources of UHF interference, such as

microphone(s) ON.

lighting equipment.

• Signal may be too weak. If so, reposition antennas. (If possible,

move them closer to the transmitter).

Noise coming from the

receiver with the

microphones turned OFF.

• Remove local sources of UHF interference, such

as lighting equipment.

• Reposition the receiver or antennas.

Momentary loss of sound as

microphone(s) are moved

throughout the operating

range.

• Reposition the receiver, perform a "walkthrough", and observe the

signal strengths. If audio dropouts persist, mark these "dead

spots" in the operating area and avoid them

during the performance.

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UHF-3800 Owner’s Manual version 2

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