Digital-Quad-H3 - Audio Amplifier Vocopro - Free user manual and instructions

Product Type	Audio Amplifier
Brand	Vocopro
Model	Digital-Quad-H3
Number of Channels	4
Power Output (per channel RMS)	150W @ 4 ohms
Total Power Output	600W
Frequency Response	20Hz – 20kHz ±0.5dB
Total Harmonic Distortion (THD)	< 0.05%
Input Impedance	10kΩ (balanced), 20kΩ (unbalanced)
Input Connectors	4x XLR–1/4" combo, 2x RCA
Output Connectors	4x SpeakON, 4x 1/4" TS
Cooling System	Variable speed fan
Power Supply	100–240V AC, 50/60Hz
Dimensions (W x H x D)	19" x 3.5" x 12" (483 x 89 x 305 mm)
Weight	15 lbs (6.8 kg)
Rackmount	2U, rack ears included
Protection	Short circuit, thermal, overload, DC offset
Cleaning Instructions	Wipe with a dry cloth; do not use liquids or solvents
Safety Precautions	Unplug before cleaning; do not expose to moisture
Spare Parts & Repairability	Contact Vocopro customer service for parts and repairs
Intended Use	Karaoke, live performances, PA systems

Frequently Asked Questions - Digital-Quad-H3 Vocopro

How do I connect microphones to the Digital-Quad-H3?

Use the XLR inputs on the combo jacks. Each channel has a combo jack accepting XLR or 1/4" TS/TRS. For dynamic microphones, use XLR cables.

What is the maximum speaker load per channel?

Each channel is rated for 150W RMS at 4 ohms. You can connect an 8 ohm speaker as well, but output power will be lower. Do not go below 4 ohms.

Can I use this amplifier for passive speakers?

Yes, the Digital-Quad-H3 is designed for passive speakers. Connect speakers to the SpeakON or 1/4" TS output jacks.

How do I set the input gain?

Each channel has an adjustable gain knob. Start with the knob at minimum, play audio at nominal level, then slowly increase until desired volume without clipping (signal LED should not stay red).

Why does the amplifier shut off after a few minutes?

This may be due to thermal protection. Ensure proper ventilation around the amplifier. The fan must not be blocked. Reduce the volume or check speaker impedance.

Can I bridge channels for more power?

The Digital-Quad-H3 does not support bridging. Each channel operates independently.

What type of power cord does it use?

It uses a standard IEC C13 power cord (computer-style). The amplifier has a universal power supply accepting 100-240V AC.

How do I clean the amplifier?

Unplug the unit. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or let moisture enter the vents.

Is there a built-in crossover?

No, the Digital-Quad-H3 is a full-range amplifier without internal crossover. If you need to drive subwoofers or tweeters, use an external crossover or DSP.

What should I do if one channel stops producing sound?

First, check the input cable and speaker connection. Swap the cable with a working channel to isolate the issue. If the problem persists, the channel may be faulty and require service. Contact Vocopro support.

USER MANUAL Digital-Quad-H3 Vocopro

D-QUAD A O AF O RF B O AF O RF C O AF O RF D O AF O RF VacoPro POWER

Digital Quad Conference

owner's manual

Table of Contents

FCC Information 3

Listening for a Lifetime....4

Safety Instructions....5

Welcome 6

Getting Started 7

Getting Connected....8

Discriptions and Functions....12

Commonly Asked Questions 14

FEATURES

• Utilizes the Sparsely Used 900MHz Frequency Band
  • 24-Bit Digital Technology Delivers a Clean, Professional Quality Signal
• Individual Digital Microphone IDs Eliminates Channel Cross-Talk
• Wide Frequency Response (50-20,000 Hz) Ensures Natural Sounding Vocals
• Warranty: 1 Year
• Unit Dimensions: 8.375"W x 1.25"H x 5.25"D

FCC Information

1. IMPORTANT NOTICE: DO NOT MODIFY THIS

UNIT!: This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Vocopro may void your authority, granted by the FCC, to use this product.

1. IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable(s) supplied with this product MUST be used. Follow all installation instructions. Failure to follow instructions could void your FCC authorization to use this product in the U.S.A.

2. NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations, Part 15 for Class "B" digital devices. Compliance with these requirements provides a reasonable level of assurances that your use of this product in a residential environment will not result in harmful interference with other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the owner's manual, may cause interference harmful to the operation of other electronic devices. Compliance with FCC regulations does not guarantee that interference will not occur in all installations. If this product is found to be the source of interference, which can be determined by turning the unit "Off" and "On", please try to eliminate the problem by using one of the following measures:

Relocate either this product or the device that is being affected by the interference.

Use power outlets that are on different branch (circuit breaker or fuse) circuits or install AC line filter(s).

In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in is 300-ohm ribbon lead, change the lead-in to coaxial type cable.

If these corrective measures do not produce satisfactory results, please contact your local retailer authorized to distribute Vocopro products. If you can not locate the appropriate retailer, please contact Vocopro, 1728 Curtiss Court, La Verne, CA 91750.

CAUTION

The apparatus is not disconnected from the AC power source so long as it is connected to the wall outlet, even if the apparatus itself is turned off. To fully ensure that the apparatus is indeed fully void of residual power, leave unit disconnected from the AC outlet for at least fifteen seconds.

CALIFORNIA PROP 65 WARNING

WARNING: This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm. (California law requires this warning to be given to customers in the State of California.)

For more information: www.vocopro.com/prop65

CAUTION:

READ THIS BEFORE OPERATING YOUR UNIT

1. To ensure the finest performance, please read this manual carefully. Keep it in a safe place for future reference.

2. Install your unit in a cool, dry, clean place - away from windows, heat sources, and too much vibration, dust, moisture or cold. Avoid sources of hum (transformers, v motors). To prevent fire or electrical shock, do not expose to rain and water.

3. Do not operate the unit upside-down.

4. Never open the cabinet. If a foreign object drops into the set, contact your dealer.

5. Place the unit in a location with adequate air circulation. Do not interfere with its proper ventilation; this will cause the internal temperature to rise and may result in a failure.

6. Do not use force on switches, knobs or cords. When moving the unit, first turn the unit off. Then gently disconnect the power plug and the cords connecting to other equipment. Never pull the cord itself.

7. Do not attempt to clean the unit with chemical solvents: this might damage the finish. Use a clean, dry cloth.

8. Be sure to read the "Troubleshooting" section on common operating errors before concluding that your unit is faulty.

9. This unit consumes a fair amount of power even when the power switch is turned off. We recommend that you unplug the power cord from the wall outlet if the unit is not going to be used for a long time. This will save electricity and help prevent fire hazards. To disconnect the cord, pull it out by grasping the plug. Never pull the cord itself.

10. To prevent lightning damage, pull out the power cord and remove the antenna cable during an electrical storm.

11. The general digital signals may interfere with other equipment such as tuners or receivers. Move the system farther away from such equipment if interference is observed.

NOTE:

Please check the copyright laws in your country before recording from records, compact discs, radio, etc. Recording of copyrighted material may infringe copyright laws.

Voltage Selector (General Model Only)

Be sure to position the voltage selector to match the voltage of your local power lines before installing the unit.

110V

Listening for a Lifetime

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 Group recommend you avoid prolonged exposure to excessive noise. This list of sound levels is included for your protection.

Some common decibel ranges:

Level	Example
30	Quiet library, Soft whispers
40	Living room, Refrigerator, Bedroom away from traffic
50	Light traffic, Normal Conversation
60	Air Conditioner at 20 ft., Sewing machine
70	Vacuum cleaner, Hair dryer, Noisy Restaurant
80	Average city traffic, Garbage disposals, Alarm clock at 2 ft.

The following noises can be dangerous under constant exposure:

Level	Example
90	Subway, Motorcycle, Truck traffic, Lawn Mower
100	Garbage truck, Chainsaw, Pneumatics drill
120	Rock band concert in front of speakers
140	Gunshot blast, Jet plane
180	Rocket launching pad

-Information courtesy of the Deafness Research Foundation

Safety Instructions

CAUTION RISK OF SHOCK

CAUTION: To reduce the risk of electric shock, do not remove cover (or back). No user-serviceable parts inside. Only refer servicing to qualified service personnel.

Explanation of Graphical Symbols

The lightning flash & arrowhead symbol, within an equilateral triangle, is intended to alert you to the presence of danger.

The exclamation point within an equilateral triangle is intended to alert you to the presence of important operating and servicing instructions.

WARNING

To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture.

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 unit near water. For example, near a bathtub or in a wet basement and the like.
7. Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufacturer.

7 A. An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause an overturn.

1. 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, sofa, rug, or similar surface that may block the ventilation slots.
2. Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat.
3. 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.
4. Grounding or Polarization - Precautions should be taken so that the grounding or polarization means of an appliance is not defeated.
5. 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, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.
6. Cleaning - Unplug this unit from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning.
7. Power lines - An outdoor antenna should be located away from power lines.
8. Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.
9. Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.
10. 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.
11. Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.

Note:

To CATV system installer's (U.S.A.): This reminder is provided to call the CATV system installer's attention to Article 820-40 of the NEC that provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected as close to the point of cable entry as practical.

Welcome

And thank you for purchasing the Digital Quad Conference 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 reinforce 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: [phone]

FAX: [phone]

VocoPro Company Email Directory

Customer Service & General Information

[e-mail]

Tech Support

[e-mail]

Remember Our Website

Be sure to visit the VocoPro website www.vocopro.com for the latest information on new products, packages and promos. And while you're there don't forget to check out our Club VocoPro for Karaoke news and events, chat rooms, club directories and even a KJ Service directory!

We look forward to hearing you sound like a PRO, with VocoPro, the singer's ultimate choice.

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

Getting Started

WHAT'S IN THE BOX:

• (4) Digital-Quad-Conference Mics
• Digital-Quad Receiver
• (2) Antennas
• Power Adapter
  -1/4 Cable

Line drawing of four identical desktop devices with microphones and antennas (no text or symbols)

Illustration of three different electronic components: a pair of bulbs, a coiled cable with two leads, and a power adapter connected to a plug (no text or symbols present)

ANT A O AF O RF B O AF O RF C O AF O RF D O AF O RF VocoPro. POWER ANT

Getting Connected

1. Attach the Conference microphone to the base transmitter

2. Match Pins and slotted groove of the Female XLR on the microphone to the pins of the Male XLR on the transmitter base and press down firmly.

3. Tighten sleeve on the Microphone's XLR connector by turning clockwise.

Line drawing of a mechanical component with a central square recess and two side slots (no text or symbols)

Pure diagram of a cylindrical connector with four circular holes, no text or symbols present

Technical line drawing of a desktop microphone with attached cable and base, showing mechanical assembly (no text or symbols)

Getting Connected

1. Insert 2 fresh 1.5-volt AA alkaline batteries.

Line drawing of a battery holder with internal components and a handle, no text or symbols present

Microphone Battery Installation

1. Locate Battery compartment underneath receiver.
2. To remove the lid, press down on the tab and lift the lid upwards.
3. Insert 2 AA batteries making sure the batteries sit in the correct direction according to polarity (+/-).
4. Close battery compartment lid.

Caution: To Avoid Battery Leakage

- Be sure to insert batteries correctly and follow the microphone and battery manufacturer's instructions.

• Never mix old batteries with new batteries
• Never mix alkaline, standard (carbon-zinc) or rechargeable batteries
  • Always remove exhausted or dead batteries from the Digital Quad Conference
• Remove batteries if you must store the unit away for long periods of time

Getting Connected

1. Simply Turn the Microphone on by pressing the power switch.

2. Look for an illuminated RF led on the main receiver, this indicates that the Digital Quad Conference microphone has paired successfully.

3. Speak into the microphone and verify that the AF LED light flashes for the corresponding connected channel.

ANT A O AF RF B O AF RF C O AF RF D O AF RF VocoPro POWER ANT

Your Digital Quad Conference is now connected to your Digital-Quad-Play.

DIGITAL BUSCO CONference POWER

Microphone Placement

• Aim the microphone toward the desired sound source, such as the talker.
• Do not aim the microphone toward a loudspeaker.
• Place the microphone within 20cm\~40cm (8-16inch) of the person speaking

Getting Connected

TO CONNECT TO A MIXER

UNBALANCED 1/4"

1. Connect unbalanced 1/4" cable (included) to the unbalanced output from the Digital-Quad receiver.
2. Connect the other end of the 1/4" cable to a microphone input channel on a mixer/amplifier.

VocoPro DIGITAL-QUAD 13.5V POWER IN MIX OUT CH 4 CH 3 CH 2 CH 1 Rear Panel DIGITAL-QUAD Mixer VocoPro 1 2 3 4 MIC AUX SEND PROFESSIONAL X/D/L/VJ MIXER WITH DSP MIC EFFECT & DIGITAL KEY CONTROL CHANNEL 1 00:1 CHANNEL 2 00:2 CHANNEL 3 00:3 VOCO PROX VOCO 1 - MAIN 1 & 2 AV METER

BALANCED XLR [OPTIONAL]

1. Connect 4 balanced XLR cables (not included) to the balanced outputs of the Digital-Quad receiver.
2. Connect each end of the XLR cables into individual microphone input jacks on a mixer/amplifier to be used (ex. Mic 1, Mic 2, Mic 3, Mic 4).

Note: Example illustrated is for clarity only. For ease of operation, attach the channel 1 output to the channel 1 input, channel 2 output to the channel 2 input, channel 3 output to the channel 3 input, and the channel 4 output to the channel 4 input on a mixer.

VocoPro DIGITAL-QUAD 13.5V POWER IN MIX OUT Rear Panel DIGITAL-QUAD Mixer PROFESSIONAL RIOU/PU MIVER WITH ISP MIC EFFECT & DIGITAL KEY CONTROL CHANNEL 1 CD 1 HIL 1 LINE HIL 2 LINE HIL 3 LINE CHANNEL 2 CD 2 HIL 3 LINE CHANNEL 3 CD 3 VIDEO MULTLE VIDEO 1 + MAIN 1 G 2 AVI MISION

Descriptions and Functions

1. GRILL - Protects the microphone cartridge and helps reduce "breathy" and wind noise pick-up.
2. POWER switch - Press once to turn the microphone power ON and press again to power OFF. The microphone will almost instantly pair with the receiver module once powered on.
3. XLR CONNECTOR- threaded sleeve for secure connection.
4. BATTERY COMPARTMENT - Removable lid hides and protects the microphone battery.

① ② ③ ④

Descriptions and Functions

RECEIVER - FRONT PANEL

1. ON/OFF Button - Powers the receiver on/off.
2. Mic Volume - Adjusts the volume of their respective microphone channels.
3. RF LEDs - Registers Mic status: LED will shine when associated mic is powered on.
4. AF LEDs - Registers Mic transmission: LED will flash when audio is received.
5. BNC Connectors - Used to mount antennas.

DIGITAL-QUAD ANT A O AF RF B O AF RF C O AF RF D O AF RF VocoPro POWER ANT 2 1 3 5 VocoPro DIGITAL-QUAD 13.5V POWER IN MIX OUT CH 4 CH 3 CH 2 CH 1 1 2

RECEIVER - BACK PANEL

1. Unbalanced Mic Out - Outputs all mic signals via the included 1/4" cable to a mixer or amplifier.
2. Balanced Mic Out - Outputs the respective mic channel audio via an XLR cable to a mixer or an amplifier.
3. AC Input - Connect AC power adapter here.

Commonly Asked Questions

Q. What do I do if my mics are cutting in and out?

A. Make sure both antennas are firmly attached to their posts.

A. Keep the receiver away from fluorescent lights.

A. Make sure microphones are being used within the operational range.

A. Ensure batteries are not depleted.

Q. There's a thumping noise coming through the speakers, what is it?

A. This typically occurs when the batteries are low.

A. Less likely, it may be the power supply not providing the correct power. Try a suitable replacement adapter with same values to confirm.

A. If problem persists, please call VocoPro at 800-678-5348 for further instructions.

Q. The lights on the receiver are flashing off and on continuously, what's going on?

A. Ensure the correct power supply is used with the Digital-Quad.

A. Inspect power supply cable for frayed wired or loose connections.

A. Find a suitable replacement for the original power supply; contact VocoPro for factory original parts at 800-678-5348.

Specifications

Type: Capacitance

Frequency Repsonse: 100Hz\~16KHz

Polar pattern: Cardioid

Output Impedance: 200Ω

Sensitivity: -40dB±2dB

Working distance: 20cm\~40cm (8-16inch)

Battery: AA 1.5V*2

RF power: 10mW

Band width: 300kHz

Radio Frequency Range: 900-980MHz

Microphone Transmission Frequencies in MHz:

A. 902.000 ORANGE

B. 904.600 SKY BLUE

C. 907.500 GRASS GREEN

D. 910.700 RED

E. 913.300 DARK BLUE

F. 916.300 YELLOW

G. 920.100 BLACK GREEN

H. 925.800 SILVER

I. 903.100 BROWN

J. 905.800 PEACH

K. 908.800 PURPLE

L. 912.200 GREEN

M. 915.000 WHITE

N. 918.700 BLACK

1. 922.800 YELLOW GREEN

P. 927.200 PINK

Notes

Blank white rectangle with a gray tab at the top corner (no text or symbols)