alphard audio MLA-4080 FOUR-CHANNEL AMPLIFIERS Owner’s Manual

alphard audio MLA-4080 FOUR-CHANNEL AMPLIFIERS

 INTRODUCTION

Thank you for purchasing of this Deaf Bonce product! Our company is committed to the creation of extremely loud sound systems with no loss of quality.To ensure proper use, please carefully read through this manual before using this product. It is especially important that you read and observe caution’s in this manual. Please keep the manual in a safe and accessible place for future reference.

SAFETY INSTRUCTIONS

1. Make sure that your vehicle has a 12V DC electrical system with negative grounding. Before installing the amplifier in cars, trucks or
   buses, check the battery voltage.

2. Checkthe state of on-board power supply ofyourvehicle, the battery and the alternator. When the engine is running, depending on
   the ambient temperature, the voltage to be outputted by the alternator must be within the range of 14 to 14.7 V. Open circuit voltage
   (OCV) of the battery must be within the range of 12.5 to 13 V. Make sure that the rated current of the alternator and the battery capacity is enoughto provide increased consumption. For example, for the power of the amplifier 1000 W, the rated current of the alternator is required at the rate of 1000 W/13 V = 77 amperes. Amore powerful amplifier requires a more powerful alternatoras well asan additional battery.

3. Do notplace the amplifier in the engine compartment and also in the places exposed to water, moisture, dust or dirt.

4. Never stretch the cables outside of the car and near the moving parts of the car. This can lead to destruction of the insulating layer,
   short circuit and fire.

5. The amplifier should be installed in areas of the car where the temperature varies from 0°C (32 °F) to 55 °C (131 °F). The amplifier
   should be in a place with a good air circulation. The horizontal position of the amplifier is the best way toinstall.

6. During the operation the amplifier may be heated up to 80°C (176°F). Before you touch it, make sure it is not overheated that may
   be dangerous.

7. To improve the cooling of the amplifier, it is recommended to clean periodically the heatsink from dust. When cleaning the heatsink
   strong solvents should not be used as they may damage the amplifier. Do not use compressed air, because solids can penetrate inside the amplifier. Cleanings best done with wet towels or cloth.

8. Make sure that the location ofthe amplifier does not violate the proper operation of mechanical and electrical devices of the vehicle.

9. Make sure that during the installation and connection of the battery, the power cables are not shorted.

10. When performing plumbing, drilling or cutting works with the car, make sure that there is no wiring, brake lines, fuel pipe or other
    structural elements under the place of work. Follow the satety rules! Use protective glassees and qloves

11. lo protect the wires use rubber gaskets if the wire passes through a hole in the plate, or other similar materials if it lies close to the
    parts exposed to heat.

12. Make sure that all the cables are fixed over the entire length. Also make sure that their outer protective shell is non-combustible.
    Use a clamping screwto secure the positive and negative cables next to the appropriate terminals ofthe amplifier.

13. Select a diameter of the power cable in accordance with the power of the amplitier and the recommendations provided here.
    Power cables are extremely important since they directly affect the system damping factor and sound quality. The cables to the battery
    must be in the copper crimp terminals pressed with the help ofa hydraulic press, and well fixed to the battery terminals.

14. To avoid accidental damage, keepthe amplifier in its original packaging priorto installation.

15. Use high-quality copper speaker and power cables.
    CAUTION!!! High sound pressure can damage your health!
    Please use the common sense when controlling volume!

TYPICAL  INSTALLATION  SEQUENCE

1. Before installing the amplifier disconnect the battery from the electrical system.

2. To connect the amplifier it is necessary to stretch the power cable from the location of the battery to the place of installation
   of the amplifier. Select the power cable with the appropriate regulations in AWG (see Table: Selection of the diameter of the
   power cables)

3. Connect the power supply with the correct polarity. Connect all (+) terminals of the amplifier to the cables stretching from
   the positive terminal of the battery and all (-) terminals of the amplifier-to the cables stretching from the negative terminal of the
   battery.

4. Place the fuse holder for each positive cable within 40 cm from the positive terminal of the battery and connect one end of the power cable to the holder after connecting the other end to the amplifier. Do not install the fuse(s).

5. Route all signal cables next to each other and separately from the power cables.

6. Connect the wires of RCA input. The input signal power must be between 0.2 V and 6 V.

7. To connect the power wire supply is necessary to use special power cables.

8. Fasten the amplifier properly when installing it in the vehicle. If the component is disconnected during driving, it may cause
   serious damage to the passengers of the vehicle or another vehicle. It is not recommended to screw the amplifier directly to the
   metal it can lead to distorsions at the signal outputs.

9. After installation is complete, check the wiring of the system and make sure that all connections have been made correctly.
   Before installing the fuses, disconnect the positive lead from the battery and then install the fuse in the fuse holder. Using the
   light bulb 12 V 21 W, connect the positive lead to one contact of the bulb and the other contact of the bulb to the positive
   terminal of the battery.When properly connected, the bulb must briefly light up and go out. Now you may connect the positive lead to the (+) of the battery. If the light does not go out, then something is wrong. This will prevent damage to the amplitfier in case of reverse polarity and unwanted sparks when connecting. Install the rest of the fuses.

10. To activate the amplifier, it is necessary to apply the positive potential of 12 volts to the control input of the amplifier (REM
    IN) through a switch ora corresponding controloutput(REMOTE OUT) with the head unit (HU).

11. LED indicator on front of the amplifier turns blue to indicate that the amplifier is turned on. If the indicator does not light up see chapter “Possible taults and their solutions” for more information.

12. The sound level is calibrated by adjusting the volume of the source up to 3/4 of its maximum level. Then, adjust the sensitivity level of the amplifier up until you hear distortions.

 SELECTION OF THE DIAMETER OF POWER CABLES AND SPEAKER CABLES

Selection of the diameter of the power cables

Use the table below to select the desired diameter based on the length and the current consumption

Selection of the diameter of the speaker cables

Use the table below to select the desired diameter based on the length and the power consumption.

WIRING  DIAGRAMS

Connect the speaker cables from the positive and negative terminals of the speakers to the respective outputs of the amplifier terminal marked with CH1 / CH2, CH3 / CH4 SPEAKERS OUTPUTS, as shown at the diagram. To connect the power wire supply it is necessary to use special power cables. The fuse is placed in the holder and fixed in the cable cut. One end of the cable is connected to the positive terminal of the battery, the second one – to the amplifier terminals marked with +12V. Be sure to use a fuse with the parameters sufficient for use in the system. The length and diameter of the grounding cable must conform to the length and diameter of the cable +12V. Connect one end to the negative terminal of the battery and the other end of the grounding cable to the terminals marked with GND. Connect the head unit (HU) to low-level inputs of the amplifier using RCA cable.

Standard wiring diagram of four-channel amplifier to two speakers, to one subwoofer and to battery

• Step 1. Connect the speaker cable from (+) terminal of the amplifier to (+) terminal of the speaker.
• Step 2. Connect the speaker cable from (-) terminal of the amplifier to (-) terminal of the speaker.
• Step 3. Repeat the installation sequence for each speaker step 1 and step 2
• Step 4. Connect the speaker cable from (+) terminal of the amplifier to (+) terminal of the subwoofer.
• Step 5. Connect the speaker cable from (-) terminal of the amplifier to (-) terminal of the subwoofer.
• Step 6. Connect one end of the power cable from (+) terminal of the battery and the second end to the amplifier terminal marked with + 12V. Do not forget to protect positive power cable with appropriate fuse.
• Step 7. Connect one end of the power cable from (-) terminal of the battery and the second end of the grounding cable to the terminals marked with GND.
• Step 8. Connect one end of the cable to the Remote output terminal at the HU and the second end to the amplifier terminal marked with REM IN.

Caution!!! The minimum permissible connection load impedance at single channel is 2 ohm. For amplifiers MLA-4080, MLA-4120 the operating voltage is 10-15 V.

Standard wiring diagram of four-channel amplifier to four speakers

• Step 1. Connect the speaker cable from (+) terminal of the amplifier to (+) terminal of the speaker.
• Step 2. Connect the speaker cable from (-) terminal of the amplifier to (-) terminal of the speaker.
• Step 3. Repeat the installation sequence for each speaker step 1 and step 2

Caution!!! The minimum permissible connection load impedance at single channel is 2 ohm. For amplifiers MLA-4080, MLA-4120 the operating voltage is 10-15 V.

Standard wiring diagram of four-channel amplifier to head unit

Step 1. Connect one end of the RCA cable to the RCA output terminals at the HU and the second end to the amplifier RCA inputs terminals marked with CH1/CH2, CH3/CH4.

Application of connectors and controls

1. CROSSOVER – HPF – high pass filter (10 Hz – 12 kHz at 12 dB/Oct)
2. CROSSOVER – selection of built-in filters operating mode (HPF, FLAT, LPF / BP)
3. CROSSOVER – LPF – low pass filter (10 Hz – 12 kHz at 12 dB/Oct)
4. BASS BOOST – bass level adjustment (0 – 12 dB)
5. GAIN – input signal level adjustment 0.2 V – 6 V
6. CH1/CH2, CH3/CH4 – signal input, RCA jacks
7. POWER – LED for operation (blue). PROTECT – LED for operation (red)
8. HI-LEVEL INPUT – high-level signal input

1. GND – grounding supply terminal
2. REM IN – connector of remote activation of the amplifier
3. +12V – power supply terminal +12 V
4. FUSE – fuse connection terminal
5. SPEAKERS OUTPUTS – speaker terminal connections
6. PWR – LED for operation (blue)
7. BASS BOOST – bass level adjustment

CONNECTION METHODS

The minimum permissible load impedance at the output of the amplifier is 2 Ohm.

SPEAKERS WIRING DIAGRAMS
In any case do not expose the amplifier to the loads lower than specified by the manufacturer. Use these schematics to calculate load impedance of different connection types

Serial connection of the speakers

Parallel connection of the speakers

Mixed connection of the speakers

CAUTION!!! High sound pressure can damage your health! Please use the common sense when controlling volume!

SUBWOOFERS WIRING DIAGRAMS

The minimum permissible load impedance at the single channel is 2 ohm, in bridged mode 4 ohm. Use these formulas to calculate the load impedance of various types of connections

Serial connection

Parallel connection

SCHEMES OF ENABLING THE LOAD OF THE SUBWOOFER

In any case do not expose the amplifier to the loads lower than specified by the manufacturer. Use these schematics to calculate load impedance of different connection types.

Voice coil s 1+1, 2+2, 4+4 Ohm

One subwoofer, coils in series

One subwoofer, coils in parallel

Subwoofers in series , coils in parallel

Subwoofers in series, coils in series

Subwoofers in parallel, coils in series

Subwoofers in parallel, coils in parallel

CAUTION!!! High sound pressure can damage your health!Please use the common sense when controlling volume!

SPECIFICATIONS

POSSIBLE  FAULTS  AND  THEIR  SOLUTIONS

Deaf Bonce amplifiers are high-quality and technically perfect products. The problems often arise due to improper use, faulty connection of components or lack of power supply of the on-board network.

1. The amplifier does not turn on.
   Problem solution: Check all the contacts and the presence of 10-15 V at the amplifier terminals. Check whether the control input of the amplifier “REM IN” receives the positive potential of +12 V.

2. Power turns on, but goes into protection (security indicator lights up)
   Problem solution: Check if there is a short circuit on the amplifier output which is connected to the speakers or subwoofers. Make sure that commutation of the voice coils of the subwoofer is correct. The rated impedance of the voice coils should not be lower than the permissible rated load impedance of the amplifier. Check the supply voltage of the amplifier. It must be within the range of 10-15 V.

3. plifier may lack power. Make sure that The the amplifier rated current turns on of the but at a alternator high and volume the it goes battery in to capacity protection. is enough Problem to power solution: this The amplifier.am Check the amplifier for overheating. Check the load impedance.

4. The amplifier is turned on, but there is no sound from the speakers or subwoofer.
   Problem solution: Check the connection of the amplifier, the integrity of the interconnecting cable, HU, the speakers or the subwoofer.

BOX  CONTENTS

1. Amplifier – 1 pc.
2. Owner’s Manual – 1 pc.
3. Warranty card – 1 pc.
4. Mounting Kit – 1 pc.
5. Window decals – 2 pcs.

 WARRANTY  AND  MAINTENANCE  INFO

Deaf Bonce products are warranted against defects concerning materials and their manufacturing under normal functioning conditions.
While the product is under warranty, defective parts will be repaired or replaced at the manufacturer’s discretion. The defective product, along with notification about it, must be returned to the dealer from which it was purchased together with the warranty certificate duly filled in, complete with the original packaging. If the product is no longer under warranty, it will be repaired at the current costs. Our company does not undertake any liability for damages due to transportation. Our company does not take any responsibility for: costs or loss of profit due to the impossibility to use the product, other accidental or consequential costs, expenses or damages suffered by the customer. Warranty according to laws in force. For more information visit our website and carefully read warranty card. The manufacturer reserves the right to change design and specification without prior notice.

INFORMATION ON DISPOSAL OF THE ELECTRICAL AND ELECTRONIC EQUIPMENT (FOR

THE EUROPEAN COUNTRIES WITH SEPARATE WASTE COLLECTION)

Items marked “crisscrossed wheeled bin” are not allowed to be disposed of together with usual household waste. These electrical and electronic products should be disposed of in special reception centers, equipped for recycling such products and components. For information about the location of the nearest disposal / recycling spot and the rules of delivery of waste please contact your local municipal office. Recycling and proper disposal helps to protect the environment and prevent harmful effects on health.

Manufacturer: Ningbo Sound Solution 18&E Trading Co., Ltd Made in China

https://alphard.audio

References

• Deaf Bonce - Alphard Group, LLC
• Alphard - Professional Car Audio. Speakers, Subwoofers, Amplifiers

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