DEAF BONCE MFA-5.1000 Five-Channel Amplifier Owner’s Manual
- June 13, 2024
- Deaf Bonce
Table of Contents
MFA-5.1000 Five-Channel Amplifier
Product Information:
The Five-Channel Amplifier MFA-5.1000 is a Class D amplifier
manufactured by Deaf Bonce. It is designed to provide extremely
loud sound systems with no loss of quality. The amplifier operates
on an operating voltage of 9-15V and has a minimum permissible
connection load impedance of 2 Ohm for each channel and 4 Ohm for
bridged connections.
Warranty and Service:
Deaf Bonce provides a warranty period, after-sales service, and
service life information for this product. Please refer to the
company’s website at https://alphard.audio for more details
on warranty coverage and service options.
Product Usage Instructions:
Step 1: Selection of Power and Speaker Cables
Refer to the table provided in the user manual to select the
appropriate diameter of power cables and speaker cables based on
the length and power consumption or current consumption of your
setup.
Step 2: Wiring Diagrams
The user manual provides standard wiring diagrams for different
connection setups. Choose the appropriate wiring diagram based on
your requirements.
Standard Wiring Diagram for Five-Channel Amplifier to Four
Speakers and One Subwoofer:
Follow the provided wiring diagram to connect four speakers, one
subwoofer, and the battery to the amplifier. Make sure to maintain
the minimum permissible connection load impedance of 2 Ohm for each
channel.
Standard Wiring Diagram for Five-Channel Amplifier to Head
Unit:
Connect one end of the RCA cable to the RCA output terminals at
the Head Unit (HU) and the other end to the amplifier’s RCA input
terminals marked with CH1/CH2, CH3/CH4, and SUBWOOFER.
Step 3: Connection Methods
The user manual provides information on different speaker
connection methods and their corresponding total impedance. Choose
the appropriate connection method based on your setup
requirements.
Serial Connection of Speakers:
Follow the provided formulas to calculate the total impedance
for serially connected speakers with different voice coil
impedances.
Parallel Connection of Speakers:
Follow the provided formulas to calculate the total impedance
for speakers connected in parallel with different voice coil
impedances.
Mixed Connection of Speakers:
Follow the provided formulas to calculate the total impedance
for a combination of serial and parallel connections of speakers
with different voice coil impedances.
CAUTION: High sound pressure can damage your
health. Please use common sense when controlling volume.
FIVE-CHANNEL AMPLIFIER
MFA-5.1000
HTTPS://ALPHARD.AUDIO
CLASS D
EN
Warranty period, after-sales service and service life information
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.
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 0.4 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 amplifier 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 or a corresponding control output (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 faults 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.
4. SELECTION OF THE DIAMETER OF POWER CABLES AND SPEAKER CABLES
EN
Selection of the diameter of the power cables
Selection of the diameter of the speaker cables
Use the table below to select the desired diameter based Use the table below to select the desired diameter based
on the length and the current consumption.
on the length and the power consumption.
Consumption current () Power consumption (W)
240-350 180-240 150-180 120-150 100-120 80-100
60-80 40-60 20-40 8-20
0-8 0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8
Cable length (m)
Diameter
A.W.G mm²
1/0 53,5 2 33,6 4 21,2 8 8,4 10 5,3 12 3,3 14 2,1 16 1,3 18 0,8
25 000 20 000 15 000 10 000 8000 6000 4000 2000 1000
500 250 100
0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8
Cable length (m)
Size A.W.G mm²
5 16,8 8 8,37 10 5,26 14 2,08
5. WIRING DIAGRAMS
EN
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 OR SUBWOOFER, 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 five-channel amplifier to four speakers, to one subwoofer and to battery
Step 1. Connect the speaker cable from (+) speaker terminal of the amplifier to (+) terminal of the speaker. Step 2. Connect the speaker cable from (-) speaker 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 (+) subwoofer terminal of the amplifier to (+) terminal of the subwoofer. Step 5. Connect the speaker cable from (-) subwoofer 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.
2
2
min. 2 Ohm 2
not more than 40 cm
2
Caution!!! The minimum permissible connection load impedance at every single
channel is 2 Ohm. For bridged connection is 4 Ohm. For model MFA-5.1000 the
operating voltage is 9-15V.
4
Standard wiring diagram of five-channel amplifier to head unit
EN
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 and SUBWOOFER.
Application of connectors and controls
1
3
4 5 67 8 9
16
17
2
10 11 12 13 15 14
18 19 20
1. POWER / PROTECT LED for operation (blue) / LED for protection (red)
2. CLIP LED on the clip (orange)
3. INPUT signal input, RCA jacks
4. CH 1-2 GAIN input signal level adjustment (0.4 V 6 V) 5. CH 1-2 CROSSOVER selection of built-in filters operating mode (HPF, FLAT, LPF)
6. CH 1-2 FREQ low pass or high pass filter frequency adjustment (50 Hz 12 kHz at 12 dB/Oct)
7. CH 3-4 GAIN input signal level adjustment (0.4 V 6 V)
21
8. CH 3-4 CROSSOVER selection of built-in filters operating mode (HPF, FLAT, LPF)
9. CH 3-4 FREQ low pass or high pass filter frequency adjustment (50 Hz 12 kHz at 12 dB/Oct)
10. SUBWOOFER GAIN input signal level adjustment (0.4 V 6 V)
11. SUBWOOFER PHASE phase shifter 0°/180°
12. SUBWOOFER BASS BOOST bass level adjustment (0-12 dB at 45 Hz)
13. SUBWOOFER SUBSONIC subsonic frequency filter (10 Hz – 55 Hz at 24 dB/Oct) 14. SUBWOOFER LPF low pass filter (50 Hz 250 Hz at 24 dB/Oct) 15. REMOTE input for connection of the bass remote control 16. SPEAKERS OUTPUTS speakers connection terminals 17. SUBWOOFER OUTPUT subwoofer connection terminals 18. +12V power supply terminal (+12V)
19. REM IN connector of remote activation of the amplifier
20. GND grounding supply terminal «-»
21. GAIN input signal level adjustment
6. CONNECTION METHODS
EN
The minimum permissible load impedance at the output of the amplifier is 2 Ohm, in bridged mode 4 Ohm.
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
Voice coil
4 Ohm 8 Ohm
Total impedance
8 Ohm 16 Ohm
Voice coil
4 Ohm 8 Ohm
Total impedance
12 Ohm 24 Ohm
Parallel connection of the speakers
Voice coil
4 Ohm 8 Ohm
Total impedance
16 Ohm 32 Ohm
Voice coil
4 Ohm 8 Ohm
Total impedance
2 Ohm 4 Ohm
Voice coil
4 Ohm 8 Ohm
EN
Total impedance
1.33 Ohm 2.66 Ohm
Voice coil
4 Ohm 8 Ohm
Total impedance
1 Ohm 2 Ohm
Mixed connection of the speakers
Voice coil
4 Ohm 8 Ohm
Total impedance
4 Ohm 8 Ohm
CAUTION!!! High sound pressure can damage your health! Please use the common sense when controlling volume!
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
Total impedance = Sub 1 + Sub 2 + Sub 3 …
Parallel connection Total impedance=
1
…
1
1
1 …
Sub 1 + Sub 2 + Sub 3 …
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.
7
Voice coils 1+1, 2+2, 4+4 Ohm The subwoofer has voice coil D1, D2 or D4. One
subwoofer, coils in series
One subwoofer, coils in parallel
Subwoofers in series, coils in parallel
EN
1+1
2+2
4+4
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
2 Ohm 4 Ohm 8 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
0.5 Ohm 1 Ohm 2 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
1 Ohm 2 Ohm 4 Ohm
Total impedance
1.5 Ohm 3 Ohm 6 Ohm
8
Subwoofers in series, coils in series Subwoofers in parallel, coils in series
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
EN
Total impedance
2 Ohm 4 Ohm 8 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
4 Ohm 8 Ohm 16 Ohm
Total impedance
6 Ohm 12 Ohm 24 Ohm
Total impedance
8 Ohm 16 Ohm 32 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
1 Ohm 2 Ohm 4 Ohm
9
Subwoofers in parallel, coils in parallel
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
EN
0.66 Ohm
1.33 Ohm
2.66 Ohm
Total impedance
0.5 Ohm 1 Ohm 2 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
0.25 Ohm 0.5 Ohm 1 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
0.16 Ohm 0.33 Ohm 0.66 Ohm
Voice coils
1+1 Ohm 2+2 Ohm 4+4 Ohm
Total impedance
0.125 Ohm 0.25 Ohm 0.5 Ohm
CAUTION!!! High sound pressure can damage your health! Please use the common
sense when controlling volume!
10
Model Power RMS 4 hm (W) Power RMS 2 hm (W) Power RMS 4 hm bridged mode (W) 1-4 channel High pass filter (Hz) 1-4 channel Low pass filter (Hz) 1-4 channel Crossover (dB/Oct) 5 channel Low pass filter (Hz) 5 channel Subsonic (Hz) 5 channel Crossover (dB/Oct) Bass level adjustment (dB at 45 Hz) Frequency response (Hz) Input sensitivity (V) Signal to noise ratio (dB) Damping factor Integrated Fuse (Yes/No) Input terminal connection (AWG /mm²) Output terminal connection (AWG /mm²) Working voltage (V) The simultaneous operation of LPF and HPF Minimum permissible load impedance on the single channel (Ohm) Minimum permissible load impedance in bridged mode (Ohm) Size (LWH), mm Size (LWH), inch RMS Power at 14.4 V, THD 1%
MFA-5.1000 4 x 80 + 1 x 300 4 x 120 + 1 x 500
2 x 240 50 – 12 000 50 – 12 000
12 50 – 250 10 – 55
24 0-12 10 – 20 000 0.4 – 6 90 180 No 4 / 21.15 8 / 8.29 9-15 No
2 4 271.4 x 151.8 x 54.7 10.69 x 5.98 x 2.15
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.
-
The amplifier does not turn on. Problem solution: Check all the contacts and the presence of 9-15 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 (protection indicator lights up) Problem solution: Check if there is a short circuit (fault) 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 9-15 V.
-
The amplifier turns on but at a high volume it goes in to protection. Problem solution: The amplifier may lack power. Make EN
sure that the rated current of the alternator and the battery capacity is enough to power this amplifier. 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.
9. BOX CONTENTS
1. Amplifier 1 pc. 2. Owner’s manual 1 pc. 3. Warranty card 1 pc. 4. Remote control 1 pc. 5. Mounting it1 pc.
10. WARRANTY PERIOD, AFTER-SALES SERVICE AND SERVICE LIFE I N F O R M AT I O N
Each Deaf Bonce product is warranted to be free from defects in materials and workmanship under normal use and service. The warranty period for the product is 12 (twelve) months from the date on which the product is transferred to the consumer (this date shall be deemed to be the date on which the consumer starts using the product). During the warranty period, defective parts will be repaired or replaced at the discretion of the manufacturer provided that there are grounds for doing so under the laws of the consumer’s country. The defective product must be returned to the dealer from whom it was purchased together with the duly filled out warranty certificate, complete, with original packaging. Our company shall not be liable for any damage caused by transportation. Our company shall not be liable for any expenses or lost profits arising out of or in connection with the use or inability to use the product or any other incidental or indirect costs, expenses, or damages incurred by the customer. The warranty is valid in accordance with the laws currently in force. For more information, please visit our company website and refer to the warranty card. The manufacturer reserves the right to change the design and specification of the product without prior notice. The service life of the product is 12 (twelve) months from the date on which the product is transferred to the consumer (this date shall be deemed to be the date on which the consumer starts using the product). The product or any part (component) of the product must not be used in any way (including, but not limited to use for intended or any other purpose, transportation, storage, modification/alteration/improvement/upgrade) after the expiry of the service life. At the end of its service life, the product must be disposed of.
11. INFORMATION ON DISPOSAL OF THE ELECTRICAL AND ELECTRONIC EQUIPMENT (FOR THE EUROPEAN COUNTRIES WITH SEPARATE WASTE COLLECTION)
MFA-5.1000
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180-240 150-180 120-150
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10 5,3
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1
3
4 5 67 8 9
16
17
2
10 11 12 13 15 14
18 19 20
1. POWER / PROTECT () / () 2. CLIP () 3. INPUT , RCA 4. CH 1-2 GAIN
(0,4 6 ) 5. CH 1-2 CROSSOVER (HPF, FLAT, LPF) 6. CH 1-2 FREQ (50
12 12 /) 7. CH 3-4 GAIN (0,4 6 ) 8. CH 3-4 CROSSOVER (HPF, FLAT,
LPF) 9. CH 3-4 FREQ (50 12 12 /) 10. SUBWOOFER GAIN (0,4 6 ) 11.
SUBWOOFER PHASE 0°/180°
12. SUBWOOFER BASS BOOST (0-12 45 ) 13. SUBWOOFER SUBSONIC (10 – 55
24 /) 14. SUBWOOFER LPF (50 250 24 /) 15. REMOTE 16. SPEAKERS OUTPUTS
17. SUBWOOFER OUTPUT 18. +12V (+12) 19. REM IN 20. GND «-» 21. GAIN
21
16
RU
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RU
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21
RMS 4 () RMS 2 () RMS 4 () 1-4 () 1-4 () 1-4 (/) 5 () 5 () 5 (/) ( 45 ) () () / () (/) (AWG/²) (AWG/²) () () () (), (), RMS 14,4 , 1%
MFA-5.1000 4 80 + 1 300 4 120 + 1 500
2 240 50 – 12 000 50 – 12 000
12 50 – 250 10 – 55
24
0 – 12 10 – 20 000
0,4 – 6 90 180
4 / 21,15 8 / 8,29
9-15
2 4 271,4 x 151,8 54,7 10,69 x 5,98 2,15
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MFA-5.1000
: Ningbo Sound Solution I&e Trading Co., Ltd