Alphard DB-7500.1D User Manual [ru]
OWNER’S MANUAL
CAR AMPLI F I E R S
MONOBLOCK CLASS D
http://alphard.audio
CONTENTS
1. Introduction.
2. Safety instructions.
3. Typical installation sequence.
4. Connection methods.
5. Wiring diagrams.
6. Selection of the diameter of power cables and speaker cables.
7. Specifications.
8. Possible faults and their solutions.
9. Box contents.
10. Warranty and maintenance info.
11. Information on disposal of the electrical and electronic equipment (for the
European countries with separate waste collection).
EN
2
1. INTRODUCTION
Thank you for purchasing this ALPHARD product! Alphard Sound Technology is committed to the creation of extremely
high-profile systems with no loss of quality.
To ensure proper use, please 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.
2. SAFETY INSTRUCTIONS
1. This unit is for vehicles with a 12V battery and negative grounding. Before installing in recreational vehicles, trucks or buses,
check the battery voltage.
2. Check the state of on-board power supply of your vehicle, the battery and the generator. When the motor is running,
depending on the ambient temperature, the voltage to be outputted by the generator is 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 generator and
the battery capacity is enough to provide increased consumption.
For example, for the power of the amplifier 1000 W, the rated current of the generator is required at the rate of 1000 W / 13 V
= 77 amperes. A more powerful amplifier requires a more powerful generator as well as an additional battery.
3. Do not place the amplifier in either the engine compartment or the places exposed to water, moisture, dust or dirt.
4. Never stretch the cables outside 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 is 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 to install.
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 of the 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 safety rules! Use protective glasses and gloves.
11. To 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 noncombustible. Use a clamping screw to secure the positive and negative cables next to the appropriate terminals of the amplifier.
13. Select a diameter of the power cable in accordance with the power of the amplifier 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 with the help of a hydraulic press, and is well secured to the battery terminals.
14. To avoid accidental damage, keep the amplifier in its original packaging prior to installation.
15. Use high-quality copper speaker cables.
CAUT ION!!! High sound pressure can damage your health!
Please use the common sense when controlling volume!
EN
3. TYPICAL INSTA L L ATION 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: Power cable)
3. Connect the power supply with the correct polarity. Connect all (+) terminals of the amplifier to the cable from the positive
terminal of the battery and the (-) terminals of the amplifier – to the cables running 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.
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 must be between 0.3 VRMS and 5 VRMS.
7. Connect the output of the amplifier via speaker cable with a maximum diameter of 8 AWG (8.4 mm²).
8. To activate the amplifier, it is necessary to apply the positive potential of 12 volts to the control input of the amplifier
(REMOTE IN) through a switch or a corresponding control output (REMOTE OUT) with the head unit (HU).
9. LED indicator on the front panel lights up in green, indicating that the device is turned on. LED indicator lights up in red
when the outputs are overloaded, if the temperature protection is activated, if there is a short circuit in the system cables to the
heatsink and if the amplifier is faulty.
10. 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 car or another vehicle.
11. 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 (+)
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.
12. The sound level is calibrated by adjusting the volume of the source up to 3/4 of its maximum level. Then, adjust the level of
the amplifier up until you hear distortion.
13. The minimum permissible resistance at the output of the amplifier is 1 ohm. Use these formulas to calculate the resistance
of various types of compounds.
3
4. CONNECTION METHODS
The minimum permissible resistance at the output of the amplifier is 1 ohm. Use these formulas to calculate the
resistance of various types of compounds.
SERIES CONNE C T I O N
Total resist a n c e = Ω S u b 1 + Ω S u b 2 + Ω Sub 3 ...
PA R A L L E L CONNECTION
1
Total resist a n c e =
SCHEMES OF ENA B L I N G T H E L O A D OF THE SUBWOOFER
VOICE COIL 1+1 , 2 + 2 , 4 + 4 O h m
The subwoofer has two voice coils.
ONE S UB WOO FE R, CO IL S IN SE RI ES.
1
Ω Sub 1 + Ω Sub 2 + ΩSub 3 . . .
1
...
1
...
2+21+1 4+4
EN
ONE S UB WOO FE R, PA RA LLE L CO ILS
SUB WO OFE R IN S ERI ES , PAR AL LEL C OI L S
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Total impedance
2 Ohm
4 Ohm
8 Ohm
Total impedance
0,5 Ohm
1 Ohm
2 Ohm
Total impedance
1 Ohm
2 Ohm
4 Ohm
4
Voice coil
Total impedance
EN
SUB WO OFE R IN S ERI ES , COI LS I N SER IE S
1+1 Ohm
2+2 Ohm
4+4 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
1,5 Ohm
3 Ohm
6 Ohm
Total impedance
2 Ohm
4 Ohm
8 Ohm
Total impedance
4 Ohm
8 Ohm
16 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Total impedance
6 Ohm
12 Ohm
24 Ohm
Total impedance
8 Ohm
16 Ohm
32 Ohm
5
PAR AL LEL S UB WOO FE R, CO IL S IN SE RI E S
EN
PAR AL LEL S UB WOO FE R, PA RA LLE L CO I LS
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Total impedance
1 Ohm
2 Ohm
4 Ohm
Total impedance
0,66 Ohm
1,33 Ohm
2,66 Ohm
Total impedance
0,5 Ohm
1 Ohm
2 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Voice coil
1+1 Ohm
2+2 Ohm
4+4 Ohm
Total impedance
0,25 Ohm
0,5 Ohm
1 Ohm
Total impedance
0,16 Ohm
0,33 Ohm
0,66 Ohm
6
Voice coil
Total impedance
EN
1+1 Ohm
2+2 Ohm
4+4 Ohm
0,125 Ohm
0, 5 Ohm2
0,5 Ohm
CAUT ION!!! High sound pressure can damage your health!
Please use the common sense when controlling volume!
5. WIRING DIAGRAMS
Connect the head unit (HU) to low-level inputs of the amplifier using RCA cable. Connection of the head unit
and remote control (optional).
DB-2000.1D, DB-4000.1D
Remote
control
8.8.8.
PRT
TEMP
MIN MAX
CLIP
PWR
VOLTAGE / TEMP
DB-5500.1D, DB-7500.1D, DB-12000.1D
PWR
VOLTAGE / TEMP
8.8.8.
Remote
PRT
TEMP
MIN MAX
CLIP
controle
STANDARD CONNECTION DIAGRAM
Connect the speaker cables from the plus and minus terminals of the speakers to the respective outputs on the amplifier
terminal marked with SPEAKER, as shown at the diagram. To connect the power supply the power wires with the diameter of 0
AWG (50 mm2) should be provided. 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 suffcient 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.
7
STANDARD CONNECTION DIAGRAM
DB-2000.1D
FU SE
HO LDE R
Battery
DB-4000.1D
+
-
Battery
not more 40 cm
FU SE
HO LD ER
EN
+
DB-5500.1D, DB-7500.1D, DB-12000.1D
-
8
+
not more 40 cm
-
Battery
FU SE H OL DE R
To provide the powerful audio systems the same amplifiers can be switched in pairs, in a
bridge circuit.
BRIDGE CONNECTION DIAGRAM
The two DB amplifiers connected to 2 ohms may be used for the serial connection.
The minimum operating resistance of one DB model is 1 ohm.
In a series connection of 2 pcs DB, the minimum resistance is 2 ohms.
Please read the following steps for accurate connection of the circuit in accordance with the scheme for
proper connection.
BRIDGE CONNECTION DIAGRAM
Amplifier connection:
Master: It is a master amplifier connected directly to the head unit (HU).
Slave: It is a slave amplifier connected to the output of the master amplifier.
Step 1. Connect the master amplifier to HU and put the switch on the control panel in position Output Master.
Step 2. Place the switch in position “Input Slave” on the control panel of the slave amplifier.
Step 3. Plug the RCA cable in the socket of the master amplifier designated as Master to the socket of the slave
amplifier designated as Slave, as shown in the Bridge Connection Diagram below.
DB-2000.1D, DB-4000.1D
Amplifier №1 (Master)
Amplifie ( )r №1 Slave
EN
DB-5500.1D, DB-7500.1D, DB-12000.1D
Amplifier №1 (Master)
Amplifier №2 (Slave)
9
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