B2 Audio MA 1000.4 Owner's Manual - page 2
GAIN
0.2V
4V
X-OVER
X-OVER
PRT
CLIP
PWR
X10
X1
HPF
600Hz
15Hz
LPF
4KHz
50Hz
X10
X1
LPF
4KHz
50Hz
HPF
600Hz
15Hz
LPF/BPF
HPF
FULL
CH3
CH4
CH1
CH2
INPUT
OUTPUT
L
R
RANGE
RANGE
GAIN
0.2V
4V
- 2 -
FEATURES
- 3 -
Use speakers with an impedance of 2 or 4 Ohms (4 to 8 Ohm when used as bridged amplifier)
Avoid installing the unit where:
- It would be subject to high temperatures, such as from direct sunlight or hot air from the heater.
- It would be exposed to rain or moisture.
- It would be subject to dust or dirt.
If your car is parked in direct sunlight and there is a considerable rise in temperature inside the car, allow the unit to cool
off before operation.
When installing the unit horizontally, be sure not to cover the heatsink fins with the floor carpet.
If this unit is placed too close to the car radio, an interference may occur. In this case, separate the amplifier from the car
radio.
This power amplifier employs a protection circuit to protect the transistors and speakers if the amplifier malfunctions.
Do not attempt to test the protection circuits by covering the heatsink or connecting improper loads.
Do not use the unit with a weak auto battery as its optimum performance depends on a normal battery supply voltage.
For safety reasons, keep the volume of your car audio system moderate so that you can still hear normal traffic sounds
outside your car.
If the fuse blows, check the power connection and replace the fuse. If the fuse blows again after replacement, there may be
an internal malfunction. In this case, consult your dealer.
WARNING:
Use the specified amperage fuse. Use of a higher amperage fuse may cause serious damage.
PROTECTION CIRCUIT:
This amplifier is provided with a protection circuit which operates in the following cases when:
the unit is overheated.
the speaker terminals are short circuited.
PRECAUTIONS
FUSE REPLACEMENT
GAIN
0.2V
4V
LPF
180Hz
40Hz
SUB
SONIC
50Hz
15Hz
BASS
FREQ
80Hz
30Hz
BASS
BOOST
12dB
0dB
PHASE
180°
0°
REMOTE
L
R
IN
OUT
BRIDGE
INPUT
PROTECT
POWER
LPF/BPF
HPF
FULL
X-OVER
RANGE
PROTECT
CLIP
POWER
GAIN
LPF
HPF
0.2V
4V
4KHz
50Hz
600Hz
15Hz
X10
X1
OUTPUT
INPUT
CH1
CH2
L
R
1000.4 FOUR CHANNEL
1000.2 TWO CHANNEL
2000.1 CLASS D MONO BLOCK
2
2 Ohm stable in stereo mode
4 Ohm stable in bridge mode
Silver plated connectors
Low level input
Variable LPF : 50Hz - 4KHz
Variable HPF :15Hz - 600Hz
Gain (input level) controls
Thermal protection
Short circuit protection
Clip indicator
Class D Mono Block
Class D Monoblock power amplifier
Silver plated connectors
Low level input
Bass Boost Centered: 0dB-12dB
Variable LPF : 40Hz - 180Hz
Variable Subsonic:15Hz-50Hz
Bass Boost Frequency Control:30Hz-80Hz
Phase Control:0°-180°
Gain (input level) controls
Remote Level Control
Thermal protection
Short circuit protection
power amplifier
2 Ohm stable in stereo mode
4 Ohm stable in bridge mode
Silver plated connectors
Low level input
Variable LPF : 50Hz - 4KHz
Variable HPF :15Hz - 600Hz
Gain (input level) controls
Thermal protection
Short circuit protection
Clip indicator
WIRING INSTRUCTIONS
POWER CONNECTION
The battery terminal (BATT) must be connected directly to the positive terminal of the vehicle battery to provide an
adequate voltage source and minimize noise. Connecting the battery terminal lead to any other point (such as the fuse
block) will reduce the power output and may cause noise and distortion. Use only #12 gauge or thicker (smaller gauge
#) wire for this lead and connect it to the terminal of the battery after all other wiring is completed.
GROUND CONNECTION
The ground terminal (GND) connection is also critical to the correct operation of the amplifier. Use a wire of the same
gauge as the power connection (#8 or thicker) and connect it between the ground terminal(GND) of the amplifier and a
metal part of the vehicle close to the mounting location. This wire should be as short as possible and any paint or rust at
the grounding point should be scraped away to provide a clean metal surface to which the end of the ground wire can be
screwed or bolted.
REMOTE TURN-ON CONNECTION
The amplifier is turned on by applying +12V to the remote turn-on terminal (REM). The wire lead to this terminal should
be connected to the "Auto-Antenna" lead from the car stereo which will provide the +12V only when the car stereo is
turned on . If the car stereo does not provide an "Auto-Antenna" lead, the remote turn-on lead may be wired to an
"Accessory" or "Radio" terminal in the car's fuse block. This will turn the amplifier on and off with the ignition key,
regardless of whether the car stereo is on or off. The remote turn-on lead does not carry large currents. So #16 gauge
wire may be used for this application.
SPEAKER CONNECTIONS
Depending on the type and number of speakers used with the amplifier wire them to the speaker terminals as per the
appropriate wiring diagram. For most applications # 18 gauge wire should be used for the speaker leads but in no case
thinner than # 16 gauge. For leads is excess of 10 feet #12 gauge is recommended. When wiring the speakers, pay
careful attention to the polarity of the terminals on the speakers and make certain they correspond to the polarity of the
corresponding terminals on the amplifier. Do not ground any speaker leads to the chassis of the vehicle.
2 Channel
4 Channel
x 10
Crossover switch
x10
Crossover switch
Channel power amplifier
4 Channel
1 Ohm stable
2 Ohm stable in linked mode
This unit is designed for negative ground 10-15 Volts (DC) operation only.
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