Bazooka MA275D User manual

OWNER'S MANUAL
CAR POWER AMPLIFIER
MODEL:MA275D

INSTRUCTIONS FOR FUNCTIONS AND CONTROLS
Q INDICATOR LIGHT
When pow LED sends out blue light, it means that this amplifier have being working now.
When protection LED sends
out red light, it means that the self-protection of the amplifier.
f) HIGH INPUT
High level
input terminals.
f) TREBLE BOOST
The boostranges from OdB to 12dB.
0 BASSBOOST
The boostranges from OdB to 12dB.
0 X-OVER Optional switches for high pass filter(HPF)/full pass filter(FLAT)/Iow passfilter(LPF).
G) HPF/LPF
High passfrequency adjusting knob and Lowpass
frequency adjusting knob,
thefrequency ranges from
50Hz to 500Hz.
8 GAIN Knob for volume adjustment.
Q LOWINPUT
Left and right channels inputs of the amplifier system. Preamplifier outputs of a
source
(head unit,CD player,DAT,etc.) or of an external electronic
crossover must be connected to them.
0 REMOTE CONTROLLER OUTLET
To be connected with the remote controller, which helps to boostthe gain.
Pisturn the knob
of volume to be maximum before using the remote.
G) SPEAKER Speaker connecting terminals.
G FUSE Standard automatic fuse, you must use the same powerfuse if you need to change it.
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ELECTRICAL CONNECTION
CD +12V
Anode of power connection terminals,Connect to the anode of car battery.
REM
Terminal to be connected with Remote cable, which comesfrom the sourceand
which controls
the amplifier switching on.Appliedvoltage mustbe between10and
15VDC.
GND
Groundterminai,Connect to the car chassis,Keep the length of the ground cable
to a minimum.
REMOTE CONTROLLER
Volume level knob ,the boostranges from 0.2V to +6V.
+12¥ REIIIIITE SliD
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chassisConnect to
ground ofve hicle*
1- BATTERY+I
SPECIFICATIONS
Model
RMS
Power@ 14.4VDC
Power@ 4 Ohms
Power@ 2 Ohms
Bridged
Power@ 4 Ohms
Min. SpeakerImpedance
THDDistortion
FrequencyResponse
InputSensitivity
InputImpedance
Signal-to-Noise Ratio
Channel Seoaration
Remote gain control
CrossoverNetwork
Low PassFilter
High Pass Filter
Bass Boost
Treble Boost
Fuse Rating
Size
LxWxH
Page2
Co nnect to +12Vof batterywith
ppropriateFUSEvalue.a
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r&'i- -~· -.. !
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·-- .. ·-
Connect to remote
turn-on lead
of
source unit.
MA275D
70WX2
100WX2
170WX1
20hm
0.1%
20Hz-20KHz
0.2V-6V
10K
90dB
55 dB
0.2V-+6V
50Hz-500Hz
50Hz-500Hz
OdB-+12dB
OdB-+12dB
20Ax1
231x135x44mmmm

SYSTEMWIRING
2 CHANNEL STEREOCONFIGURATI_O_N
------'
SPEAKERIMPEDANCE2-80hm
Page3
Connect to remoteturn·on
lead
of sourceunit.
Connect
to remote
turn-on lead
of
sourceunit.

SYSTEM WIRING
BRIDGED MODECONFIGURATION
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SPEAKERIMPEDANCE4-80hm
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Connect
to remoteturn-on
lead
of sourceunit.
..
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BATTERY
~
Connect to remote
turn-on lead
of
sourceunit.

TROUBLESHOOTING
Before removing your amplifier,refer to the list belowand follow the
suggested procedures. Always test the speakers and their wiresfirst.
AMPLIFIER WILL NOT POWER UP.
Check for good ground connection.
Check
that remote DCterminal has at least 1 OV DC.
Check
that there is battery poweron the+ terminal.
Check all FUSES.
Check
that Protection LED is not lit.lf it is lit, shut off amplifier briefly and then repower it.
HIGH HISS
OR ENGINE NOISE(ALTERNATORWHINE) IN SPEAKERS.
Disconnect all RCAinputs to the amplifier, if hiss/noise disappears ,then
plug in the
component driving the amplifier and unplug its inputs. If hiss/
noise disappears, go on until the faulty/noisy component is found.
It is best to set the amplifier input level as insensitive as possible. The best
subjective S/N ratio is obtainable
this way .Try to drive as high a signal level
from the head unitas possible.
PROTECTION
LED COMES ONWHEN THE AMPLIFIER IS POWERED UP.
Check
for shorts on speaker leads.
Check
that volume control on the head unit isturned down low.
Remove speaker leads ,and reset
the amplifier. If the Protection LED still comes on,
then the amplifier isfaulty.
The
amplifier will shut down automaticallywhen the units· temperature goes up to 85"C
This will protect the unitsfrom damage.
AMPLIFIER'S GETS VERY HOT.
Check that the minimum speaker impedance for that model is correct.
Check for speaker shorts.
Check that there isgood airflow around the amplifier.In some applications,
an external cooling fan may be required.
DISTORTEDSOUND.
Check that the Level control's is set to match the signal level of the head unit.
Check that all crossoverfrequencies have been properly set.
Check for shorts on the speaker leads.
HIGH SQUEAL NOISE FROM SPEAKERS.
This isalways caused by a poorly grounded RCApatch cord.
WARNINGI
1. Over high volume will damage your speakers.
2. Be cautious when you use the
amplifier near gasoline tankand electric wires.
3.
Protect the connecting wires and parts to avoid any damage or short circuit.
4. The power
must belee from the anode of the battery via FUSE.
5. The sound system
must be in turning-off situation when you check the amplifier.
6. Be sure that you use the same type of FUSEwhen you need to replace it.
* We reserve the right to make needed change or improvementto the product.
without informing customer about this in advance.
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