Owner's Manual

11
7. SPECIFICATIONS
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 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.
3) The amplifier turns on but at a high volume it goes in to protection. Problem solution: The amplifier may lack power. Make
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.
8. POSSIBLE FAULTS AND THEIR SOLUTIONS
EN
Power RMS 4 Ohm* (W)
Power RMS 2 Ohm* (W)
Model
Low pass filter (Hz)
High pass filter (Hz)
Crossover (dB / Oct)
Frequency response (Hz)
Input sensitivity (V)
Signal to noise ratio (dB)
Integrated Fuse (Yes/No)
Input terminal connection (AWG / mm²)
Output terminal connection (AWG / mm²)
Working voltage (V)
Size (LхWхH mm)
Minimum permissible load impedance on the single channel (Ohm)
Minimum permissible load impedance in bridged mode (Ohm)
Size (LхWхH inch)
Bass level adjustment ( at 45 Hz)dB
*RMS Power at 14.4 V, THD 1%
Simultaneous operation of LPF and HPF
MLA-4080
80 x 4
120 x 4
10 -12 000
10 -12 000
12
10 - 20 000
0.2 - 6
90
10 - 15
4 / 21.2
338 x 216 х 50
2
4
13.3 x 8.5 х 1.97
240 x 2
8 / 8.37
0 / 6 / 12
Yes
MLA-4120
120 x 4
150 x 4
10 -12 000
10 -12 000
12
10 - 20 000
0.2 - 6
91
10 - 15
4 / 21.2
435 x 216 х 50
2
4
17.13 x 8.5 х 1.97
300 x 2
8 / 8.37
0 / 6 / 12
Yes
Yes Yes
Power RMS 4 Ohm bridged mode* (W)