Celsus MRA-470D, Быстрый старт, Страница: 6 / 6

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In all modes and configurations the input gain ( SENS ) should be
tested and tuned in accordance with the speakers and audio source
used. This requires a multi-meter. GAIN IS NOT VOLUME
CONTROL.
Gain (SENS) is used to match the input of the amplifier to the source
unit. The higher the sensitivity the sooner the amplifier will reach
maximum output.

‘FREQ’
(Crossover control) The variable crossover on the
amplifier allows the adjustment of cross over frequency

‘HPF’
(High Pass Filter) configures filter to attenuate
frequencies below the selected filter frequency

‘LPF’
(Low Pass Filter) configures the filter to attenuate
frequencies above the selected filter frequency

‘FULL’
Full Range operation of all frequencies.
H.) Troubleshooting
Problem Cause Solution
Does not sound
right
Speaker are not connected
correctly
Refer to experienced
installer
Control panel settings are wrong
Amplifier does
not turn on
Controller/ Head unit was not on Turn on source
Faulty Fuse
Remove fuse and check
continuity. Replace fuse if
necessary
Poor connection integrity
Check ‘+12V’ and ‘Ground’
cables for pinched wires.
Ensure tight connections.
Balance
reversed
Speaker L & R reversed
Correct speaker wire
orientation
Output distorted
Volume set too high at source Lower volume
Amplifier gain set too high Lower gain (SENS)
Whining or
ticking noise
while the engine
is ON
Amplifier is picking up alternator or
radiated noise
Move audio cable away
from power cables
Turn down input gain
(SENS)
Check the alternator and/or
voltage regulator. Test for
weak battery.
Specifications
Output power at 4 OHM 70W x 4
Output power at 2 OHM 120W x 4
Output power at 4 OHM Bridged 200W x 2
Waterproof level IPX7
Total Harmonic Distortion <1%
S/N Ratio Ref 1W @ 4 OHM >90dB
Gain Range 0.2V
– 5V
Crossover Range 40Hz
– 500Hz
Frequency Range 20Hz
– 20KHz