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Ticking or
Whine that
changes
with engine
RPM
Constant
Whine
Specifications
OUTPUT CHANNELS (LEFT/RIGHT)
INPUT CHANNELS (LEFT/RIGHT)
INPUT RANGE OF GAIN CONTROL (dB)
MAXIMUM INPUT VOLTAGE (V)
INPUT IMPEDANCE (K-OHMS)
MAXIMUM OUTPUT VOLTAGE
VOLUME GAIN (dB)
-3dB LOW PASS FREQUENCY (Hz)
LOW PASS/HIGH PASS SLOPE/OCTAVE
EQUALIZATION FREQUENCIES (Hz)
EQUALIZATION CYT OR BOOST (dB)
DISTORTION AT 1kHz - 1V (%)
CHANNEL SEPARATION AT 1kHz (dB)
SIGNAL TO NOISE RATIO (dB)
FREQUENCY RESPONSE (Hz) (-1dB)
1) This problem could be caused by radiation pickup of RCA cables
that are too close to a fuel pump or a distributor.
2) Check that the head unit ground is connected straight to the
vehicle chassis and does not use factory wiring for ground.
3) Try to supply the head unit with a clean +12 volt supply directly
from the battery +, instead of using a supply from the in-dash
wiring/fusebox.
This type of noise can be more difficult to pinpoint, but is usually
caused by some kind of instability, causing oscillations in the
system.
1) Check all connections, (especially for good grounds).
2) Make sure that no speaker leads are shorting to exposed metal
on the vehicle chassis.
3) RCA cable are notorious for their problematic nature, so check
that these are good, especially the shield connections.
FRONT/REAR/SUBWOOFER
RCA/CD, High Level, AUX 3.5mm
>40
>10
>20
>9
>85
60>80>120
12
50,125,315,750,2.2kHz,6kHz,16kHz
12
.01
>80
>100
10-50K
8
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