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21
PROBLEM
Distortion, background noise,
crackling, or hissing in the
speakers
Sound is too low
Amp keeps blowing fuses
5. Noise can be picked up due to bad RCA cables. Specially the super cheap ones. We recommend doing a
test with different RCA cables. Replace the RCA cables if needed.
6. Low-quality speaker wires will also cause noise. We recommend you buy high-quality insulated speaker
wire made for vehicle applications.
1. This can be caused by wiring at too high of an impedance (ohms) and the amp puts out low power, at 4
or 8 ohms for example. To resolve this, you will have to properly wire your speakers/subs to the amplier.
2. Check the gain level on the amp. You may need to turn it up.
3. Power and ground wire that are too thin of a gauge size for the amplier may cause low sound. Determine
the proper wire gauge necessary and replace existing wires.
4. Make sure your positive and negative speaker wires are not reversed, as this would cause the sub to move
but not make much noise.
5. Check your HPF control setting on your amplier. You may need to lter out more high frequencies, which
your sub is not meant to play. Try lowering the frequency of that LPF control and see if that helps.
6. On your receiver it is very common to have a volume level control for the preamp outputs (separate from
your master volume control). To x this, you can navigate to the audio settings, and search for subwoofer
level controls, as well as front and rear preamp output controls. Crank up the level on this setting and you
will be back in business.
7. Amplier may not be powerful enough. If this is the case, we recommend upgrading to a more powerful
amplier.
Main Fuse - If you determine that your main fuse is blowing, then you’ll want to pay attention to when it
blows. Try inserting a good, properly rated fuse with your head unit—and amplier—turned off. If the fuse
blows immediately, when everything is off, then you’re probably dealing with some kind of short in the power
cable between the main fuse and the distribution block, or between the main fuse and the amplier if there
is no distribution block in the system.
CAUSE/SOLUTION
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