Understanding the Causes of Engine Noise in Car Speakers
The noise engine coming from speakers can be annoying especially when listening to your own song. Most noise problems in audio systems usually come from any of three sources: ground, power source or alternator charging noise.
Before commencing treatment of sounds, it’s essential for us to know where the sound is coming from. An engine noise may be whining noise, or something other than engine noise, that depends on engine speed. You’ll be on the right track as soon as you know what is wrong.
Grounding Issues
If the vehicle’s grounding system is not installed correctly or if the wires are connected incorrectly during the installation of an aftermarket stereo, these problems can arise. In order to fix this problem, check the connections, wire location, and antenna lead.
Power Source Interferences
The engine noise in your car speaker can also come from the power source. Noise from power source can picked up by aftermarket radio. And result into buzzing sound. To combat this problem, a noise filter or upgraded cables to eliminate most noises may be suggest.
By effective shielding between themselves and surrounding electromagnetic fields as well with noise collection, cables can avoid interference due to power cables. With proper grounding of cables, distortion can also be minimized to the barest minimum.
Alternator Charging Noise
The alternator produces electrical noise that is picked up by the sound system when it is charging. A loose or inconsistent cable connection is often the cause of alternator noise.
To fix the noise of alternator charging, you can fit a filter or improve the earthing. The sound quality is not something you should take lightly. Fixing the problem allows you to feel strain-free in the future.
Solutions for Eliminating Engine Noises Through Car Speakers
Now that we have noted the main causes of engine sound in stereo, lets see the solution. Sometimes, putting a capacitor can eliminate any hiss sound as well.
A capacitor is advantageous frequency device because it has no impedance and will not reduce the level of battery supply. If these noises continue after you have installed a capacitor, try using another.
Improving Ground Connections
As mentioned before, improving power and ground connections is the main way to reduce whining noise. After checking all of the features, the first thing to check is the ground wire location and isolate the issue.
Using Noise Filters
You may be able to use a noise filter to eliminate or reduce hissing sounds. An inline noise suppressor, audio power filter, noise reducer, or suppressor can do a lot of good. Noise from the motor that the readers pick up gets quenched or gets interrupted before reaching the speakers.
Installing Ground Loop Isolators
These isolators are another effective alternative to relieve ground noise issues. This device grounds each amplifier to its own wire to minimize grounding problems caused by multiple amplifiers.
Dealing Poor Mounting
Improperly installing audio parts may cause sounds of engine in car stereo. If your car audio system has a bad ground connection poor grounding will occur from a faulty mounting. To end the problem again so that it does not occur again. Mount the amplifier with a rubber grommet or feet.
Replacing Defective Amp
In case of bad amps, you need a right replacement compatible with the car’s electrical system. If you are in doubt, consult a technician on what to do.
Install an inline power filter
You can also use an inline power filter to reduce high pitch noise. These filters help remove unwanted frequencies to get a cleaner sound.
Power filters work best when the power wires delivering power supply “dirty power,” or a mixture of irregularities that your head unit may struggle with. The same problems may help us in solving them for a more pleasant and quieter audio experience.
Troubleshooting Speaker Wiring and Ignition Noise In Your Car Audio System
The engine sounds depend heavily upon the speaker wiring. One can combat this issue by repositioning the wires. Also, shielding the wires with a magnetic shielding foil, such as Mu-metal, could reduce the distortion. Mu-metal foil is a nickel-iron alloy used as a material for magnetic shielding. It will protect speaker wire from interference.
You should also check for loose connections in the wiring of the speakers when you reposition and shield the wires. Assess wires and connections for damage or wear and test speaker connections with a multimeter.
Diagnosing and Fixing High-Pitch Whining Noise
To fix this problem, unplug the power harness from the head unit while testing the RCA cables and all power connections. Request assistance from a technician if you hear noise.
A second alternative would be to use an power filter. It can filter higher frequencies which create distortion. Hence, lesser power motor noise and motor distortion. An appropriate solution to these problems will make the audio experience more enjoyable and noise-free.
Fake Engine Noise Problems in Car Speakers
The other preventative step is the upgrade referred to “Big Three”. This is when you place large gauge wires in the vehicles battery charging wire, power wire, and chassis ground wires.
By taking such precautions, you will enjoy more sound from your sound system without any noise coming from through the exhaust pipes.
Getting engine noise pumped into the car’s audio system thru the alternator whine which rises and falls with the engine RPM. You can also install a ground loop isolator to connect the wire from the amp to the head unit.
Frequently Asked Questions: Make Sure You Read Them
How do I get rid of motor noise in my vehicle’s speaker?
To get rid of the motor noise coming through your vehicle radio, try using an inline noise suppressor, or alternatively, grounding one of the under-hood components. This should be able to resolve the issue.
Why is my car speaker making a weird noise?
Your car speaker is probably making odd noises because the head unit may be causing the interference because of an electrical disturbance from another device transmitting electric signals. You will check this by disconnecting your head unit and connecting another car radio in its place.
Is it normal to hear your car engine?
Your car engine does make noises that are normal and are not considered excessive. A louder than normal sound could indicate a problem with the engine’s carbon compression in one of its cylinders.


Especially helpful advice is to utilize a ground loop isolator and look for weak connections. Furthermore, the advice on using a noise filter and checking the head unit for problems is revolutionary. This book addresses all required skills to properly troubleshoot.