You are driving on the road, and you turn up the volume to the max.
Suddenly, your car stereo goes off at high volume, and you can’t turn on the radio anymore. This is a problem that many people have, but not everyone knows how to fix.
The first thing you should do when this happens is check your antenna cable connection to make sure that it is connected properly. If so, then there may be a loose connection between your antenna and your radio tuner or amplifier. If this is the case, you will need to remove the back of your car stereo and reconnect it with some cable connectors, here are some ways to solve car stereo sound that cuts off at high volume.
How to Solve Car Stereo Sound that Cuts off at High Volume
Overall Audio Shutting off at High Volumes
Bad Ground
Audio cut outs or total power loss issues in audio systems can be caused by improperly performing grounds. One place to look is at the audio source.
Bad Connection to Power
If your stereo is not working, you have a problem with your power source.
Blown Speaker
A shorted speaker or bad connection is likely to cause distortion in your car. If the speaker is blown, it will cause a short. Your stereo sees a blown speaker or bad connection as an increase in resistance.
When a speaker goes out on your amp, the signal must go somewhere. If the amp doesn’t have a protection circuit, it will send all the power to the working speakers, which will most likely blow them. It’s best to get a new amp or protect the current one with a speaker-shorting circuit.
Impedance of a speaker in respects to the audio source
When installing an amp and a stereo, you need to know the impedance or resistance of your speakers. Your stereo will tell you what resistance level should be measured out by your amplifier in order for it to work properly.
For example, if your amplifier or stereo’s manual says you need a 4-ohm speaker system and you wire it for far under or far over that spec, you can damage your components and cause the audio to cut out.
Quick tip: The lower the resistance of a component, the more power it draws. If your radio or amp recommends 4 ohm, using 2 ohm speakers in your car instead of 4 will draw more power from your amp or radio causing issues at high volume.
4 channel or 5 channel amplifier not wired properly
If you don’t have a good amp, it will obviously affect your speakers. For example, if your amp has a bad ground or power connection, then all of your speakers will cut out.
The hardest problem to track down would be with the speakers themselves. When a system is amplified you have to consider the audio source (radio) and anything that alters the signal (amplifier).
Over powered system
When you connect an amplifier to speakers that are not rated for the same RMS level, the speakers will always be at risk. If you have a car battery that is healthy and power wiring, including a source of power like a CD player, your amplifier should match the RMS rating of your speakers.
For example, if your amplifier says it can produce 100 watts RMS, and you have 4 speakers, each speaker should be able to handle 25 watts RMS. If you hook up all the speakers in parallel, then you will get 100 watts RMS.
Subwoofer Cutting out at High Volumes
This section will discuss subwoofer cut outs. These issues have to do with the power or the signal of the amplifier, or the subwoofer itself.
Subwoofer amp not properly wired
When the amplifier responsible for powering your subwoofers is not properly wired, there can be an impedance issue. The issue occurs when your amplifier sees a higher or lower resistance coming from your speakers.
If you connect a subwoofer and leave one of the speaker wires loosely attached to the subwoofer terminal, the sub will work at low volume. But it will cut out at high volume because it’s similar to what was discussed above in the “overall audio shutting down at high volumes” section.
The amplifier is not powerful enough to power the speaker. That’s because there is a lot of resistance. So there is a voltage drop. The wires are probably not connected properly. You can fix it by measuring the voltage at the battery and then at the amplifier.
If you see that the voltage of your car battery is higher than the voltage of your amplifier, then there’s a problem in the connections to that battery or in the wiring.
Subwoofer not wired properly
The subwoofer wiring is part of the problem. It can cause resistance to be higher than it should be, or lower than it should be. This means that the amplifier (and/or the subwoofer) will suffer.
Wiring to Amplifier not big enough
When you play your subwoofer system too loud, it cuts off. Why? It’s because the power wires are too small for the amplifier. The battery can’t provide enough current to keep the amplifier powered. As you turn up the volume, your amplifier can’t draw enough power from the battery.
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