Subwoofer Keeps Disconnecting From Soundbar (Fixes)

Norvan Martin
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If your subwoofer keeps disconnecting and reconnecting from your soundbar causing a loss of bass for a second or two every few minutes, we will help you fix that in this article. 

The main reasons your subwoofer may keep disconnecting from your soundbar include the source device issues, connectivity, or settings like auto channel switching, and auto power on.

This is particularly common with LG soundboards. Sometimes, this issue occurs even after installing the subwoofer for the first time. However, it can occur with any brand, from larger brands like LG to smaller brands like Roku. subwoofer and soundbar

So, if your subwoofer is disconnected and reconnecting itself ever so often, take the following steps to fix it. 

Before we go on, please note that there are separate fixes when your subwoofer is not pairing with your soundbar or when your subwoofer is pulsating like a heartbeat but not disconnecting fully. 

Quick Troubleshooting Steps

Before going into more detailed steps, we have prepared a quick troubleshooting check that you should go through. Please note that resetting your soundbar will change all settings back to factory settings. Here are the steps:

Very Quick Reboot and Reset Method:

  1. Turn the soundbar off
  2. Unplug the soundbar power cord from the power outlet
  3. Wait 30 seconds
  4. Reconnect the power cord
  5. Wait 30 seconds for the system to reboot

if that didn’t fix the problem, try the method below. 

Detailed Reboot and Reset Method:

  1. Turn off the soundbar
  2. Unplug the soundbar from the power outlet while leaving the subwoofer connected to the rest of the system
  3. Press the reset button on the subwoofer and hold it for 10 seconds
  4. Now release – the green light will be flashing (or some other indicator). 
  5. Wait for about 30 seconds and then turn the subwoofer back on 
  6. Now wait for the connection and see what happens

If that didn’t work, carry on to the detailed steps below. 

By the way, if you are trying to connect without a remote, check out our article on how to connect a Samsung soundbar to a subwoofer without a remote.

1. Check The Source Device

If the quick troubleshooting checks did not work, it’s now time to check the source device. Check The Source Device subwoofer and soundbar disconnecting

This way, you will make sure the issue is with the subwoofer and not the device you’re listening to.

For instance, if the sound only drops out when you are watching a Blu-ray movie, then the issue is with the connections or the Blu-ray player or the Blu-ray player itself, not the subwoofer.

2. Check Connectivity Issues

First, confirm the subwoofer is in the range of the soundbar if your devices use wireless communication.

Check what the range of your soundbar is and check how far the subwoofer is away from it.

Check Connectivity Issues soundbar and subwoofer keep disconnecting

Also, you need to ensure that the sub is not too close to the router. move it to at least 8 feet away from the router and move it closer to the soundbar. 

You want to do this because the signal from the router may interfere with the signal between the soundbar and the sub.

It is a generally good idea to keep all your WiFi equipment at least 20 feet from the speaker system. However, remember, that the maximum wireless signal transmission distance is about 33 feet.

You should also ensure that your subwoofer is moved further away from devices that may be emitting wireless signals and RF waves such as microwave ovens, cell phones, WIFI, Bluetooth devices, etc.

What If Your Media Room Is Small?

If your home theater or media room is very small and you can’t move the devices far away from each other, there are alternatives.

One easy DIY method is to wrap aluminum foil around the speaker’s side of the modem or WiFi router. This will block the WiFi signal and allow you to keep your soundbar closed. 

Why Does Wireless Interference Occur?

Well, many different devices may use the same wireless frequency (2.4 GHz). If these are near the soundbar and subwoofer, interference may cause some sound interruption due to a physical obstruction between the soundbar and subwoofer or another device on the same frequency.

So, make sure nothing running on a 2.4GHz bandwidth (i.e. anything that uses Bluetooth) is near the soundbar/sub.

3. Disable Router Auto Channel Switching

If your soundbar uses WiFi, your router channel settings are very important. 

What are WiFi channels?

A WiFi channel is a medium through which wireless networks transmit data. For example, the router that transmits on the 2.4 GHz band has 11 channels and the 5 GHz band has 45 channels.Disable Router Auto Channel Switching

If your router channels are set to auto (auto-channel switching), this may be what is causing your subwoofer to cut out. Disable this audio setting and configure your network to use a consistent wireless broadcast channel. 

You can change your channels to say 11 and 161 to fix the issue. The point is, that you should change the wireless broadcast channel to one that is not in use by any other networks around you. If you are unable to do this yourself, connect your ISP for assistance. 

4. Disable Auto Power On Feature

The auto power-on feature can be quite a useful one for saving power and reducing unnecessary subwoofer hum

However, it can be quite a disadvantage as well. The auto-on feature is used to turn on the subwoofer automatically only when the sub detects a signal through the LFE output.

This means that the subwoofer won’t turn on with auto-on automatically when the A/V receiver is turned on. This can also cause the sub to drop if the signal is not strong enough. Remember, different subwoofers have different sensitivities as far as the auto-on feature is concerned. 

5. Proximity and Alignment

While interference can cause your subwoofer to cut out intermittently, so can actual physical barriers or having the sub too far from the soundbar. subwoofer and soundbar proximity connection interference

You need to make sure that the soundbar is within a good range of your subwoofer so that the signal is strong and maintained. 

You should also ensure that there are no great obstructions in the way between the soundbar and the subwoofer. This includes walls, devices, and so on. 

Sometimes, alignment helps as well. Try aligning the soundbar and subwoofer in parallel or perpendicularly instead of being horizontally aligned and see if this fixes the issue. Remember, sound wave direction is very important for interference to occur. 


Why Does My Subwoofer Keep Disconnecting From the Soundbar?

This can happen when there is some sort of electronic interference (due to another nearby device) or a physical impediment between the soundbar and the wireless subwoofer. Either of these can cause the sound to drop off. What you can do is try updating the firmware version, resetting the subwoofer, and reconnecting it.

How Do I Keep My Subwoofer With A Soundbar?

Your subwoofer should be right up in the front of the room along with the soundbar for the best synchrony of sound seeing as the sub reproduces the lower sound frequencies and the rest of the speakers can focus on reproducing crisp high-frequency sounds.

Keep the front of the subwoofer clear and free of all obstructions to permit a free and unhindered bass sound.

How Do I Stop My Subwoofer From Cutting Out?

First, try rebooting the sub. If this doesn’t work, turn off the sub and check all of the connections to ensure there is no damage or disconnection. Replace any damaged cables or wires.

Why Does My Sound Bar Keep Losing Sound?

It could either be caused by electromagnetic or Bluetooth interference which can be rectified by rearranging the electronic devices around the soundbar, or it could be that the subwoofer is aging or malfunctioning. In this case, the soundbar should be turned off and left for a while before it is rebooted.

Is This A Common LG Problem?

If you have an LG soundbar, it is very important that you check the soundbar and not just the subwoofer.

We have found that in many instances, the issue is really with the LG soundbar, especially the LG SL6Y, SL7Y, SL8Y, SK9Y, SL8YG, and so on. Many people who have purchased these devices complain about their connectivity issues.

Subwoofer Keeps Disconnecting From LG Soundbar

If you purchased the device new, return it if under warranty or send it in for servicing. In either case, don’t let LG send you the same device, instead upgrade to a different one. 

If you purchased the device used, you may need to exhaust all the options we have presented. 

The fact is, as far as these devices are concerned, LG has just made very poor-quality products and as far as we have seen, there is very little that can be done to remedy the problem. Something was very wrong with LG’s quality control when these devices were produced. 

In most cases, even new LG soundbars start cutting out right after installation usually for a second or two every few minutes. The common telltale sign is that the green light on the subwoofer would turn off and back on every time the cut-out happens. 

If you are looking for a good soundbar, many other brands offer good options such as Sony or Samsung. 


Having a subwoofer disconnect and then reconnect itself every so often is quite annoying. If you have tried all the options we have presented to fix your issues with your subwoofer and soundbar disconnecting intermittently, we hope you have found a solution and now have steady bass coming from the subwoofer.

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Norvan Martin is the founder of He is a professional Electronics Engineer and is passionate about home theater systems and AV electronics. BoomSpeaker was created as an online hub to share his knowledge and experiences as it relates to home theaters and home audio electronics. My email: [email protected]  Connect on Pinterest and Linkedin