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How to Repair a Subwoofer with NO Sound

How to Repair a Subwoofer with NO Sound [Easy Guide]

You finally installed your new home theater, and after preparing your couch, a disaster happens (overreaction, but I hope you understand!).

Your subwoofer has no sound, and you wished only one thing: “How to repair a subwoofer with no sound.”

Well, if you can see visuals but no audio, this guide will come to your rescue. Let’s begin:

(Want to check what to do when nothing works? Cut through the chase here!)

🕵️‍♂️Perform A Complete Audit of All Components of Your Subwoofer.

check each components

Here’s how to do this:

  • First, check whether the subwoofer is connected to the MIX or SUB output of the audio system or TV.
  • Do ensure that the subwoofer’s power cable is connected to a working AC outlet.
  • Now, turn on the subwoofer.
  • Finally, check that the subwoofer is not muffled.
Recommended Reading: Top 10 Subwoofer Boxes [Tested]

🎚️Is The Volume of Your Home Theater Alright?

examine volume

When you’re having problems with your home theater system, double-checking your home theater receiver settings might make a significant difference.

It’s really simple to set it and forget it, which means you can mute your system and then forget about it when you return to it.

Depending on the brand and type of your receiver, it may or may not include the features or options listed below.



Many A/V Receivers have volume knobs with no predetermined minimum or maximum level and can be pushed endlessly in either direction. It helps determine your volume level by simply looking at the knob difficult. Make sure your volume is set high enough to hear all of your speakers.

Some A/V receivers include a Muting or Mute button that does not have an indicator lamp to indicate that it is in use. When you turn on or off this button, make sure your receiver isn’t quiet.

If your A/V receiver has a speech selection knob, you may not hear audio, or you may listen to distorted or feeble audio. Depending on where your speakers are attached to the receiver’s back, you may need to adjust this button.

You have to ensure that your headphones are not connected to your home theater. Asking me why I heard you ask?

Simple. You will not get any sound from your speakers if your headphones are connected.

🤓Is Your Home Theatre on the Right Input?

right inputs

Your television and A/V receiver components may need to make various “input” or “source” settings to discover sound and picture effectively.

It is determined by the cables utilized and the number of components installed in all home theaters. This is unique. These instructions explain how to check and adjust the input settings of your components to ensure they are correct.

If you are getting no sound or video without sound, your system’s inputs are to blame. Your speakers may have been programmed with the wrong information.

Also Read: How To Test If Your Subwoofer Is Blown

👍To detect and alter sources on your television, follow these steps:

  • Use the Input or Source button to find your remote TV.
  • To begin cycling on the screen, press the Input or Source button on the TV’s remote.
  • If you want to test the input choice after it has been obtained, stop pressing the input button. After a few seconds, the television returns to the input selection.
  • Typically, your system is connected to an HDMI connection, which allows a single cable to provide sound and video to the TV.

🖐️To check your A/V receiver for changing sources, do the following:

  • Some A/V receivers have knobs for changing the input or source.
  • For specific inputs, others use actual buttons rather than knobs.
  • Alternatively, most A/V receivers are linked to their remote control, which has input and source buttons.
  • To select an input or source, rotate the button or click it.

💁‍♂️Using test tones, check the speakers.

If you do not hear any sound from the speakers connected to your receiver, it is still time to test whether the receiver can produce sound through these speakers.



Most receptors include a “speaker setup” option that not only raises the volume of specific speakers but also allows test tones to be delivered to a single speaker or the entire system at once. You can choose whether the recipient can broadcast audio to its attached speakers.

👩‍🏫Study Your Home Theatre Cabling

examine your cables

If you cannot hear test tones from several of your speakers, the next step is to double-check that all speaker cabling linked to the receiver’s back is connected correctly and in good working order.

There are several methods for connecting speaker cables to receivers. Check that the bare wires of each speaker cable are in good contact with the binding posts, poles, or ports and haven’t come loose.

  • If your A/V receiver has spring-loaded clips, ensure that the bare wire is fully inserted and make good contact with each port. If wires are pulled on, this connection is prone to breaking loose.
  • If your A/V receiver has binding posts or poles, ensure that the speaker wires do not come loose or slide out while tightening or relocating the receiver.

Some speaker wiring is not color-coded for positive and negative and instead uses text labels or a single line to differentiate between the two. Check that the positive and negative ends are properly connected to both the receiver and each speaker.

Aside from the speakers, make sure that all of the receiver’s other connections are securely and wholly connected.

Also Read: How To Power Passive Speakers 

🔎Cross-check the Amplifier’s Power

examine amplifier power

It is vital to know that your amplifier may still turn on even if it does not receive the necessary voltage or power. When the amp receives less voltage, it appears to be working, but the subs do not receive any signal.

Use a voltmeter to measure the voltage on your amp’s negative and positive terminals to troubleshoot. Check to see if the voltage is between 12 and 14 volts. This is the proper reading for a properly functioning amplifier. If the voltmeter reads anything less than 12 volts, you may have a low voltage problem.

Examine the battery connections, ground and power cables at the fuse block, grounding bolt, and any other location in the power system that could become loose. A faulty connection in the ground wire will cause it to malfunction. Remove any built-in fuse switches from your amplifier and test their continuity.

If the fuse is in good working order, your multimeter will read virtually 0 ohms.

If the fuse blows, you should consider replacing it with the correct fuse for your amplifier, as the incorrect one can damage it. If the new fuse blows after installation, you may be dealing with a wiring issue. Always remember to cut off the power before removing or replacing a fuse.

😯When troubleshooting your amps power system, be sure to check:

troubleshooting

Top Troubleshooting Tips

The remote wires: These wires originate from the radio and play an essential function in your sound system. If they are damaged or poorly wired, they will not provide the correct output to subwoofers, resulting in no sound.

The power wire: Damaged or shorter power lines cannot provide sufficient current to the amp.

Impedance mismatching: When your sub’s impedance mismatches that of your amplifier, it might produce an irritating or distorted sound due to under or overpowering the amp.

🔬Examine Your Sub’s Electromagnetic Coil and Cone Seal

electromagnetic coils

If your amp turns on, but there is no sound from the subs, you should inspect the electromagnetic coil and cone seal.

This is one of the most delicate and thorough exams you may be required to undertake.

Begin by removing the subwoofer. Examine how the cone is attached to the container once you access the inside components. The cone of your subwoofer is in charge of providing the final audio output. It moves back and forth, pushing and pulling air. If the seal is broken or loose, it will not move properly and create sound.



If the sub’s electromagnetic coil is burnt or out of place, it will not generate the intense electromagnetic field required to work with the sub’s magnet to make a sound.

🥼Check to See Whether the Subwoofer Has Been Short-Circuited.

short circuit

One of the most common reasons for active subwoofer and speaker issues. Any metallic object that comes into contact with the negative and positive rods at the terminal and cone of the sub will rapidly short out the system.

Short-circuiting is a complex problem to discover. You’ll only notice it when you switch on the amp, but there’s no sound from the sub. To rule out a short circuit, connect your sub to another amplifier. If there is still no sound, it could be because the cables have burned and no electrical signal is being transmitted to the sub.

Let us see what Quora experts want to say,

“Confirm it’s plugged in and turned on

Quora Expert

According to Redditors,

“First: Put the amp in 5ch mode, and ensure the RCA’s are in the correct output of the radio.”

Redditor

Second, test your subwoofer. You have to put the wires to a battery (like 9v) after disconnecting it from the amplifier. If the sub makes a pop, it’s working. If there is no response from the sub, know for sure that they are blown. There is one more possibility: wires have been physically disconnected from the subwoofer (but you have to double-check for this).

Finally, you have to test your input. Here’s how it works. Find a 3.5 mm to a RCA cable and pair your smartphone into the amp input. Play some music and check if it’s works. Yes, and you have signal issues (bad radio or cable). No, and you have an amp issue.

For final confirmation: make use of your test speaker and wire. If nothing gets played, your amp is the cause of your trouble for sure.

😥If the home theatre sound system still does not work, do this!

If you still don’t have sound on your home theater system after verifying everything and changing the settings, don’t hesitate to contact the product’s manufacturer for more information.

If possible, connect a second subwoofer to the transmitting equipment to check that the transmitter does not cause the hardware problem.

If the second active subwoofer works, the first is almost definitely faulty.

🙋‍♂️Final Words

As you can see, repairing the subwoofer for home theater without sound is simple. It is critical to take the time to identify and diagnose the problem to repair it effectively. You might be able to handle specific difficulties quickly and easily if you have a little patience.

If the subwoofer does not turn on at all or turns on but does not play anything, it is most likely faulty and must be replaced.

And, before you start shopping, brush up on the fundamentals of subwoofers, so you know what will work best for you. That is why we strongly advise you to get professional assistance, especially if you are new to automotive audio.

💡Got More Questions on How to Repair a Subwoofer with NO Sound?

any more question

1. How can I know if my subwoofer is blown?

Ans. Poor sound quality is one of the most apparent indications of a blown sub. If you hear any crackles, it’s time to do an audio test.

2. How do you check to see if your subwoofer is operational?

Ans. Normally, turning on the power will test whether or not your subwoofer is operational. If there is no sound, make sure the frequency is adjusted correctly. You have a problem with your subwoofer if it is appropriately placed. Likewise, if the sound is not crisp and clear, the subwoofer could be destroyed.

3. How long can a subwoofer be used?

Ans. A good quality automotive subwoofer will typically endure for 4 to 10 years, with some lasting much longer. Of course, this will differ depending on a variety of things.

4. What is the ideal location for a subwoofer?

Ans. Placing a subwoofer in a room’s corner can boost its output, making it sound louder. A subwoofer (particularly a wireless subwoofer) has the advantage of being able to be placed practically anywhere on your floor space. There is no algorithm for determining the ideal location. Furthermore, it is all your personal preference.

5. What is the procedure for resetting a subwoofer?

Ans. Press and hold the Power button while also pressing the Input and VOL- buttons (at the same time). Release the buttons when RESET appears on the front panel display. For 30 seconds, unplug the power cord. Connect the power cord to the soundbar and turn it on.

6. Is it necessary for me to have more than one subwoofer?

Ans. Several subwoofers may fill in the gaps when achieving even bass dispersion is complex. In this decision and placement, seek the advice of your audio professional.

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