(SOLVED) Klipsch Subwoofer No Power Light Issue

Norvan Martin
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In this guide, we will provide instructions and troubleshooting steps to take when the power light on your Klipsch subwoofer is not displayed.

Here we will tell you the causes of this issue and how you can resolve it. 

There are a few reasons why your Klipsch subwoofer may not show the power light. Connon issues include a blown fuse, issues with the AV receiver, the power switch in the standby position, a broken power source, or broken cables. Chances are slim if the cables are at fault in this situation, and there can be more problems as to why this may occur.

Before we continue, a quick fix to attempt is to reset your subwoofer. Of course, resetting to factory settings will erase all your settings. Refer to the Klipsch user manual before performing the reset.

We will now discuss other causes and the solution in detail below.

1. Subwoofer Connection Errors

Issue: There is a possibility that the subwoofer is connected to an RCA port that isn’t transmitting any audio or low-frequency content. If the connections are not done correctly, the power light will not switch on. 

Fix: Check where the subwoofer is connected to the receiver. It must be connected to a specific subwoofer channel or sub-out channel. Also, verify the type of cable used to connect the receiver and subwoofer- RCA cables/shielded subwoofer cables are often good choices. 

Check out the guides below on how to connect a subwoofer to a receiver in various ways:

2. Reciever Is Not Properly Set Up

Issue: When the receiver is not set up and plugged in correctly, the power light may not turn on at all. For this, you must ensure the subwoofer is correctly connected to the receiver and that all the relevant settings are correct.

Fix: Ensure that the receiver’s settings are set to ‘small’ for the speakers in the front or the system. The front (left, center, right) speakers will get all low-frequency content if the speakers are set to a Large or Full Range rather than the subwoofer. Once you have a subwoofer in your system, your front speakers should be set to ‘small’ regardless of their capabilities 

3. The Crossover Settings Are Incorrect

Issue: If there is no audio and the light is off, then there is a chance that the crossover settings are not correct. The crossover is probably too low if an audible space has no bass.

Fix: Ensure that the sub is turned on, and plugged in, and the sub cable is inserted into the LFE port on the subwoofer’s rear. Turn the gain knob at least halfway up on the sub’s rear. The opposite end of that sub-wire should not be connected to your receiver or sub-output.

Instead, grasp the unplugged end of the cable and repeatedly tap the male RCA post to hear if the sub will make a buzzing sound every time you do so. This is called the buzz test. 

The most common crossover frequency recommended (and the THX standard) is 80 Hz. However, you can check our guide on how to correctly set the crossover on a sub.

2. Issues With The Amplifier

Issue: Sometimes, you may see the light, but the audio does not come; you need to check your amplifier for this.

Fix: Check and verify if the amplifier is working correctly. You can check with another audio device or use a multimeter.

3. Fuse

Issue: Sometimes, for various reasons such as a power surge, your sub fuse may get blown. This may lead to the power light not turning on. 

Fix: If the fuse is blown, replace it with a new one of the same rating. Normally, all other components should be ok so you do not need to worry. Ensure that you consult the user manual or contact Klipsch customer support for guidance.

4.  Voltage Regulator Not Working Properly

Issue: There is a chance that the AVR or automatic voltage regulator isn’t detecting the subwoofer. 

Fix: You will need a technician to assist you with this check. He or she will need to verify that the regulator is supplying the required amount of voltage or power to drive the subwoofer.

5. Defective power switch

Issue: If the power switch is faulty, it may prevent the power light from turning on. Many subwoofers have a power switch on the rear panel with a standby mode that needs to be activated correctly.

Fix: Try toggling the switch on and off a few times to see if that resolves the issue. If the switch is still not functioning correctly, it may need to be replaced.

6. Faulty power supply

Issue: The power supply may malfunction, preventing the speaker from receiving power.

Fix: Check for faulty power supply. You will need some knowledge of electronics and a multimeter.

Solutions For The Main Causes

  • Blown Fuse: If the fuse is blown, replace it with a new one of the same rating.
  • AVR not passing power: Check the regulator and ensure that it is sending current to the subwoofer. Ask an electrician for assistance. 
  • Defective power switch: Try toggling the switch on and off a few times to see if that resolves the issue. If the switch is still not functioning correctly, it may need to be replaced.
  • Faulty power supply: Check for faulty power supply too. If there is one, change it. Also, check if the power cord is securely connected to both- the outlet and the speaker.

Frequently Asked Questions

1. Why is my subwoofer not powering on?

If your subwoofer’s power is not turning on, check the cable connections, fuse, and connection with the amp and receiver. Also, sometimes the power supply or the power source plays a role in this. Check for any overheating too. It may have burnt a component inside the subwoofer. 

2. Why is my Klipsch soundbar not working?

Sometimes, loose contact can play a role in this or some minor solvable glitch that requires no special tools. Try unplugging the soundbar from the power source, and make sure you turn the switch off and then unplug it. Now, put it back and turn the soundbar on.

That should do the work. 

3. Do Klipsch speakers have a fuse?

Yes, the speakers by Klipsch come with fuses. Each speaker has a pair of fuses- LF and HF each have their own.

4. How do I know if my subwoofer is blown?

Test the audio at a low volume to determine whether your sub has blown:

  • Distorted audio means it is partially blown.
  • A fully blown subwoofer is if no audio is coming out.



So, this is how you can fix the power light:

  • Check if the fuse has blown.
  • Correct connections, receivers, and amps.
  • Observe the crossover settings.
  • Check the AVR.
  • Locate the problem in the power supply and change it. 
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Norvan Martin is the founder of BoomSpeaker.com. 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