If your sub still makes noise, the most obvious way to tell if it is blown is to press the speaker cone on both sides. If the cone locks in place when pressed, it is likely blown. If the speaker cone moves on pressing, it could be due to a worn suspension. Low-volume audio can help you determine if the sub is blown. It is also a good idea to check the speaker coils with a multimeter, as they will give you a clear indication if the sub is in need of repair.
Symptoms
If your sub is making noises, you should consult an audio technician. Using a voltmeter, you can determine whether the sub has fully blown or if it’s merely not working properly. Make sure the cable for the sub is placed at a 90-degree angle to the rest of the audio cables. If the sub still doesn’t make any noise, it is possible that the speaker wires are corroded and need to be replaced.
If the audio source or cable are the only culprits, you may have a blown subwoofer. To diagnose the problem, you should listen to the audio source and subwoofer for any rubbing or rattling noises. When the pressure is applied to a subwoofer, it will make a “thumping” noise. If the sound is not present, check to see if the screws and bolts are tight.
Diagnosis
If you notice a scratching or roaring sound when you listen to your music, it’s time to repair your blown subwoofer. The best way to diagnose this problem is to check the resistance of the speaker cone. If the cone is damaged, you may notice zero or a reading that doesn’t stay in place. You can purchase a standard multimeter for this purpose on Amazon. Before you begin the repair, make sure you disconnect the power and audio inputs from your subwoofer. Next, remove the enclosure from the subwoofer and insert the red probe into the positive lead. Insert the black probe into the negative lead. Make sure that the resistance reading on the multimeter is at the maximum value. The multimeter should round up the number to the nearest whole number if it isn’t.
The blown sub is likely due to either too much power or a distorted incoming signal. Before diagnosing the problem, you should check the woofer’s movement and its coil. Also, check the incoming power source, which is the AC power outlet and the speaker cord connected to the subwoofer. If none of these steps resolve the problem, you’ll have to replace the subwoofer.
Repairing a blown subwoofer
Despite its name, a blown subwoofer will not be able to work to its maximum capacity. This is usually the case when it is blown due to a number of reasons, including too much volume or time spent at high intensity. It is also possible that the subwoofer has deteriorated due to a variety of other factors, including a faulty wiring. If you’re unsure as to the cause of your subwoofer’s failure, it’s recommended to get it checked out by a professional. If you can’t do this, you may be better off purchasing a new subwoofer. After all, a new subwoofer will perform better than an old one, right?
Depending on the subwoofer model, you may need to disassemble the subwoofer and examine its wiring. You might have to replace the spider or the fuses to fix the problem. If you’re not comfortable disassembling the subwoofer, you can always ask a professional for help. Besides that, you should check the amplifier and the subwoofer’s settings to make sure that they’re in the right place for proper operation.
Test for damage with a multimeter
A damaged subwoofer may not make noise, but it can be shaky and scratchy. The best way to check for a blown sub is to put your hand on its cone and listen. If it does not make any sounds, you probably have a blown sub. You can also use a multimeter to diagnose the problem. This device measures electrical resistance, or ohms.
The voice coil of a subwoofer is an important component to check for damage. If the voice coil is damaged, it will no longer make any noise. You can test the voice coil by unplugging the subwoofer, turning off the power source, and connecting the multimeter’s negative and positive probes to the speaker’s terminals. A large Ohm reading will indicate a blown subwoofer.
