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One of the most common mistakes people make when checking to see if a speaker is blown is to put their ear up to the speaker and listen for a change in sound.
The problem with this method is that it can be difficult to determine what that sound should sound like, and it may be difficult to hear anything at all.
If you’re not sure if your speaker is blown or not, use this guide as an easy way to check.
Test If a Speaker is Blown
All loudspeakers are electro-mechanical transducers, which convert an electrical audio signal into mechanical audio waves.
The purpose of the voice coil is to oscillate the cone or dome. A small signal is applied across the voice coil, which causes it to move back and forth.
The cone or dome is a very important part of any speaker.
When the cone or dome becomes disattached, partially or fully from the coil, then there is no help for you… the speaker is blown.
Here is all should you do to test your speaker.
STEP 1: Listen to the speaker. We have made a list of the best songs to test your speakers, so choose one or more songs and test the sound of the device. If you’re hearing a distorted sound, and the audio sounds noticeably off, then this is a sign of a blown speaker.
STEP 2: It is important to determine, if there is no sound coming from your speaker or if there is a just sonic fuzz. If there is no sound, make sure everything is hooked up properly by checking the connections. You should know that a speaker is blown when there is no sound or you listen to hugely distorted sound.
STEP 3: Use a multimeter. If you want to test your speaker for an issue, a multimeter can be very helpful. A multimeter is a device used to measure voltage, current, and resistance. It is an electronic measuring instrument that produces a digital display of the measured values. You can use this to check whether or not the speaker is producing any sound whatsoever.
Here is what to do: Turn the stereo off. Plug a multimeter into the speaker terminals and read the impedance. A blown-out speaker will read as “Infinite”, but a fully functional speaker should give you a reading of “1.”
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