Everything you need to know about speaker impedance

Speaker Impedance

Speaker impedance is often considered one of the hardest concepts to understand when it comes to audio devices. Most people find it very difficult to understand it, so why don’t we try to simplify the concept? In this article, we are going to look at everything you need to know about speaker impedance. 

Okay, so what does speaker impedance mean?

In simple words, speaker impedance in the amount of current that can be drawn by the speaker from the amplifier. That’s it, it is that simple. The speaker impedance is measured in Ohms or in omega symbol. In technical words, speaker impedance is the resistance a speaker offers to the amplifier. The resistance is called as speaker impedance. Impedance or the word ‘impede’ is a synonym for ‘restrict’. But as the frequency keeps changing, the speaker impedance also keeps changing but there is an overall cap or limit on how much power can be drawn.

But what does this have to do with speakers?

As we saw above, speaker impedance means the resistance or restriction on the amount of power that can be drawn from the amplifier. So if the impedance is higher, then the speaker restriction on the amount of power drawn will also be higher which will result in a lower power drawn from the amplifier. If the impedance is lower, then the restriction on the amount of power drawn will also be lower. 

Speaker impedance decides how powerful your speaker can be. A low impedance speaker can deliver powerful audio and bass compared to a high impedance speaker.

You can measure speaker impedance with resistance level or the Ohms. The bigger the ohms number, the more the impedance, and the lower the ohms number, the lower the impedance. But the speaker impedances are not accurate, they may slightly fluctuate when high-frequency sounds are being played. They are also always equal to or greater than voice coil wire resistance. 


Speaker impedance is one of the most confused and misunderstood topic when it comes to speaker systems and in this article we have tried to solve your major doubts about it. Just remember that speaker impedance determines how powerful your audio is. Happy listening! 

Leave a Comment

Your email address will not be published.