Speaker impedance is a measure of the resistance of a speaker to the flow of electrical current. It is measured in ohms (), and it is an important factor to consider when matching speakers to amplifiers. If the impedance of a speaker is too high, the amplifier will not be able to provide enough power to drive the speaker, and the sound will be weak and distorted. If the impedance of a speaker is too low, the amplifier may be damaged.
There are a few different ways to check the impedance of a speaker. One way is to use a multimeter. Set the multimeter to the ohms setting, and then connect the probes to the speaker terminals. The multimeter will display the impedance of the speaker in ohms.