Impedance
The impedance of a transducer is the complex load that it presents to the amplifier. Since all voice coils are made up of lengths of coiled wire, their impedance will have a reactive component that is frequency-dependent. The lowest impedance that a transducer can have at any frequency is the DC resistance of the voice coil. The M4 rated impedance is 8 ohms.
READ ON ABOUT THE M4
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