Is speaker impedance, which is measured in ohms, important? Plus, do you need to match speaker and receiver ohm ratings?

The electrical field that causes this movement is created by an amplifier. How difficult the driver or drivers are to move is the part of what makes up the speaker's impedance, which is rated in ohms.

ECISTM (Electric Cell-Substrate Impedance Sensing) is the only commercially available technology which continuously monitors TEER under dynamic flow conditions. In their natural environment, ...