The output of a given microphone delivers the same power whether it is low or high impedance.

Most professional microphones are low impedance, about 200 Ω or lower.

This is usually accomplished by providing multiple interconnected pathways of low electrical impedance to the ground.

The system commonly uses an analogue power amplifier matched to the low impedance of the transmission loop.

One tactic is simply to shield the device, by enclosing it in a metal or plastic box of low impedance.

If a reactance is in parallel with the source, the effective network matches from high to low impedance.

Today they are typically used only in canalphones and hearing aids due to their diminutive size and low impedance.

Liquids, including blood have a low impedance, which means that little energy will be reflected and no visualization possible.

The capacitance on the output is often neglected since it sees and amplifier outputs are typically low impedance.

The low impedance of its input and internal nodes makes it possible to bias the circuit for operation at frequencies up to .