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Microphone Impedance Differences General knowledge.

Low-impedance and high-impedance refer to the output impedance of a microphone, and this characteristic affects how the microphone interacts with audio equipment and cables. Here's a brief overview of the differences:

Impedance Value:

Low-impedance microphones typically have an impedance value of less than 600 ohms.

High-impedance microphones can have impedance values from 10,000 ohms to 100,000 ohms or more.

Cable Length:

Low-impedance microphones can use long cables without significant signal loss or degradation. This makes them preferable for professional and stage applications.

High-impedance microphones are more susceptible to signal loss and interference, especially over longer cable lengths. They are best suited for short cable runs.

Sound Quality:

Low-impedance microphones generally offer better frequency response and overall sound quality.

High-impedance microphones might not deliver as accurate or clear a sound, especially over longer distances.


Low-impedance microphones often use balanced XLR connectors, which help reject interference and maintain signal integrity over long distances.

High-impedance microphones may use unbalanced 1/4-inch connectors, making them more susceptible to interference.


Low-impedance microphones are more common in professional settings like studios, live performances, and broadcasting.

High-impedance microphones are often found in consumer-grade equipment, like some karaoke machines and older PA systems.


It's possible to convert a high-impedance signal to a low-impedance signal with a transformer, but the reverse isn't always straightforward or recommended.

When choosing a microphone, it's essential to consider the specific needs of your application. For professional audio quality and longer cable runs, low-impedance microphones are the better choice.

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