Headphone Impedance: When Do You Really Need an Amplifier?

The ohm rating on a headphone shows how much power it needs to play loud enough and stay clean.

Key Points

• A 32 ohm headphone usually works fine with a phone or laptop, without an extra DAC or amplifier.
• A 250 ohm studio model needs more voltage, so an amplifier will make the sound more open and dynamic.
• Also check the sensitivity in dB; high sensitivity means the headphone is easier to drive.
• If maximum volume feels barely enough or the bass sounds thin, your source is running short of power.

Match the impedance to your source first; an amplifier only helps when there is a real shortage of power.

Note: this article is dummy demo content and is not professional advice.