What Is Impedance in Headphones and Does It Matter?
Published: June 25, 2025 | Category: Technology
Impedance is the electrical resistance a headphone presents to your source device. Measured in ohms (Ω), it determines whether your headphone needs a dedicated amplifier or can be driven by a phone. Low impedance (16-32Ω) means easy to drive. High impedance (250-600Ω) means better sound but requires an amp. Here’s what it means for your listening.
Low Impedance (16-32Ω)
Most consumer headphones: Sony WH-1000XM5 (32Ω), AirPods Pro 2 (not applicable), Bose QC Ultra (35Ω). These draw very little power and work fine plugged directly into phones, laptops, and tablets. The trade-off: lower impedance drivers tend to have less precise control, which can mean slightly higher distortion at high volumes. But modern designs have largely closed this gap.
High Impedance (250-600Ω)
Studio and audiophile headphones: Sennheiser HD 600 (300Ω), Beyerdynamic DT 880 Pro (250Ω), AKG K712 Pro (62Ω — a middle ground). These require significantly more voltage to reach full volume. Plugging a 300Ω headphone into a phone produces barely audible sound. You need a dedicated headphone amplifier (Schitt Magni, FiiO E10K, or similar) to drive them properly. The benefit: higher impedance allows more driver windings, which translates to better control, lower distortion, and more accurate sound reproduction.
Does Higher Impedance Mean Better Sound?
No. Impedance is not a quality metric — it’s a design choice. A well-designed 32Ω headphone can sound better than a poorly designed 300Ω headphone. The Beyerdynamic DT 770 Pro (80Ω) and DT 990 Pro (250Ω) use the same driver design — just different impedance versions. Sound quality is nearly identical; the only difference is how much power they need. Choose impedance based on your source device, not sound quality expectations.
My Take
Here’s my take: impedance matters only in relation to your source. If you listen from your phone, buy 16-32Ω headphones. If you have a desktop amp, 250-600Ω is fine. Don’t buy an amp just to drive high-impedance headphones unless you’re committed to the hobby. The Beyerdynamic DT 770 Pro 80Ω ($179) is the sweet spot — works with both phones and amps, giving you flexibility.
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