The impedance of a headphone refers to the electrical resistance experienced by the current flowing through the headphone. Impedance is generally expressed in ohms (Ω), and its size determines the circuit state of the earphone when outputting external power and its ability to respond to audio signal frequency. Different headphone impedances correspond to different power requirements of ear amplifiers and sound source devices.
In general audio devices, the impedance of headphones usually includes 8 Ω, 16 Ω, 32 Ω, 64 Ω, 80 Ω, and other types, and headphones with different impedances can achieve higher sound quality performance and power output. Usually, low impedance headphones are more suitable for low-power output devices such as mobile phones, while high impedance headphones are more suitable for professional audio devices, amplifiers, and DACs.
When selecting headphones, we also need to consider the impedance of the headphones and the matching issue between external devices to ensure the best sound quality performance and equipment safety when using the headphones. At the same time, when using high impedance headphones, we also need to consider the issues of ear amplifier power and output impedance to avoid adverse effects such as excessive amplification, distortion, and popping. Therefore, when choosing headphones and external devices, we need to pay attention to matching issues and match them reasonably to achieve the best audio experience.
