Impedance
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Headphone Impedance Explained: Ohms, Voltage and Amps
Headphone impedance in ohms sets how much voltage your source must swing, not sound quality. The numbers, the 1/8 rule and when you need an amp.
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Balanced vs Single-Ended Headphone Amp: Specs Compared
The spec-based guide compares balanced and single-ended headphone amp outputs by power, noise, impedance, connectors, and when extra headroom matters.
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Matching a DAC and Headphone Amp to Your Headphones
How impedance, sensitivity, output power, output impedance and SINAD figures combine to decide whether an amplifier suits the headphones you own.