// multi-utility computation suite · offline · instant · precise
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music.headphone-impedance-match Calculator
Calculates headphone sensitivity, required amplifier voltage swing, and power output for a target SPL from impedance and efficiency spec. High-impedance headphones (250–600 Ω) need headphone amplifiers — this shows exactly how much power is required.
Inputs
Headphone Ohms
Total opposition to AC current — combines resistance and reactance from capacitors/inductors.
Amp Output Ohms
Total opposition to AC current — combines resistance and reactance from capacitors/inductors.
Sensitivity Db
Reference formula or conversion factor shown for context.
Target Db
Reference formula or conversion factor shown for context.
Results
damping factor
A dimensionless multiplier applied in the calculation.
power needed (mW)
Sample size or count used in the calculation.
voltage needed (V RMS)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.
impedance match
Total opposition to AC current (Ω), combining resistance and reactance. Z = √(R² + X²). Maximum power transfer occurs when source and load impedances match.
sensitivity
Sample size or count used in the calculation.
rule of thumb
A widely used practical approximation or heuristic for this field — useful for quick estimates but not a substitute for rigorous calculation.