On line Calculator by Reference Audio Analyzer

Comparison and selection / On-Line calculators and converters / AMP Full

The calculation of the maximum SPL based on power characteristics of the amplifier

Link to this page with the selected parameters

Max. voltage level no load

  mA, maximum output current

  ohm, output impedance of the amplifier

Headphone sensitivity - dB/V

  ohm, Headphones impedance

 Average RMS Power for the music signal

 Peak factor in the unevenness of the music volume

 dBFS (the volume level in the player or DAC)


The value of the SPL with the level in dBFS for a saturated parcel of the composition

The average music signal of RMS: - dB SPL (Slow)
The volume level taking into account the unevenness for the music signal: - dB SPL
Peak level - dB SPL

Sufficient power for reproduction without distortion


Maximum SPL without overloading (large distortion) the amplifier and for recording the level in dBFS

For a sinusoidal signal: - dB SPL (Slow)
The average music signal of RMS - dB SPL (Slow)

Additional values and analysis

Specified maximum current at the amplifier output: - dB(mA), - mA

The signal level at the output of the amplifier with the setting of the lower level: - dBV, - VRMS где Требуемый ток на нагрузке - Ом при напряжении - dBV:

The calculator allows you to calculate the maximum sound pressure levels of headphones based on performance of the amplifier and of the main parameters headphones.

The main parameters are from the report measurement of headphones and headphone amplifiers, or passport from manufacturers.
The default for a musical signal, the value of the energy density is set to -12 dB

The level in dBFS for DACs, music players and sound cards you enter negative numbers: -6, -12, etc.


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