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

V_RMS mV_RMS dBV dBu V_PP Max. voltage level no load

  mA, maximum output current

  ohm, output impedance of the amplifier

dB/V SPL dB/mW SPL 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

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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, - V_RMS где

• - - voltage drop depending on the impedance of the headphones and amplifier
• - - lowering the level of the volume control

Требуемый ток на нагрузке - Ом при напряжении - dBV:

• - dB(mA), - mA - без учета плотности музыкального сигнала
• - dB(mA), - mA - с учетом плотности музыкального сигнала ( - dB)