Line Level to Microphone Level

When connecting an iPhone or iPad to an audio mixer.

First, the voltage levels do not match.

Voltage Levels

Level TypedBVolts
Line Level (0VU)+4dBu1.228 volts RMS
Line Level Consumer-10dBV0.316 volts RMS
Instrument Level-20 dBu
Microphone Level-60dBV to -40 dBV0.001 to 0.01V volts RMS
  • 0dB is 1V RMS
  • 0dBV is 0.775V RMS

Attenuation Links

Passive Attenuators

Stereo line level to mono microphone level

Line level signal to microphone input adapter

All About Pads

Using iPad/iPhone headphone jack for audio input


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