Audio Class: The Tools:

Audio Signal Levels & Impedance

• Microphone Level
  • Level: about 0.0001 v
  • Impedance: 150 W (Pro), 50KW (consumer)

• Line Level
  • Professional Level: 1.228 v Impedance: 600 W
  • Consumer Level: 0.75v, Impedance: 10K W

• Speaker Level:
  • Level: 5 to 200v (dependent on amp power)
  • Impedance: 4-16 W

• Phono Level
  • Level: about 0.0001 v, Impedance: 47K W
  • NOT the same as Mic! (EQ much different)

• Instrument Level
  • Level: about 0.005 v
  • Impedance: 50K W

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Audio Class © 1993 Richard Crowley