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Article: LINE vs MIC Inputs: Understanding the Difference

LINE vs MIC Inputs: Understanding the Difference

LINE and MIC inputs serve different purposes in audio equipment:

  • MIC inputs: Designed for low-level signals from microphones (-60 to -40 dBV)
  • LINE inputs: Built for high-level signals from devices like phones, keyboards, or audio interfaces (+4 dBu or -10 dBV)

Can You Connect a Microphone to LINE Input?

Yes, but the signal will be extremely quiet and unusable without amplification. You'll need a preamp to boost the microphone signal to line level.

Can You Connect Line-Level Devices to MIC Input?

Yes, but the signal will be too hot and likely distort. Use a DI box (Direct Input) or attenuator to reduce the signal to microphone level.

Solutions for Mismatched Connections

For Microphones → LINE Input:

  • Use a microphone preamp
  • Use an audio interface with built-in preamps

For Line-Level → MIC Input:

  • Use a DI box
  • Use an inline attenuator pad
  • Lower the output volume on the source device

Quick Reference

Input Type Signal Level Common Sources
MIC -60 to -40 dBV Microphones
LINE +4 dBu/-10 dBV Phones, keyboards, mixers

For best results, always match your device to the appropriate input type.

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