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Mic and Line Inputs

The ASP8024-HE microphone preamp uses a transformerless eight-transistor design. Each channel also has a separate DAW/Tape return, allowing the recording input and playback return to be available at the same time.

ASP8024-HE Mic Line and DAW Tape input controls

Input meters​

The channel meters show the Mic/Line and DAW/Tape return levels in dBu.

  • By default the large meter displays the DAW/Tape return.
  • The small meter displays the Mic/Line input.
  • MTR FLIP swaps those meter sources.
  • The OVER indication warns that the measured path is approaching overload.

DAW/Tape return controls​

  • INSERT ACTIVE places the DAW/Tape insert return in the playback/mix path.
  • TRIM adjusts the DAW/Tape return level by ±15 dB for gain staging.

Mic/Line controls​

  • LINE selects the Line input instead of the Mic input.
  • INSERT ACTIVE places the Mic/Line insert in the recording input path.
  • GAIN provides 6 to 60 dB of gain on Mic and -14 to 40 dB on Line.
  • POLARITY (Ø) reverses the input polarity.
  • 48V supplies phantom power for microphones that require it.
  • HPF engages the 75 Hz high-pass filter on the Mic/Line signal.
Phantom power

Mute the relevant channel and reduce speaker/headphone monitoring before switching 48 V on or off. Only use phantom power with equipment designed to accept it.

The physical Mic/Line insert and DAW/Tape insert remain associated with their input circuits even when CH FLIP swaps the sources between LF and SF.

Continue to Routing and Auxiliaries.