Midwest Audio Fest

It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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Measuring THD of audio circuits using line input?

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  • Measuring THD of audio circuits using line input?

    I have OmniMic, have been using it with the measurement mic on my DIY speaker projects. Works great.

    But now I want to measure THD and FR in a preamp. Can I substitute a line input for the mic input and measure the output of my circuit, using the test signal from the CD as the input?

  • #2
    Look at Room EQ Wizard or Rightmark Audio Analyzer.
    "I just use off the shelf textbook filters designed for a resistor of 8 ohms with
    exactly a Fc 3K for both drivers, anybody can do it." -Xmax