Calibrating the SPL Reading

Calibrating the SPL reading gives REW an absolute SPL reference by entering a reading from your SPL meter while a speaker or subwoofer calibration signal is playing.

SPL Calibration Procedure

  1. Select the Mic/Meter tab of the Settings panel
  2. If using an SPL meter set it to C weighting and tick the C Weighted SPL Meter box in the Mic/Meter Settings. Set the meter range to suit the measurement level used in the check levels process (the 80dB range is recommended for the Radio Shack meter). If using a mic and preamp leave the C Weighted SPL Meter box unticked
  3. Choose whether to calibrate the meter reading using your subwoofer or a main speaker driven by a calibration signal generated within REW, or to use a test signal you provide, making the appropriate selection in the drop-down box in the Calibration panel.
    Choose SPL Cal Signal

  4. Press the Calibrate SPL button Calibrate SPL button
  5. Enter the reading from your SPL meter in the calibration panel and press Finished when done
    Calibrating the SPL Reading

The SPL Calibration process can also be run from the SPL Meter panel

SPL Calibration Notes

REW is now ready to make measurements.

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