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Phase Test

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Do this test to confirm proper speaker phasing.

  1. Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit or the audio-navigation unit.
  2. Play track No. 2 (phase) at a normal, or slightly higher than normal, volume level.
  3. The voice should sound centered and focused when it is in-phase.
  4. The voice should sound diffused, and have less bass when it is out of phase.
    • If the voice changes from in-phase to out of phase as indicated by the prompt, the phasing is correct. Go to ELECTRICAL NOISE TEST .
    • If the voice always sounds out of phase, phasing is not correct. Check for:
      • Crossed speaker wire
      • Faulty amplifier
      • Faulty audio unit or audio-navigation unit
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