Before you perform Auto Calibration, check the following items:

• Set up and connect the speakers.
• Do not connect any microphones other than the supplied optimizer microphone to the AUTO CAL MIC jack.
• If using a bi-amplifier connection or speakers with a front B connection, set the assignment for the SPEAKERS SURROUND BACK/BI-AMP/FRONT HIGH/FRONT B terminals properly. For details, see “Setting the assignment for the speaker terminals (SB Assign) (for STR-DH750 only).”
• Set the speaker output to a setting other than [SPK OFF]. For details, see “Selecting the front speakers (for STR-DH750 only).”
• Disconnect the headphones.
• Remove any obstructions between the optimizer microphone and the speakers.
• For accurate measurement, make sure the environment is quiet and free from noise.

Note

• The speakers emit very loud sound during the calibration and the volume cannot be adjusted. Be considerate of your neighbor and any children who are present.
• If the muting function has been activated before you perform Auto Calibration, the muting function will shut off automatically.
• It may not be possible to take the correct measurements or to perform Auto Calibration at all if special speakers such as dipole speakers are used.