• Setting up the AVR's menu is a critical step.
• Make sure all specialty settings like night mode, dynamic loudness, or any "sound enhancers" are turned off.
• Normalize all the speaker levels; set them to zero or at least to the same level.
• Normalize all the speaker distance or time delay settings to be the same.
• Make sure the speaker configuration matches the speakers in the system.
• HAA recommends the subwoofer crossover be set to 80 Hz. It's rarely necessary to change it but that can be during calibration if needed.
• Make sure any customization of Dolby Surround or DTS Neo settings are neutral.
• Flatten out any tone control settings and make sure any EQ including Audysey or similar are off.
• Check the wiring on the back of the AVR is solid and correctly connected.
• Don't forget to neutralize or bypass any external EQs.