Ensure your front speakers are set to "Small" in your receiver settings. This forces the receiver to route low frequencies (usually below 80Hz) to the subwoofer channel.
When downloading your test videos, choose a file format compatible with your media player and AV receiver.
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This forces your computer or streaming device to send the raw audio data directly to your AV receiver to decode. Check Your Hardware Connections
The best choice. Connect your playback device directly to the AV receiver, or use the HDMI eARC port on your TV. Ensure your front speakers are set to "Small"
Listen to the subwoofer sweep to ensure there are no rattles in your room at low frequencies.
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Ensures the sound meant for the rear-right speaker actually plays from the rear-right speaker.