IMPORTANT: This article applies only to specific products and/or operating systems. Check the Applicable Products and Categories section of this article before starting these steps.
This issue can be resolved by turning the A.VOL (Auto volume) setting OFF. Follow these steps to turn on the setting:
Note: When the A.VOL (Auto volume) setting is On, the volume adjusts automatically depending on the input signal or content from a connected device.
- On the remote control, press the MENU button.
- Select AUDIO → A.VOL → OFF.
Note: To select the item you want, press the ↑ (upper), ↓ ( lower), or ENTER button repeatedly. You can return to the previous layer by pressing the BACK button. - Press the MENU button to turn off the menu.
If the issue is still unresolved, try to reset the system.
- Press the MENU button on the remote control.
- Select RESET by pressing the ↑ (upper) or ↓ (lower) button.
- When ALL RESET appears on the front panel display, press the ENTER button, and then the system settings returns to the factory default.
If you cannot perform a reset using the Setting Menu, press and hold 
(power) and – (volume) on the subwoofer for more than 5 seconds. The settings return to their initial status.
- On the remote control, press and hold the NIGHT button for more than 5 seconds.
- When A.VOL appears in the front panel display, select OFF by pressing the volume +/- button.
- Wait until the displayed setting (OFF) disappears from the front panel display.
If the issue is still unresolved, try to reset the system.
- Press and hold (power) and – (volume) on the subwoofer for more than 5 seconds.
- Disconnect the AC power cord (mains lead), and then plug it back in.
