AVLS
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Automatic Volume Limiter System (AVLS) is an option, enabled through software or hardware, that limits the maximum volume level.
This can help prevent sound from escaping from the headphones, discomfort in the ears, and the possible danger resulting from being unable to hear what is going on around you when wearing headphones.
Select the checkbox to set a checkmark to prevent the volume from exceeding a certain level.
Depending on the model (and region?), when a total of 20 hours of playback is reached when this setting is off, the setting is automatically turned on:
| Model | Region | AVLS |
| PCH-1004 | 04  |
Yes |
| PCH-1104 | 04 |
Unknown |
| PCH-2000 ZA15 | 00  |
No |