What are the filters applied in the Audio Adjustments ?

These settings can be found on the Remote Control page:

In order to control up to +6dB the audio adjustments, you need to set the “Audio Control Range MAX“ setting to +3 or +6dB in the Settings page of the WebUI.

Center Enhance

Type: Flat gain

Range: -6 to +6dB

Applied on: Center channel

Surround Enhance

Type: Flat gain

Range: -6 to +6dB

Applied on:

Before firmware 4.3r1: Surround Left&Right channels

Since firmware 4.3r1: all Surround, Heights and Ceiling channels

Sub Enhance

Type: Flat gain

Range: -6 to +6dB

Applied on: All Subwoofers channels

Bass

Type: Low Shelf

Frequency: 400 Hz

Range: -6 to +6 dB

Treble

Type: High Shelf

Frequency: 4kHz

Range: -6 to +6 dB

Brightness

Type: Tilt EQ

Frequency: centered on 1kHz

Range: -6 to +6dB

Example: If you set -XdB, you will have -XdB to the below 1kHz spectre, and +XdB to the above 1kHz spectre.