Asus MAXIMUS VII HERO Manual page 166

Sonic SenseAmp
Sonic SenseAmp is an exclusive ROG invention that is a built-in headphone AMP on onboard
audio with three AMP levels adjustment. It detects your headphone's impedance and adjusts
the built-in AMP accordingly.
Sonic SenseAmp only works on front panel.
When you plug a headphone into the front headphone jack, Sonic SenseAmp displays a pop-
up window that displays "Detecting headphone impedance".
After detecting the headphone's impedance, Sonic SenseAmp displays another pop-up
window similar to the one shown below.
Refer to the table below on the behavior of Sonic SenseAmp when adjusting the impedance
of the detected headphone:
32 ohm Amplify Level is automatically set at Performance
150 ohms Amplify Level is automatically set at Powerful
> 150 ohms Amplify Level is automatically set at Extreme
Other device The device plugged in detected as other device
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Chapter 4: Software support