After activation, your A5 F5's MMI Sound settings gain a dedicated Subwoofer slider alongside the existing Treble and Bass controls.
This gives you independent control over the subwoofer output — separate from the general Bass slider. You can push the low end harder without affecting the mid-range, or pull it back for a cleaner sound profile.
The A5's cabin acoustics, particularly in the Sportback body style, benefit noticeably from being able to dial in the subwoofer level independently. The sealed cabin of the Coupe amplifies low frequencies, making fine-tuning especially worthwhile.