xps 13 9350 - bad sound quality (flat and dull)

Hello Dell Community,

Since I updated my Windows 10 to Creators update, the only compatible sound drivers available are the Realtek Audio ones, which make the sound in my headphones dull, flat and there is absolutely no bass (I use 400$ Sennheisers).
I tried disabling the Audio enhancements in the settings tab, but the Realtek drivers do not offer such thing as an enhancement.
When I try updating the drivers in Device manager and picking a driver from the list there is this Windows driver which makes the bass and sound better BUT a constant sizzling is found (even on the speakers when headphones are not plugged in) which makes it unusable.
As a DJ, my job is listening and buying new music every day and for 2 weeks I am using my smartphone.

Looking forward to your response and a possible solution!

Cheers,
Rob