Hi ! I know it's an old problem, but recently i try to solve it and i must admit i don't know this fact about the Tuba Bass subwoofer. I use the good driver , but... always buzzing.... See this : Yep ! as you can see, the speaker is dead ! it seems over the year, the surround suspension is completly ripped off due to bad quality. Of course i need a new one, i buy an old 6930G for parts and the first time for me, i have this one : Yeah, that's the fact : 2 models of subwoofer exist ! This one is better and it sounds better ! PS : i make a Try with the native Realtek Driver (11th July 2017: 6.01.8210) perfect ! :O) it sounds good !