hi,thnx for your anwser,of course its an active subwoofer,my set up is just right,5.1 speakers ,all connections are double/triple checked
and all speakers checkout fine (including sub) when i test them at realtek sound manager.I just cant take analog signal at sub when i play movies/music/youtube etc...
as for drivers,till now i have tested old gigabyte's cd driver v2.55 ,gigabyte's site new driver v2.65 and realtek's newest v2.66.The only one that can make the sub to take signal is v2.55 by checking the option "fill speakers" and "bass managment" ,two options that the two new drivers are missing.I use win7 home premium x64.