So, whats the fix?
It may help the next geek : )
I took a closer look to speaker and I saw that 1 wire is cutted. Then I had a 2nd problem- Wire was too short to weld it together with second part. So I took wire from something else and wrapped them together. Then I melted metal a bit, so wire can't suddenly disconnect.
In other forum I found that speaker will only work with reciever, because PC isn't giving enough power.
Then I had an idea- I could power my speaker from subwoofer. http://failiem.lv/viewer.php?i=jbhweav&n=Hmm.JPG
I only needed to change 2 Pin DIM connector to 3.5mm connector. I did it by wrapping 2 wires from speaker around 3.5mm connector(1 wire at middle of 3.5mm and 1 wire at bottom of connector).http://failiem.lv/viewer.php?i=uthoshc&n=Connector.JPG
Then I connected speaker to my subwoofer and it worked! Speaker wasn't really good. I think it's because subwoofer isn't giving enough power and while melting wires I burnt a hole in speaker.