I just sold my svs 20-39 to my friend who has a sony reciever. He took it back home with him to where he lives 2.5 hours from here. It worked great for me but for some reason he is having a problem with it. There was a hum and there is no bass at all. He said the hum increased as he turned up the volume. He found that was because the connector was not pushed all the way in. Once he pushed it in the hum went away. Also he has the speakers set on small. Also he got some type of adapter at Curcuit City to extend the length of the better cable because it was not long enough. This was some blue and red wires. They are pure copy and the guy there said they should work fine. I would think some type of signal would get through. He told me on his sony receiver which has dolby digital and dts that he can not find the level adjustments of the speakers either for some reason. Wouldnt you think they are there? What are some things that I can tell him to do?