Tried to connect ground to chassis, but to no avail. Hum! So the built-in amp runs ungrounded from now on...

I just ordered a new power cable for my sub, but the darn ~^

After having fooled around with my cable for a week, the postal service finally decided to deliver! A**hats!

I connected it this afternoon, and it sounds sweet! The bass is tighter, deeper, faster and sounds more natural on the first CD (Paul Banks: Time problem). I also tested it with other cd's, eg sampler cd's with fantastic bass. Same impression, tight, deep and fast bass. Both Fenders and acoustic basses, bass drums and male voices have benefitted. Even pianos! Perhaps it's because my sub has an itsy-bitsy 150W amp built in, but wow, I'm impressed!

Actually it has improved on the soundstage too. All in all a lot better than what I expected, but feared would not happen

BTW, it's a Xindak PC-03, a Chinese power cable, but great for bass!