A good while ago I posted on this newsgroup for advice about my crossover that give problem with constant low frequent noise to the speakers.
I even got the plan mailed over (thanks once again).
Due to money problems, it took a good while before I could give it in to the tech repair shop. And guess what: They did not find any wrong with the crossover. And when I came back home, connected it on again, the noise was not there.
Ghosts or what?