I just got the latest Hifi News magazine and, as usual, the same ridiculously expensive mains cables etc are being pimped. I usually just skim over that crap, after admiring how pretty it is, but this ...

We have a new garage door opener installed recently. The unit emits a distinct low level hum/buzz noise, and and a slight vibration can be felt when you put your hand on the cover. Clearly coming from ...