Hope this isn't a dumb question but...
I recently noticed a quiet but annoying buzz from my speakers ( Wharfedale 9.1s on the end of Arcam 8R/P). I checked connections etc to no avail though the buzz did subside a little when I pressed Direct on amp. Further investigation revealed the culprit to be my son's Dell laptop for which I'd just bought a cheap replacement AC adaptor.
So what's that about? Is it a common problem which can be solved by getting a new adaptor or does it reveal something wrong with my electrics/wiring?