I've been using an old Kinyo 5.1 which I originally had for the Xbox -- as it was the cheapest thing I could find with an optical connection. I've always had to keep the subwoofer disconnected, otherwise my flatmate panics and thinks it's an earthquake.

Last week I was spotifying while I worked, and all of a sudden the speakers screamed full-power, just about blew the windows out. I pulled the plug, and tried it when it had cooled down a bit, and it seemed to work, until yesterday when it started making extra noises I had to permanently retire it.

So it would be the ideal time to replace it with something modern, and not so... budget.