After seeing your comment I went and checked when I got my Logitech X-540 set, not quite as long, 14 years, but also still going strong. Probably far from ideal for an audiophile, but they've been fantastic for my needs and can still blast out great sound when they need to. Been hooked up to whatever media centre setup is on my TV since I got them, in fact they've been the only consistently connected piece of tech in that system in 14 years. Literally everything else has changed multiple times.
My old Logitech Z2300 2.1 set has been going for 15 years now. They've since been demoted to my work office instead of home office but I still blast them when everyone else has gone home.