I think I have discovered the company with the best customer service in the world, Bowers & Wilkins. My speakers were making a humming noise. I tried everything to fix it, but it wouldn't go away. I contacted them and they have made it right. More than that though, they were delightful to deal with. At every stage I've been kept informed and updated. And the speakers are bloody brilliant as well. I can't account for musical taste, but as I type Tom Petty's Free Fallin; has never sounded so gorgeous.