I decided we needed to change up to a better radio in the kitchen and I had the Advent 400 powered receiver but still needed to find the matching speaker. Now the unit I have has been in storage almost 20 years and the white plastic casing has yellowed like an early Apple computer - pretty nasty. I have read that some people have had luck with re-finishing so I went at it slowly with sandpaper - 600, 1000 and then 1600 grit wet sanding and then two steps of polishing with my automotive polisher,