Before you clean, you may want to look on the underside of the top pieces for the manufacturing date (mine is 7/6/96, exactly 20 years ago today). I used eyeglass cleaner to get the top wood piece polished (Windex would work as well). Mine were a bit dirty when I got them, so I found out: soap and water works excellently on the main speaker cabinet. I'm really glad I took the chance on them. Pair them with good components and they'll really shine (I'm powering them with a Nakamichi PA-5, but they sounded great with my Kenwood KR-5030 as well). These speakers sound as good off-axis as they do on-axis, just without the imaging of the sweet spot of course. The Radiant Sound Field (RSF) really does help imaging and off-axis response. They sound amazing! They're smoother, tighter, and go lower than my Boston Acoustics VR40s (their TOTL for $1400/pair in 1995), and I'm leaning towards using them in my stereo system over the Bostons. I knew they were something special when I went to pick them up and they were 60-65 pounds apiece.

I realize this is an old thread, but I recently picked up a pair of Eosone RSF 600s for $150 at a thrift store.