I did. When i heard the 686's before it was on the end of a kandy amp and we were listening to them at very high volume levels ( amp at 12 0 clock).They sounded stunning at that volume. Yesterday we listened to the 686's and RS1's at normal listening levels ( about 9.30-10 o clock on the amp). The 686's were awful at low or mid volume. They really sounded dull ( as you said in another post). They had a dull boxy sound with no bottom end or treble extension and a veiled midrange.My amp is not a powerhouse but it does have a bit of oomph and it drove the RS1's well so i don't think it was the amp. The sensitivity of the 686's is 84db and i bet it was that. If you crank the amp they sound superb with real punch and arguably a better soundstage than the RS1's.They were not as clear and open as the RS1's though, or as detailed, but there was not much in it. The high volume req'd to get them to sound good is totally impractical though as most folk, including myself, can't play music at that volume at home. We needed the amp at 11 o clock or more before they came alive. I did not demo the 685's as they are a bit big, but i bet they don't have the same problem.The RS1's were good at low and mid volume with perhaps just a touch of real bottom end punch at lower volumes being the only thing missing.They still had plenty of punch though and are far superior to the original S1's in that respect, which is interesting as MA used the same drivers.They are ruthless speakers though and really show up duff production on cd's but with well produced stuff they are unreal. Got them in cherry.