Interesting, to say the least. I was happy with the Shuguang Black Treasures until I decided to try the Royal Princess. No comparison. I usually read reviews with skepticism. However, in this case, Jeff Day was absolutely right. The Royal Princess give up nothing in terms of sonics and added a liquidity and musicality that were missing in the Black Treasures. Two caveats about the Royal Princess: (1) My first pair drew a high current - 68mA - and tripped my amplifier's protective circuit. Richard Wu willingly swapped them for ones that draw 41mA. (2) They generate a bit more heat than the Black Treasures. (BTW. . .Sophia Electric was a pleasure to deal with.) I have a pair of Takatsuki TA-300b on order. . . an expensive was to satisfy curiosity. The rave report of the Takatsukis that was syndicated in Six Moons used an amplifier made by the same manufacturer as my 300b SET.