yep the LS sound and Naomi clones are all China Brand Tubes and China Brand 15K only chassis.
without sounding harsh. . . . . the cabs themselves are cool, the monitors. . . . . well. . . . . I personally never had any "real" problems with them except they needed degaussing several times with a degauss wand (the degauss coil on the China Brand monitors are soooo thin)
the problem with the china brand chassis is they DONT like to be rotated, over at our forum we had several peoples who have had chassis problems/flyback problems after tating the LS screens, I guess the weight of the flyback and the soldering on the cheap chassis played a big part in it.
dont get me wrong, they are great cabs for first timers or someone who wants something that looks minty fresh compared to a 2nd hand cabinet, but after awhile your gonna want to start thinking about replacing themonitor with something better.