I'm probably one of the few, but paradoxically, I deliberately changed this Chinese version in my Marshall box JCM900 from 1993 for flood speakers of the old UK production. In the last couple of years, I tried and changed several amplifiers, until I finally came to the conclusion that I had the best one at home a long time ago, and my sound "problem" had been sleeping right in the box for years - or. inappropriate repraks. Otherwise, my conclusion is as follows: if you play and like a more modern sound for rock, or metal music, I definitely recommend the CHINESE version of this rep, as it has more high mids and treble than the old UK version. On the contrary, the UK version is more suitable for old school sounds, bluesrock, etc., but mainly all-tube devices such as JCM800, etc. My configuration is: Marshall JMP-1 -> Marshall JFX-1 -> Palmer Macht402 -> Marshall JCM900 1960A + Chinese speaker ... and finally I'm satisfied with the sound :-)