Rok2id - They likely simply don't know how to. Ric, for example, got his start building and modding amps about 3 decades ago. Along the way he picked up how to modify different caps (by that I mean the caps themselves are physically modded, on top of choosing alternative brands to stock), circuits and the like and, in the process, uncovering, very often only by trial and error, which caps or circuits are amenable to what kind of mods - in effect a whole body of expertise unto itself.
Oppo got their start with inexpensive players that were originally designed to be disposable, but, gradually and smartly over the years, became more concerned with improving performance by becoming increasingly comprehensive in the best "by-the-book" sense - separating themselves from the rest of the market by refusing to cut the same corners that their competition has. They've simply managed to parlay that philosophy into a dynasty.
But, that whole kind of mod approach ends up being something that, understandably, not too many guys in white lab coats can easily grasp or come by. Two profoundly differing fields of expertise, experience and philosophical approaches. One can be thought of as a 'science' and the other as an 'art'. The engineering principles can be 'taught', the modding principles must be 'learned'. Regards. John
