Hi,
I´m not the most analytical of listeners and tend to go by gut feeling. All I can say at present is that the difference between my original PRPs and the Schinkohs in the load impedance slots was really quite shocking. I haven´t gone back to listening to the PRPs since then as time is tight. I suppose the fact that most of the resistors in my Piccolo are PRPs may have lead to a concentration of "defects" of the marque along with their inherent "qualities" which were counterbalanced to some extent by the different characteristics (whichever they may be) of the Shinkohs but all of a sudden detail improved (or at least I became aware of lots of micro-information that I was not aware of before. Having first heard the battery operated "standard" Piccolo and now mine with the Bugle P/S, Black gates etc. a la tubesforever, I don´t know if there are 2 Piccolos that sound identical but there is no doubt in my mind that a systematic, analytical approach would allow someone to tailor his sound to suit his system, speakers and room and even the music he listens to but the most I aspire to at present is to try some matched 0,01% Vishay nudes when I have time.