Hi Mike
Thank you for sharing the experience of the two Studers , I like to modify amps, parts don't charge by brand name, more you pay more you can get, I don't know the circuit of King-cello repro( active EQ or passive EQ ? any feed back ?) and what type of parts in use, if it can sound better than the stock mostly because of better parts in use, my dream circuit of repro amp ( I will do in future) is all tube, passive EQ, no feed back, all transformer coupling. I believe this one will provide the best sounding
tony ma