does anyone on this forum use groneberg power cables? i have overlooked this aspect of my system until now but this is something that i feel i need to address. is it true that sources and preamplifiers benefit more from aftermarket powercords than power amplifiers do? is there a dramatic difference between stock and aftermarket powercords? i am looking for input from people who use aftermarket powercords and any help with or opinions about them are welcome. thanks sincerly william c waldecker 3rd