I made my first visit to a certain independent dealer in SoCal in the 70's, and they had a thirty foot run of Cardas single-ended interconnect between their Audio Research Pre and Power. Knowing the high output impedance of the pre, I asked about the certain resulting roll-off in high frequencies. The dealer indignantly (how dare I question the layout and hook-up of his system. HE'S the expert!) replied, "Well, it sounds good". What did that say about his whole system? Something was wrong somewhere! By the way, the dealer is still in business, and still sells ARC electronics.