I too have recently joined the HiDiamond camp of believers with their P4 power cords. Recently replaced my two SR cords with P4's on my amp and dac, and to echo comments already posted, a very nice improvement, and no more wall warts. I had auditioned a PC by Enklein, the Taurus, which perhaps might be a tad clearer on my amp, but the price/benefit ratio was not there. I like the price/quality aspect of HiDiamond. Count me in.