I find that Bryston amps can benefit from good aftermarket power cords but do seem to be less susceptible to the effects of these cords in comparison to some other power amps. Selection is important as some well regarded well built, and expensive aftermarket power cords can actually make your Bryston amps, and other amps for that matter, sound worse than the stock cords. I was using an older Shunyata Taipan Alpha but switched to a Black Mamba HC and found the improvement worthwhile.