Opinion: All electronics require some burn-in time to reach their peak sound. Leaving things turned on between listening sessions helps as well. Set a CD on repeat-all play for 200+ hours (no volume necessary) and then compare with the out of the box sound you remember. I've found with a variety of equipment at all price points that 200-250+ hours is the minimum time I burn in everything.
For an affordable power cord that delivers great performance, try the Audience Powerchord "E" version. I've been using them for quite a few months after using many others over the years and am very happy with their performance. The "E" versions pop up less frequently on Audiogon but are worth the wait. The Cable Company also sells them both new and used at fair prices. (I'm not a dealer or affiliated with one).
For an affordable power cord that delivers great performance, try the Audience Powerchord "E" version. I've been using them for quite a few months after using many others over the years and am very happy with their performance. The "E" versions pop up less frequently on Audiogon but are worth the wait. The Cable Company also sells them both new and used at fair prices. (I'm not a dealer or affiliated with one).