Upgrading power system

Since I already have components and speakers that I love, I try to make an improvement every year with something or another. Last year I bought Magnarisers for My Maggie 3.7's.  Nice improvement. Immediate difference.  The year before was power cables and conditioner, all Shunyata.  And I always wondered why there was little if any improvement.  A couple audiophiles said to replace the wall outlet. So I thought about it for years before buying a JPS labs audiophile hospital grade outlet.  After removing the original outlet, I compared them. No comparison at all, the JPS weighed almost twice as much and the metal was better quality as well. The JPS was 2o amps and the original  was 15. Would I hear the difference?  It took all of one minute.  Best $150 I ever spent.  I was skeptical until I heard the difference, mostly clearer and more pronounced highs and well defined low end.  Anybody else have this experience?