Sometimes my system sounds great, sometimes awful


Does this happen to any of you? Sometimes I find that my system sounds great, but sometimes, with the same record, same everything, it sounds awful! It drives me nuts. Do we hear differently depending the time of day, our mood, heat, cold... other circumstances? Whenever I think I have to replace a component or trash a cable I tell myself to wait until the next day to overcome upgradetitis.
vmm
Maybe you should get a super duper system - the kind where the system costs more than your home, then it will sound great all the time, any day of the year...:-)
The only thing I notice is that things do sound better after a few hrs of being powered on and everything has come up to operating temperature.
the poster who mentioned the power coming out of the wall is probably right on. I lived in an area with a stressed power grid, and I was shocked at the improvment I heard when I added a good conditioner with battery back up. Made a huge difference, more than anything else, tweak wise, I have ever tried.