Fine tuning the system. Where do you start and how do you proceed ?

The chase for sound that does not end for sure...But if what you have is the best you have ever had enjoy the sound and slowly upgrade...I was sort of lucky in some ways that I purchased first tube amp from Raven Audio and tried their speakers from cheapest to most expensive,,And was not happy until I had the Corvus speakers .And I have upgraded 3 times on their Amps and now have the Reflection and very happy with all the detail I hear from my equipment ..But yes but I know that there is still more to capture for me to hear... Move the speakers and if using sub move it around..I know my living room is no sound room but mostly I am happy and wife has to be out of house for me to really enjoy my system for just playing 74db she is not a fan of music...That is when I relax with my Tinnitus goes away into the music...I do not play anything other than down streaming and my best sound is Tidal and using Audio Quest Diamond which gave me the best sound I myself could hear out of 4 cables I tried..Enjoy the Hobby and wish you well in achieving your best quality sound...What are you using for your system amp / speakers etc ??

You seem to have no major issue with the current system.  What exactly do you think could be improved.

  My suggestion is to make sure that you have a comfy listening seat, and adult beverage of your choice, and play music with obsessing about what small differences in sound are possible 

Good suggestion....

1. Keep it simple. look to simplify your system, not complicate it. I like to keep the signal path as simple as possible so I don’t add components. avoid widgets that promise magical improvement. Use good compaonent and good materials. I upgrade wires (not cables) and connectors more than components.

2. Don’t make changes based on reviews and recommendations. Follow the money and you realize that some very compelling words are written to sell you things. Make changes because you understand what you are trying to do and you think the new component will do it. Don’t try to solve problems that don’t exist just because a dealer or a reviewer suggests it.  You may have to do weeks or months of research to understand a change you are considering.

3. Tube rolling is fun and can be fruitful. However, don’t expect miracles. there is a good chance the tubes that are in it are there for a good reason. I just spent several hundred dollars trying different driver tubes and decided to stick with the ones in it, although a different pair of the same tubes. I am still searching for a special variety of this tube. I don’t consider this wasted money. then next pair of tubes, the output tubes, can be several thousand dollars to do tube rolling.

4. Crossovers. most speakers have crossovers that use poor components compared to the price of the speaker. upgrading your crossovers is a fertile ground. I’ve had very positive results. Again keep it simple. Not a beginner DIY project. You’ll need a friend who understands electronics as it isn’t as simple as choosing better components of the same values.

5.Patience. from your posts I don’t think that this is your greatest virtue. Move slowly, do lots of reading, make your own decisions. when you do make a decision, sleep on it and be self critical before making a change.

Jerry

Start by assessing what you like about the sound you are getting and what improvements you want.  Keep in mind that anything that you do, if it is at all effective, alters the sound and that can be for better or worse.  Be prepared to accept that something you do might have to undone.  I am amazed at how many threads talking about power cords, interconnects and tweaks have very little comment about changes that were detrimental when there should be a lot more instances where a change in sound went the wrong way.  It helps to be more open minded about one’s own purchases.  
 

With tube gear, I would start with trying different tubes based on commonly shared experiences reported about tubes.  Some tubes are warmer sounding, or more dynamic and detailed sounding, etc.  I would start with the cheaper tubes, which tend to small signal input and driver tubes.  Even though they can be much more expensive, consider vintage tubes—many are much better than current production.

Interconnects and speaker cables would be next for me; they tend to make a bigger difference than power cords.  But, if you are using the cords that came with the gear, junk that and go with something a little better before searching for the ultimate set of power cords.  You will hear differences between very good chords, but that difference is comparatively subtle and more evident when you have dialed in the rest of your system.

Vibration damping/control via specialized racks, equipment footers, etc. can have substantial impact on sound and I personally find it is easy to overdo this and end up going the wrong way.  Sometimes you don’t even know you goofed until you pull all the stuff out and find out that you now like your system more.