What is your approach to system fine tuning with cables and cords ?

Ha , I just love these people who judge sound by the name of the equipment used . A long time , experienced diyer could put together a system with no badges of names on anything and some guys would assume it is not to their standards , Small minded . Come out of the cave man !

Elizabeth, I am glad that you get the message.
I will add only this, just in case that I might be right, at least to a degree. Speakers, any speakers, should sing not scream.

Elizabeth stated:
 "One reason it was easy to for me to hear differences.. My drive for clarity brought the sound to the edge of lean over and over.. keeping it warm enough with the clarity uppermost was the challenge. So the sound has been on this edge for years.. Finding ways to make it warm up a bit and still keep the clarity. So I am really used to hearing this and able to make adjustments to bring it back to warm enough to make me happy, while still having amazing clarity."
    
    Hello Elizabeth,
     I think I understand your desire to balance clarity/leanness and warmth in your system's overall sound quality.  You enjoy the clarity because it not only enables you to hear fine details in the music but it also allows you to discern whether or not alternate power cords and Ics, Furutech duplexes,  AC noise removal gizmos and other smaller changes are actually creating marginal improvements in your system's performance.
     However,  you find yourself constantly guarding against your system's overall sound becoming too lean because you also enjoy a warm quality to be present in your system.  
     This all makes sense to me and seems familiar because I have the same inclinations in my preferred overall system sound.  
     I previously thought I achieved this by pairing a VTL 2.5 preamp with NOS Mullard tubes and various decent quality class AB ss amps (McCormack, Aragon, etc.) to drive my older pair of Magnepan 2.7QR speakers.
     A few years ago, however, I swapped out my good quality class AB  stereo amp for a pair of good quality class D mono blocks.  These new amps were a revelation to me in terms of clarity.  In retrospect, I thought my former amps provided clarity but these new amps caused me to redefine what system clarity, neutrality, transparency and detail actually was.
     I thought improved pcs, ics, speaker cables, isolation platforms and dedicated AC lines resulted in better overall performance of my system but now think it may have just been a placebo effect.  With the class D monos in my system, all of these types of small changes,comparisons and marginal improvements are clearly audible and obvious. 
     Anyway, back to the subject.  Just like you, I also enjoy some warmth in my system sound.  But, after some experimentation, I believe I've achieved this warmth in an alternative approach that you may find interesting, counterintuitive and informative.
     As an experiment, I reconfigured my system with optimum clarity as the goal.  I replaced my tube preamp with a good quality very neutral ss unit and setup a hi-res computer audio system as a source with a 2 TB NAS.  I ripped my entire cd collection to the NAS's hard drive and also downloaded numerous hi-res 24bit/96Khz FLAC music files recorded direct to digital from Sound Liaison.com in Europe. 
     The results to my system's overall sound was amazing and counterintuitive.  The sound was very detailed and transparent with the quality of the recording and mastering clearly varying depending on the cd file played but the hi-res direct to digital 24/96 FLAC files were significantly and consistently superior in recording and mastering quality with resultant improved detail, sound staging and especially improved dynamics that sounded more realistic like the dynamics present on live music.
     But the truly amazing discovery was that I still perceived the bloom and warmth on both cd and hi-res files.  Yes, it varied in intensity by file and music played but my main point is that it wasn't missing and too lean.
     So, I've come to the conclusion that we should probably add the music played as another method of imparting bloom and warmth to a system's overall sound.
Tim

We can go in all directions. One of them is how you musically match cartridge and speakers. After all, it is the beginning and the end of the signal. Tuning and fine tuning the listening room is a big subject, of course.

Now that I have the actual equipment pretty good. I have been starting to think I should do something for the room, at minimum the wall behind the speakers. Being a very large picture window. The first thing  I would do is below the window, to the sides of the in wall air conditioner, some wood block diffusers.. I would hang them from the window sill, as they need to be above and enough behind the full length floor heating element to not block the heating unit.  Some things cannot be done to the windows.. rules etc. But I think I could make something right at the window dividers to help dispersion. Something vertical with lots of diffraction, at most a few inches wide. (if  I worked on it, perhaps actually framing the Windows by maybe two inches? Finally, above?? Something very light, I can make a beam full length carried at the far sides by the bookshelves at the corner sides..  with diffusing elements attached to it.
Currently I feel there is too much sort of reverb off the back. So possibly just the things I am considering would be enough, without actually blocking the windows more. Which, like a wrote is not really allowed. (drapes are permitted but I will not close the heavy drapes I now own, for a variety of reasons. mainly pets.) All that is a thought experiment.. Maybe eventually I might do something.. maybe.. I am in no hurry.