No Improvement With Transparent Reference RCA Interconnects For Naim NDX 2 Streamer


I am in need of some guidance from those more audiophile educated than myself. I recently upgraded my 18-old system. My system now is: Mark Levinson 5805, Naim NDX 2 streamer with Naim XPS DR power source, Naim Uniti Core CD ripper to WAV files, and Transparent Super speaker cables.
I use the streamer mostly for music from Tidal and the Uniti Core. My dealer talked me into buying a pair Transparent Reference RCA Interconnects saying my system was good enough to benefit from the $3200 upgrade. After ~ 600 hours "burn-in" time, I have to say that the Refs don't sound any better than my 18-year old Transparent Supers. Transparent's VP even called me when I politely complained, explained how the Refs were tuned for the source impedance and suggested that my speakers may need to be re-positioned to which I replied that there is not much more room for adjustment.
I am wondering several things: if the Refs are simply overkill for Naim's mid-level streamer, or if Transparent "tuned" the boxes incorrectly, or if the Ultras would be better, or if a different brand of interconnects would be better, or fill in the blank.
Your thoughts would be greatly appreciated.
paulg24
How significantly different was the positioning?
Where did they move to relative to where you had them?
paulg24

With Audio Advice, you are certainly in excellent company.
My last visit and audition was in 2015.  I wish that I lived closer to Raleigh NC.

Happy Listening!
What steakster said, +1 per each statement made.      KUDOS: for experimenting, having ears and patience. 
twoleftears, I missed your questions earlier. My home theater room is 12'W x 19'L and my system is set up in one of the 12' ends. My listening chair is 11' back from the center of a straight line between the two tweeters.
I had the speakers set as follows: tweeter 41" from the back wall and 23" from the side wall. I had a 2.5" toe in.
The dealer's expert re-positioned them as follows: tweeters 48" from the back wall and 20.5" from the side wall and changed toe in to 4". Huge improvement in sound!