Furutech GTX NCF receptical break in, how long

Interesting thread! Thanks for posting your updates in the process.
I have a Furetech GTX-D-rhodium sitting in my drawer. It was in my wall for a while; Very similar experience. I just figured not a good fit, bad synergy, etc, so I swapped back to my glorified Hubbell /PS Audio and the immediate issues went away.
Maybe I should rig up a test fixture for the GTX and install it in about three months.

I have noticed system variability though, and chalk it up to grid; I’m an EE but my forte is PCB design for complex embedded systems; I recall the power factor topic in a power systems class. Someone please refresh me: does power factor at the load vary with changes on the line due to OTHER loads present on the line ( that can come and go analogous to wi-Fi devices coming on/off network) or is it totally dependent only on the loads complex relationship ( reactive behavior) with the immediate incoming power?
When my system goes through a period of “bass light” and lacking in its normal “punch” it feels like the amp is simply starved for current. This happens on the order of a few weeks give or take. I’ve noticed this phenomenon in every system I’ve ever put together in every location ( different houses); one time it was so bad ( at that time I had an Audio Research 100.2 amp) I thought the amp was seriously on the way out... but came back the next day and the music was back again. Bass authority, dynamic drive, and loss of presence, are the triad of characteristics that usually suffer most during these phases of audio life;
This leads me to believe that power factor fluctuations from other loads impinge onto the power amp and wreak havoc when non-ideal. The amplifier’s power supply component impedance has not changed( or does it vary???), nothing else moved, etc...
I have what appears to be, based on reviews and theory, an incoming power conditioner; a P.I. Audio Group UberBUSS; This device has power factor network...looking forward to hearing this in the system.
Cool thread!

I currently have about 20 hours on the GTX-D NCF. It's true that it sounds great during first few hours. It's sounding not very good at the moment with a flat sound and rolled off treble. I can't wait to get this thing past the 500 hours mark. Still a long way to go 😭

It sounds terrible between 20 to 50 hours. I hope it will sound better approaching 100 hours.

Right. I'm not sure if some of you guys are exaggerating on the numbers. Currently I'm between 100 and 150 hours. I would say the sound quality is great after the 100 hours mark is passed. No more fluctuations.

Right, I can’t believe I’m updating this thread. A little update. Just today I’m hearing a change with the system. The bass is hitting lower and sounds fuller with better definition and detail. More defined. Midrange and treble also sound fuller and fleshed out. The highs sound silkier and more illuminating. I can’t believe this. I thought I’m not getting anymore changes with the system but it looks like the Furutech NCF receptacle really needs time to break-in.

I’ve made some calculations and so far I think I have about 300 hours on the outlet. If this thing will only give its 100% after reaching 500 hours as claimed by few here, I can’t imagine how my system would sound like then. At the rate I’m going I think I need 2 more months to get to the 500 hour mark.