My system is very simple and has the least amount of connectors USB interface to DS out to AMP then Speakers (I’m only refereeing the audio signal wires - interconnects, USB cable and speaker cables in this post) not AC or MISC connectors inside components.
I recently cleaned all connectors throughout my system including the XLR balanced connectors which I’ve not done for years. Sitting back listening to my system after completing this task was amazing along with this NUC and win server 2012 with Audiophile optimiser is the best I’ve heard my system sound.
I wonder how many of us really clean “every connector” not leaving any out eg: USB connectors included J
The resulting sound improvement was comparable to adopting server 2012 as the operating system upgrade from Win8
An element of settling for the best sound source should include regular cleaning regimen for all connectors.
Give them a clean today and report back here if doing so had a positive result or nothing at all on the sound heard