How important is it that all cables come from the same manufacturer?

     PCs: Five Zu Mothers (preamp, phono pre, CDP and two tubed main amps), Zu Bok (TT to SDS), two Synergistic Master Couplers (SS subwoofer amp and power purifier/distribution, both direct to AC outlets)

     Interconnects: two SR Tesla Apex (mains), Kimber Select (KS1030s on phono pre and KS1130s on CDP), SR Tricon Analog (TT)

     Speaker cable: Analysis Plus, Big Silver Oval (mains), Kimber 8TC (subs)

     The above were all cycled through, with a wide variety of Wireworld, Audio Magic, Cardas and Audioquest offerings, over the years, for comparison and found to deliver the least colored and most open presentation (sound stage/ambience retrieval), in my system/room and to my ears.

     Two 120’, twisted runs of  Southwire 10/2 AWG, SIMpull Romex (likewise: USA made), from the main breaker box, to the AC outlets.

                           NOPE (matching makes no difference, to me)!

I like all my 60 cycle hums to match.

@secretguy   😄😄😄🤣

Acoustic Zen, Harmonic technology and Neotech is OCC single crystal wire which is the best wire for audio that has been proven for over 40 years and it's not crazy expensive like other companies like audioquest and others that sell OCC crystal wire for very crazy prices, it's all the same wire made by only three manufacturers two in Japan and one in Taiwan, the wire from Taiwan is much cheaper to buy than the Japanese OCC wire and it's all the same quality because it's the same process to make it.

Thanks to all for your great responses.  I have found some excellent and fairly new to market cables that will probably be the majority of my system, but not 100%.  Purchased their power cords and a balanced XLR … immediate sonic improvement over a mix of more expensive cables they replaced.   Also upgraded my Ethernet cable, another immediate improvement.  All is good.  Thanks to all.