In-wall Coax/BNC for CCTV – Can it do 4K?

I’m going to be upgrading the CCTV in my house to a newer system very soon. Obviously, 4K if possible… but I’m not willing to run new wires to do it.

The current camera wiring is coax with BNC connectors on each end. Roughly 9 year old wiring. Is it highly unlikely that the existing wiring won’t support 4K from the new cameras or should I be ok?


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