[Closed] How much should one spend on a HDMI lead?

ourmaninthenorth
No doubt absolute purists do do such things but it's the law of diminishing returns.

Years ago, when I frequented the Naim boards (when flirting with the idea of a full Naim set up), there were very serious threads* about people's projects to have the whole of their mains supply upgraded to very precise specs.

A friend in Hi Fi retail went to the Naim factory a few years ago and finished hand assembling his CD5.
I have wondered if line interactive UPS's would make an audible difference* but quite frankly CBA to rejig one of mine to to find out.

*= difference, but not necessarily an improvement

Some use car batteries. Some of those use Rolls Royce car batteries!