i won't dispute the fact that you heard differences.
in two channel stereo, the application of hdmi, is usually in the digital mode, between dac and transport.
i have a ps audio cable , their most expensive, composed of silver. i would consider trying other hdmi cables, but have no idea what to expect. i prefer coax to the silver hdmi, but am open to the possibility that there is some copper hdmi that i may like better.
for example, i find the silver hdmi, between ps audio dac and transport, both perfect wave, unpleasant sounding--silvery.
there are many copper hdmi cables, but i have no idea where to seek a cable, what companies manufacturer them and their differences in performances.
perhaps, you have more experience than others and can provide your perceptions of differences between them, without necessarily recommending one.
as a reviewer, i probably could get a few, but i am not sure what companies to contact.
i suppose it would be interesting for readers to peruse a comparison between several copper hdmi cables.
have any suggestions richard ?