The best replacement for rca cables is component cables.

The best alternatives to rca cables are rated as following:
★★★★★  component cables
★★★★★  hdmi
  subwoofer cables

Your alternative for rca cables is not listed? Suggest!
Speaking about rca cables, one probably shouldn't forget about headphone jack.

Other search terms related to rca cables and their ratings are:
★★★★★ headphone jack
You have in mind a companion for rca cables and it is not yet here? Propose!



Google Trends

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rca cables
component cables
hdmi