One of the AVS sponsors, BetterCables offers RCA interconnects.
Other than that, IMO just about any name brand will suffice. This is a very controversial topic that ranges from extremes of "don't waste your money" to "made a big difference".
Without going into brands, mine cost about $30/pair for 1 meter. Am I missing something by not spending more, maybe...maybe not.
I'm fairly confident there are other areas of improvement in my system where I'll get a bigger bang for the buck than spending way more on cables.
There are all kinds of measurements that can be made to show differences in cables from a purely electrical standpoint, but I'm not aware of any blind testing that shows high statistical confidence in the audible differences of cables - maybe I missed it.
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