Looking for RCA cables from preamp to amp?

I agree with zlone, OCC single crystal is the best wire for audio far superior to anything OFC at any price, harmonic technology, acoustic zen and neotech are some of the more affordable ones. just so you know Neotech makes cables for harmonic Tech and acoustics zen and pretty much all the other companies that are using OCC signal crystal.

Just a good quality budget interconnect. You want to have good fittings and flexibility.  Blue jeans fit the bill.

On the cheap Kimber PBJ used to be a top choice, but that was years ago.

DeKay

These are not fancy, just quality. They sounds just fine. Tried a few different cables on my systems, and these sounded just as good as some much more expensive cables. 

https://www.bluejeanscable.com/index.htm

Kind of think most cables in the $50-200 range are mostly the same, you got to spend serious money to really hear the difference. For me, these have been the highest quality for the price.