Looking for RCA cables from preamp to amp?

Ditto Blue Jeans cables. Read their articles, good info on how and why cables do matter, make a difference sometimes, and yet you don’t need to spend thousands. Their products are designed well, made well, and inexpensive relative to $$$ “audio specialty cables.” 

Look up "Prosper Cables" on Etsy. Custom made.

Since this is for home theater use or movies you don’t have to get expensive ones, just good quality budget interconnects would do just fine. 

Maybe I should be more clear about my rational, such that folks do not think that I am endorsing Blue Jeans cables as great sounding cables. I tried a couple pairs and found them to perform roughly the same as OEM cables, just better built. On AVR based systems, it is unlikely expensive cables will provide a noticeable improvement. My experience has been they don’t. You need a certain level of high resolution and low noise floor for good sounding cables to make an impact that is cost effective.

Cables for your/anyone's system is a crapshoot.....you really have to listen to them.    I suggest Mogami,......the most expensive cables are an interesting comparison