Phono cables connect a turntable's tonearm to a phono stage. This is the lowest-level signal in audio: a moving-coil cartridge can output well under a millivolt, so the cable's shielding and grounding decide whether you hear music or hum. A standard line-level interconnect rarely does the job, because it is built for a signal hundreds of times stronger. Get this connection right and a good cartridge resolves everything it is capable of.
The phono cables here come from Viablue: the flagship NF-S5 and the more accessible EPC-2. Both use mixed silver-copper conductors, full-metal RCA housings, and a dedicated ground lead that ties the turntable to the phono stage grounding post. For more on the brand, see the Viablue phono cables collection.