@Kingnoob Speaker wire that is foil shielded. You can call a local electrical contractor and see if they have 14 or 16 ga, 2 conductor stranded wire, 99.9% pure copper, SHIELDED, and jacketed. This shielded cable is used in industrial communications installations and studios. As long as it is shielded, it is EMI rated. It is usually in twisted pairs. Maybe a local industrial electrical contractor will sell off a 500 or 1000 foot roll.
I have access to it from my son, who works for a large industrial electrical contractor. They do nuclear or gas generated electrical plants, schools, colleges, industrial buildings, to name a few.
You might find it on-line too. Look for HDMI cables that are EMI tested, if interested. Read my signature.