The term SR, when used in connection with cable refers to a “semi rigid” housing that sits just below the plugs at either end of the cable. This is typically the weakest part of any cable and is the most common cause of product failure over time. Cables from MiTEC use an extended and reinforced SR collar to help protect the cable housing as it connects to the plug. A normal SR is tested, with a pull and twist technique, 10,000 times. The new MiTEC SR is tested 20,000 times and is designed to stop wear and tear splitting at this weakest point. This has proven to reduce returns and protect the cables for a significantly longer period of time which is why we offer a lifetime warranty.