We know that Emeline Protector, a balanced portable amp by RSA, use a special connector for the amp, so if you don`t have that RSA connector, u cannot create yourself a balanced cable for your RSA protector. Whisplash Audio announced the first balanced cable for RSA Protector even though the RSA Protector is still not released yet. This balanced RSA cable is compatible with JH Audio, Ultimate Ears, and Westone custom products. Comes in 2 sizes; 48″ and 64″ .