The purpose of shielding is to contain or reject radio frequencies. It is used commonly between electronics and antennas. Your audio system has no RF going on. In the rare case that you get RF interference, shielding is helpful. Basically, you don't need it.\n\nBiamplification is not a gimmick. It is used often in professional sound reinforcement applications. It doesn't have much if any application in home audio. In order to use it in your system you would need to disconnect the crossover network in your speakers, set up an external active crossover designed for the purpose and use separate amplifiers for each driver. The idea of using it the way adiophiles use it is bsically a gimmick.\n\nSo shielded wire if found cheaper Then regular Is worth buying? \nBiamplification active works it’s the passive one that does nothing.