Of course, you're going to say that two wires insulated from each other cannot possible be in the same place, right? Wrong! And the way to get two wires in the same place is to start with four wires spiraled together, as shown in the image below.

Blog20_How_Starquad_Works_Quad_Cross-section

If you combine the wires across from each other, you end up with a pair.

Blog20_How_Starquad_Works_Conductors_Combined

But look at that first picture of the inside of the cable and think about the electromagnetic noise. By combining the wires, you really do have the two conductors inside each other. Even if you don't believe it, the proof is in what this amazing design can do. For instance, one of the worst noise offenders is 60 Hz power (50 Hz for much of the world).

There is no shield of any kind that we can apply to a cable that has any effect on that low frequency. Even a solid steel conduit, perfectly installed, is only around 30 dB of noise rejection at 60 Hz. But starquad cable is up to 50 dB noise rejection at 60 Hz.

If I were running mic lines near power cables, I definitely would think about starquad! If I was hanging audience microphone from a lighting grid, I definitely would think about starquad.

Belden makes three sizes: Belden 1192A, full size, Belden 1172A small size, and Belden 1804A miniature. The full size is standard mic cable size. The smaller one is excellent for wiring mic booms, or places with restricted space. The miniature is like lavaliere cable.