One pair of the quad for left and another for right. This makes for a very thin and flexible stereo cable.
That is cool. I thought of this, as a fresh noob when I first learned of starquad, but was scared off of trying it by the "cable clergy" who assured me it was anathema. I'm sure the right equipment could measure why this technique is "bad", but it's cool that someone's doing it anyway and happy with the outcome.
Peace,
Sanaka