Glen Trew Posted May 24, 2011 Report Share Posted May 24, 2011 "Starquad" is not a brand, but a cable configuration that uses four conductors twisted around the axis of the cable, maintaining their order inside the cable. When using starquad cable in a balanced circuit, imagining that the conductors are numbered in order 1, 2, 3, & 4, the two even conductors are paired together and the odd connectors are paired together when attaching to the connetor. As an aid, manufacturers often color-code the even conductors one color and the odd conductors are another conductor. So, in the case of XLR cables made of starquad wire with conductors that are white and conductors that are blue, the whites are connected to either pin 2 or pin 3, and the blues are connected to either pin 2 or pin 3. It makes no difference which color pair goes to pin 2 and which goes to pin 3. It only matters that the conductors of each color stay together and connect to the same pin, and are on the same pin number at both ends of the cable. Blue to 2 or blue to 3; it makes no difference at all. Just be sure to treat both ends of the cable the same, and be sure to put the shield on pin 1. As with all general purpose balanced cables using XLR connectors, also connect pin 1 to the grounding tab. Regarding what's been called, in this thread, "the BBC standard" of pairing red/white, blue/green: Some manufacture color code their starquad cables with four different colors, and will provide specs about which colors to pair together for a balanced starquad circuit. One very good reason to use four different colors for these cables is for when using them for something other than the balanced starquad configuration, such as when four independent conductors are needed (control cables and balanced stereo cables are examples). It should be said that the starquad scheme is not without fault, and that long runs will degrade the high frequencies in an audio signal. However, it should also be said that this degradation would typically only be a factor with unusually very long runs, the affects of which would usually be out-weighed by the benefit in noise reduction. Glen Trew Quote Link to comment Share on other sites More sharing options...
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