The star-quad design for microphone cables, where four conductors are used in pairs, with a short lay length, to cancel out the effects of external electromagnetic noise, is well known in demanding applications such as TV, video and theatre where thyristor lighting control systems are in use. The cables are, of course, also suitable for line level signals.
The L-4E5AT design is an installation cable with foil screen and drain wire. Kevlar strands are incorporated into the lay-up to help prevent damage due to stretching when cables are pulled through ducts and conduits. An irradiated polyethylene core insulation provides a low-capacitance dielectric, and its high temperature resistance minimises run-back during soldering.
|16/0.12mm (0.18mm sq.)
|Irradiated polyethylene, two blue, two white
|Four wires twisted together with lay length 21mm
|Soft PVC, 5.0mm OD
|200 metres (400 metres to special order)
|Available in any multiple of 1 metre.
|White + White for A leg
|Blue + Blue for B leg