QED X-Tube XT400

摘要

Another long-term favourite, QED's XT400 offers the chunkiest conductor cross-section of the test, its silver-plated 5N copper strands bundled into two 4mm~2 cores that offer a mere 7mohm/m loop resistance. The strands are wound around a polyethylene 'AirCore' tube with a conductive Mylar wrap and clamped in a pearl-coloured PVC outer jacket. XT400 is surprisingly flexible and the classic figure-of-eight geometry yields a low 47pF/m capacitance (just 235pF for a 5m set) combined with a moderate 0.52μH/m inductance.