QED Reference Digital Audio 40 Coaxial Cable

Just Listen

Silver-plated signal carriers, effective high-quality shielding, and impedance-matched cordage and plugs all combine to create audible sonic improvements when compared to the competition

Triple Layer Electromagnetic Shielding

Through the use of factory controlled geometry and low permittivity foamed polyethylene dielectrics, Reference Digital Audio 40 maintains the correct characteristic impedance to match the transmission line between digital source and sink precisely. This makes for a very low jitter signal transfer which, listening tests have shown, leads to clearly audible sonic improvements.

75 Ohm Impedance matched Digiloc^TM RCA plugs

Domestic S/PDIF interfaces use the traditional RCA phono connector which is not impedance matched to the 75 Ohm transmission line. This causes measurable insertion loss and an increase in jitter due to signal reflections at the connector boundaries. The all-new Digiloc RCA plugs are more closely impedance matched than ever before and measurements have shown, reduce insertion loss by up to 1.2 dB compared to ordinary RCA plugs.

Triple Layer Electromagnetic Shielding

A dual-layer closely is woven 99.999% OFC shield braid and aluminium mylar wrap with 100% coverage comprise a triple layer electromagnetic shield coaxially spaced around the central signal carrier within a foamed polyethylene dielectric. This ensures that interference signals induced by nearby high current noise sources do not contribute to higher signal jitter than would otherwise be the case. By the same token, the shielding prevents unwanted voltage induced interference escaping the cable which might affect nearby analogue signal carriers.

Specifications

Silver Plated 99.999% Oxygen Free Copper central conductor

Extruded foamed Polyethylene (PE) dielectric – for sonic purity and low return loss

Double 99.999% OFC braid plus Al/Mylar wrap for 100% electromagnetic screening coverage

Twinleaf 24c Gold plated QED ‘Digiloc™’ RCA plugs featuring high purity copper contacts, hollow centre pin, and low eddy current design

75-ohm coaxial design with closely matched locking plug for reduced return loss

QED Lifetime Guarantee

OVERALL PERFORMANCE

Ultra-Low Jitter

Jitter is the undesired deviation from the true periodicity of an assumed periodic signal in electronics and telecommunications, often in relation to a reference clock source. A cable displaying ultra-low jitter has been measured at typically 30ps.